McqMate
| 101. |
The source of oxygen generated during photosynthesis is: |
| A. | water |
| B. | carbon dioxide |
| C. | chlorophyll |
| D. | mesophyll cells |
| Answer» A. water | |
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Explanation: The source of oxygen produced during photosynthesis is the splitting of water molecule into hydrogen and oxygen. Photosynthesis uses carbon dioxide and water, releasing oxygen as a waste product. Although photosynthesis can happen in different ways in different species, some features are always the same. For example, the process always begins when energy from light is absorbed by proteins called photosynthetic reaction centers that contain chlorophylls. In plants, these proteins are held inside organelles called chloroplasts, while in bacteria they are embedded in the plasma membrane. |
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| 102. |
Which one of the following elements is associated with teeth disorder? |
| A. | Chlorine |
| B. | Fluorine |
| C. | Bromine |
| D. | Iodine |
| Answer» B. Fluorine | |
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Explanation: Fluorine is the element that is associated with teeth disorder because the presence of sodium fluoride in drinking water at the level of 2 ppm may cause mottled enamel in teeth, skeletal fluorosis, and may be associated with cancer and other diseases. However, topically applied fluoride (toothpaste, dental rinses) has been shown to help reduce dental caries. |
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| 103. |
Water in plants is transported by - |
| A. | cambium |
| B. | phloem |
| C. | epidermis |
| D. | xylem |
| Answer» D. xylem | |
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Explanation: Water is transported through the plant in Xylem vessels, these begin in the roots and end in the leaves of the plant, water is translocated through a combination of "Transpirational pull" and capillary action. Xylem is one of two "conductive" tissues responsible for moving water and the products of photosynthesis (glucose) through the plant, the tissue responsible for moving the "food" around is Phloem. |
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| 104. |
Where are the Eucalyptus trees found in abundance - |
| A. | Mizo Hills |
| B. | Naga Hills |
| C. | Manipur Hills |
| D. | Nilgiri Hills |
| Answer» D. Nilgiri Hills | |
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Explanation: Eucalyptus belongs to the family Myrtaceae with about 300 species of the genus.The species is one of the fastest growinat' trees in the world and many species attain great heights. In Indian subcontinent it is mostly found in Nfigiri hills. Extensive commercial planting and harvesting of non-native eucalyptus is done in large numbers. |
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| 105. |
All the progeny obtained from a single plant by vegetative pro pa-gallon are called - |
| A. | Clones |
| B. | Pure line |
| C. | Indred line |
| D. | Pedigree line |
| Answer» A. Clones | |
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Explanation: A clone is obtained by vegetative propagation of a single plant and it propagates vegetatively in successive generation. It offers excitation for exploiting desirable mutations. It maintains purity of race in heterozygous state. The clones retain their original characteristics after many years of vegetative propagation i.e. they are stable. |
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| 106. |
What is a Sponge? |
| A. | A fungus |
| B. | A fossil |
| C. | A plant |
| D. | An animal |
| Answer» D. An animal | |
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Explanation: Sponges are animals of the phylum Porifera. They are multicellular organisms which have bodies full of pores and channels allowing water to circulate through them, consisting of jellylike mesohyl sandwiched between two thin layers of cells. Sponges have unspecialized cells that can transform into other types and which often migrate between the main cell layers and the mesohyl in the process. Sponges do not have nervous, digestive or circulatory systems. |
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| 107. |
Which among the following helps in circulation of blood? |
| A. | Arithrocyt us |
| B. | Blood platelets |
| C. | Monocytes |
| D. | Lymphocytes |
| Answer» D. Lymphocytes | |
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Explanation: Lymphocytes helps in the circulation of blood. A lymphocyte is a type of white blood cell in the vertebrate immune system. The lymphatic system is an open system providing an accessory route for excess interstitial fluid to get returned to the blood. Lymph is essentially recycled blood plasma after it has been filtered from the blood cells and returned to the lymphatic system. |
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| 108. |
Which among the following elements increases the absorption of water and calcium in plants? |
| A. | Manganese |
| B. | Boron |
| C. | Copper |
| D. | Molybdenum |
| Answer» B. Boron | |
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Explanation: Boron increases the absorption of water and calcium in the plants. It helps in the metabolic activities in plants. Boron is necessary in order for sugar to move through protoplasmic membranes. |
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| 109. |
Pencillin is extracted from - |
| A. | yeast |
| B. | algae |
| C. | fungus |
| D. | lichen |
| Answer» C. fungus | |
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Explanation: Penicillin is produced from the genus of fungi "penicillia". All penicillin are d- lactam antibiotics and are used in the treatment of bacterial infections caused by susceptible, usually Gram-positive, organisms |
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| 110. |
Rod shaped bacteria is called - |
| A. | Bacillus |
| B. | Spirillum |
| C. | Coccus |
| D. | Coma |
| Answer» A. Bacillus | |
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Explanation: Bacillus is a genus of Gram- positive, rodshaped bacteria and a member of the phylum Firmicutes. Bacillus species can be obligate aerobes or facultative anaerobes, and test positive for the enzyme catalase. Bacillus includes both freeliving and pathogenic species. Under stressful environmental conditions, the cells produce oval endospores that can stay dormant for extended periods. |
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| 111. |
The animal which has become extinct recently in India happens to be - |
| A. | Golden cat |
| B. | Cheetah |
| C. | Wooly wolf |
| D. | Rhinoceros |
| Answer» B. Cheetah | |
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Explanation: Cheetahs have been known to exist in India for a very long time, but as a result of hunting and other causes, cheetahs have been extinct in India since the 1940s. The cheetah is the only animal that has been described extinct in India in the last 100 years. |
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| 112. |
Which one of the following is found only in women? |
| A. | Thyroid |
| B. | Pituitary |
| C. | Ovary |
| D. | Adenoid |
| Answer» C. Ovary | |
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Explanation: Men don't have ovaiy. Women have a pair of ovaries which is a sexual gland responsible for producing estrogen. In men, testis has same functions as ovary in women. it produces testosterone. |
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| 113. |
‘Darwin finches’ refer to a group of : |
| A. | Fishes |
| B. | Lizards |
| C. | Birds |
| D. | Amphibians |
| Answer» C. Birds | |
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Explanation: Darwin's finches are a group of about 15 species of passerine birds. They often are classified as the subfamily Geospizinae or tribe Geospizini. They were first collected by Charles Darwin on the Galapagos Islands during the second voyage of the Beagle. All are found only on the Galapagos Islands. The birds vary in size from 10 to 20 cm and weigh between 8 and 38 grams. The smallest are the warbler-finches and the largest is the Vegetarian Finch. The most important differences between species are in the size and shape of their beaks, and the beaks are highly adapted to different food sources. The birds are all dull-coloured. |
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| 114. |
The tissue in man where no cell division occurs after birth is - |
| A. | skeletal |
| B. | nerves |
| C. | connective |
| D. | germinal |
| Answer» B. nerves | |
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Explanation: A nerve is an enclosed, cable-like bundle of axons (the long, slender projections of neurons) in the peripheral nervous system. A nerve provides a common pathway for the electrochemical nerve impulses that are transmitted along each of the axons to peripheral organs. A nerve conveys information in the form of electrochemical impulses (known as nerve impulses or action potentials) carried by the individual neurons that make up the nerve. These impulses are extremely fast, with some militated neurons conducting at speeds up to 120 m/s. |
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| 115. |
Sea sickness is due to the effect of the motion of ship, on - |
| A. | internalear |
| B. | heart |
| C. | stomach |
| D. | eyes |
| Answer» C. stomach | |
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Explanation: Motion sickness or kinetosis, also known as travel sickness, is a condition in which a disagreement exists between visually perceived movement and the vestibular system'ssense of movement. Depending on the cause it can also be rcferred to as seasickness, car sickness, simulation sickness or airsickness. If the motion causing nausea is not resolved, the sufferer will usually vomit. Ginger is reported to calm the pyloric valve located at the base of the stomach. This relaxation of the valve allows the stomach to operate normally whereby the contents will enter the small intestine instead of being retained within the stomach. |
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| 116. |
The name of the first cloned sheep was |
| A. | Molly |
| B. | Dolly |
| C. | Jolly |
| D. | Roly |
| Answer» B. Dolly | |
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Explanation: Dolly was a female domestic sheep, and the first mammal to be cloned from an adult somatic cell, using the process of nuclear transfer. She was cloned by Ian Wilmut, Keith Campbell and colleagues at the Roslin Institute and the biotechnology company PPL Therapeutics near Edinburgh in Scotland. The cell used as the donor for the cloning of Dolly was taken from a mammary gland, and the production of a healthy clone therefore proved that a cell taken from a specific part of the body could recreate a whole individual. |
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| 117. |
Through ‘Photosynthesis’ green plants generate - |
| A. | inorganic materials |
| B. | minerals |
| C. | organic materials |
| D. | nutrients |
| Answer» C. organic materials | |
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Explanation: Photosynthesis is the process by which green plants and certain other organisms transform light energy into chemical energy. Photosynthesis in green plants harnesses the energy of sunlight to convert carbon dioxide, water, and minerals into organic compounds and gaseous oxygen. The principal organic products of plant photosynthesis are carbohydrates. Formation of the simple carbohydrate glucose is shown by the equation: 6CO2 (carbon dioxide)+ 12H2O (water) —> C6H12O6 (glucose) + 6O2 (oxygen) + H2O (water). |
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| 118. |
The first photosynthetic oxygen liberating organisms to appear on earth were |
| A. | Cyanobacteria |
| B. | Bryophytes |
| C. | Green algae |
| D. | Bacteria |
| Answer» A. Cyanobacteria | |
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Explanation: Cyanobacteria or blue green algae were the photosynthetic organisms that lived in the ancient ocean. It liberated the oxygen found in the iron oxide. |
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| 119. |
Which is the anticoagulant substance in blood? |
| A. | Fibrinogen |
| B. | Heparin |
| C. | Thrombin |
| D. | Globin |
| Answer» B. Heparin | |
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Explanation: Heparin, a highly sulfated glycosaminoglycan, is widely used as an inject able anticoagulant, and has the highest negative charge density of any known biological molecule. It can also be used to form an inner anticoagulant surface on various experimental and medical devices such as test tubes and renal dialysis machines. Although it is used principally in medicine for anticoagulation, its true physiological role in the body remains unclear, because blood anti-coagulation is achieved mostly by heparin sulfate proteoglyeans derived from endothelial cells. |
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| 120. |
Sugarcane is a type of – |
| A. | creeper |
| B. | tree |
| C. | shrub |
| D. | grass |
| Answer» D. grass | |
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Explanation: Sugarcane is a tropical, perennial grass that forms lateral shoots at the base toproduce multiple stems, typically three to four m (10 to 13 ft) high and about 5 cm (2 in) in diameter. |
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| 121. |
Mineral constituent of chlorophyll is - |
| A. | Iron |
| B. | Magnesium |
| C. | Calcium |
| D. | Potassium |
| Answer» B. Magnesium | |
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Explanation: Chlorophyll is the molecule that absorbs sunlight and uses its energy to synthesize carbohydrates from CO2 and water. This process is known as photosynthesis and is the basis for sustaining the life processes of all plants. Since animals and humans obtain their food supply by eating plants, photosynthesis can be said to be the source of our life also. Chlorophyll is the molecule that traps this `most elusive of all powers' - and is called a photoreceptor. It is found in the chloroplasts of green plants, and is what makes green plants, green. |
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| 122. |
Which of the part of tongue bears cells for sour taste? |
| A. | Front |
| B. | Back |
| C. | Sides |
| D. | Middle |
| Answer» C. Sides | |
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Explanation: Taste buds probably play the most important part in helping us to enjoy the many flavors of food. Our taste buds can recognize four basic kinds of tastes: sweet, salty, sour, and bitter. The salty/sweet taste buds are located near the front of our tongue; the sour taste buds line the sides of our tongue; and the bitter taste buds are found at the very back of our tongue. |
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| 123. |
Who discovered malaria causing germs? |
| A. | Christiaan Bernard |
| B. | Charles Louis Alphonse Laveran |
| C. | Dmitry Ivanovsky |
| D. | Martinus William Beijerinck |
| Answer» B. Charles Louis Alphonse Laveran | |
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Explanation: Charles Louis Alphonse Laveran, a French army surgeon stationed in Constantine, Algeria, discovered that malaria was caused by a protozoan parasite in 1880. |
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| 124. |
Which one of the following is not an example of eukaryotic organism? |
| A. | Yeast |
| B. | Bacteria |
| C. | Plant |
| D. | Human being |
| Answer» B. Bacteria | |
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Explanation: Eukaryotes are organisms whose cells have a nucleus enclosed within membranes. |
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| 125. |
Which of the following snakes killed for its beautiful skin has been declared an endangered species? |
| A. | Python |
| B. | King Cobra |
| C. | Russel's Viper |
| D. | Krait |
| Answer» C. Russel's Viper | |
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Explanation: Russell's Vipers are highly venomous terrestrlal snakes found in India which are known for their dark brown spots and iustrous skin. Russell's Vipers are protected under the schedule ll of wildlife protection Act. |
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| 126. |
The colour of the eye depends upon the pigment present in - |
| A. | cornea |
| B. | iris |
| C. | rods |
| D. | cones |
| Answer» B. iris | |
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Explanation: Eye colour is a polygenic phenotypic character determined by 2 distinct factors: the pigmentation of the eye's iris and the frequency-dependence of the scattering of lightby the turbid medium in the stroma of the iris. In humans, the pigmentation of the iris varies from light brown to black, depending on the concentration of melanin in the iris pigment epithelium (located on the back of the iris), the melanin content within the iris stroma (located at the front of the iris), and the cellular density of the stroma. |
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| 127. |
DNA finger printing is used to identify the - |
| A. | Parents |
| B. | Rapist |
| C. | Thieves |
| D. | All the above |
| Answer» D. All the above | |
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Explanation: DNA profiling (genetic fingerprinting) is a technique employed by forensic scientists to assist in the identification of individuals by their respective DNA profiles. DNA profiles are encrypted sets of numbers that reflect a person's DNA makeup, which can also be used as the person's identifier. DNA profiling should not be confused with full genome sequencing. It is used in, for example, parental testing and criminal investigation. |
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| 128. |
The normal cholesterol level in human blood is - |
| A. | 80 - 120 mg% |
| B. | 120 - 140 mg% |
| C. | 140 - 180 mg% |
| D. | 180 - 200 mg% |
| Answer» D. 180 - 200 mg% | |
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Explanation: Cholesterol is defined as a waxy alcohol, fat-like substance that occurs naturally in all areas of the human body. 100-200 mg/dL is considered as normal for the human beings. However it must be noted that total cholesterol counts below 180 mg/dl increase the risk for hemorrhagic stroke; below 180 cholesterol levels are inversely associated with risk. Total cholesterol counts above 200 mg/dl may be normal and healthy for some people, as the ratio of LDL to HDL cholesterol is considered a more important factor in prediction of disease risk. |
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| 129. |
Saponification involves the hydrolysis of fats and oils by- |
| A. | water |
| B. | washing soda |
| C. | stearic acid |
| D. | caustic soda |
| Answer» D. caustic soda | |
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Explanation: Caustic soda (sodium hydroxide) is a versatile alkali. Its main uses are in the manufacture of pulp and paper, alumina, soap and detergents, petroleum products and chemical production. |
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| 130. |
The branch of medical science which is concerned with the study of disease as it affects a community of people is called : |
| A. | epidemiology |
| B. | oncology |
| C. | paleontogy |
| D. | pathology |
| Answer» A. epidemiology | |
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Explanation: Epidemiology is the study of the distribution and determinants of health-related states or events (including disease), and the application of this study to the control of diseases and other health problems. |
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| 131. |
Wisdom teeth is the - |
| A. | 1st molar teeth |
| B. | 2nd molar teeth |
| C. | 3rd molar teeth |
| D. | 4th molar teeth |
| Answer» C. 3rd molar teeth | |
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Explanation: A wisdom tooth, in humans, is any of the usual four third molars. Wisdom teeth usually appear between the ages of 16 and 25. They are generally thought to be called wisdom teeth because they appear so late - much later than the other teeth, at an age where people are presumably "wiser" than as a child, when the other teeth erupt. The term probably came as a translation of the Latin dens sapientiae. |
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| 132. |
The tusk of elephant is an enormously enlarged - |
| A. | upper incisor |
| B. | upper canine |
| C. | lower canine |
| D. | lower incisor |
| Answer» A. upper incisor | |
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Explanation: Tusks are elongated, continuously growing front teeth, usually but not always in pairs, that protrude well beyond the mouth of certain mammal species. They are most commonly canines, as with warthogs, pig, and walruses, or, in the case of elephants, elongated incisors. The tusks are actually upper incisors, not canines. They are the only incisors the elephant has. Elephants, mastodons, and mammoths all have upper incisor teeth that emerge from the skull as tusks. |
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| 133. |
Scurvy is caused due to the deficiency of - |
| A. | Vitamin-D |
| B. | Vitamin-K |
| C. | Vitamin-E |
| D. | Vitarnin-C |
| Answer» D. Vitarnin-C | |
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Explanation: Scurvy is a disease resulting from a deficiency of vitamin C, which is required for the synthesis of collagen in humans. Scurvy often presents itself initially as symptoms of malaise and lethargy, followed by formation of spots on the skin, spongy gums, and bleeding from the mucous membranes. Scurvy was at one time common among sailors, pirates and others aboard ships at sea longer than perishable fruits and vegetables could be stored (subsisting instead only on cured and salted meats and dried grains) and by soldiers similarly separated from these foods for extended periods. Scurvy is sometimes referred to as Barlow's disease, named after Sir Thomas Barlow, a British physician who described it. |
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| 134. |
Male (Anopheles) mosquito feeds on - |
| A. | Blood of man |
| B. | Nectar of flower |
| C. | Blood of Culex |
| D. | Blood of Leech |
| Answer» B. Nectar of flower | |
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Explanation: Typically, both male and female mosquitoes feed on nectar and plant juices, but in many species the mouthparts of the females are adapted for piercing the skin of animal hosts and sucking their blood as ectoparasites. In many species, the female needs to obtain nutrients from a blood meal before she can produce eggs, whereas in many other species, she can produce more eggs after a blood meal. |
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| 135. |
Identify an example of a connective tissue in humans - |
| A. | Muscles |
| B. | Cell |
| C. | Bone |
| D. | Fibres |
| Answer» C. Bone | |
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Explanation: Connective tissue, group of tissues in the body that maintain the form of the body and its organs and provide cohesion and internal support. |
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| 136. |
Photosynthesis is a/an - |
| A. | exothermic process |
| B. | endothermic process |
| C. | a neutral process |
| D. | a thermostatic process |
| Answer» B. endothermic process | |
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Explanation: Photosynthesis is an endothermic reaction because in order for it to occur, the plants in which it occurs must absorb energy. |
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| 137. |
Which of the following are warm blooded animals? |
| A. | Whales |
| B. | Whale Sharks |
| C. | Alytes |
| D. | Dram |
| Answer» A. Whales | |
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Explanation: Animals, such as mammals and birds, that maintain a constant body temperature regardless of the temperature of the surroundings are called warm blooded. It describes animal species which have a relatively higher blood temperature, and maintain thermal homeostasis primarily through internal metabolic processes. |
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| 138. |
Syrinx is the voice box in - |
| A. | Amphibians |
| B. | Reptiles |
| C. | Birds |
| D. | Mammals |
| Answer» C. Birds | |
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Explanation: Syrinx is the name for the vocal organ of birds. Located at the base of a bird's trachea, it produces sounds without the vocal cords of mammals. The sound is produced by vibrations of some or all of the membrana tympaniformis (the walls of the syrinx) and the pessulus caused by air flowing through the syrinx. |
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| 139. |
The ability of the eye to see in the dark, is due to the production of a purple pigment known as |
| A. | Carotene |
| B. | Rhodopsin |
| C. | Iodopsin |
| D. | Retinene |
| Answer» D. Retinene | |
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Explanation: Retinene-1 is better known as retinaldehyde or simply retinal and is fundamental in the transduction of light into visual signals in the photoreceptor level of the retina (known as the visual cycle). Retinene-2 is more formally known as dehydroretinaldehyde. |
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| 140. |
Which organ of the body produces the fluid known as bile? |
| A. | Liver |
| B. | Pancreas |
| C. | Gall bladder |
| D. | Kidney |
| Answer» A. Liver | |
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Explanation: Liver produces a digestive fluid known as bile. Liver releases Bile into Gall Bladder, a small, pearshaped organ located just below your liver in the upper right side of your abdomen. |
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| 141. |
Green spinach comprises in abundance |
| A. | Vitamin A |
| B. | Vitamin B |
| C. | Vitamin C |
| D. | All options are correct |
| Answer» D. All options are correct | |
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Explanation: Green Spinach (Spinacia oleraceae) is a treasure house of pigments, vitamins, minerals and phytonutrients. |
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| 142. |
Cooking oil can be converted into vegetable ghee by the process of |
| A. | oxidation |
| B. | hydrogenation |
| C. | distillation |
| D. | crystalisation |
| Answer» B. hydrogenation | |
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Explanation: An example of an alkene addition reaction is a process called hydrogenation. In a hydrogenation reaction, two hydrogen atoms are added across the double bond of an alkene, resulting in a saturated alkane. |
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| 143. |
The deficiency of Vitamin B causes - |
| A. | Scurvy |
| B. | Dermatitis |
| C. | Beri - Beri |
| D. | Phynoderma |
| Answer» C. Beri - Beri | |
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Explanation: Beriberi is a nervous system ailment caused by a thiamine (vitamin B 1) deficiency in the diet. Thiamine is involved in the breakdown of molecules such as glucose and is also found on the membranes of neurons. Symptoms of beriberi include severe lcthari and fatigue, together with complications affectingthe cardiovascular, nervous, muscular, and gastrointestinal systems. |
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| 144. |
In which vertebrate oxygenated and deoxygenated blood gets mixed |
| A. | Fish |
| B. | Amphibian |
| C. | Bird |
| D. | Mammal |
| Answer» B. Amphibian | |
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Explanation: If the oxygenated blood and deoxygenated blood mixed, then blood would circulate through the body without being fully oxygenated. Also the deoxygenated blood is supposed to take that trip through the lungs to give up the carbon dioxide. |
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| 145. |
What is the chemical name of vitamin E? |
| A. | Calciferol |
| B. | Tocopherol |
| C. | Riboflavin |
| D. | Phylloquinone |
| Answer» B. Tocopherol | |
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Explanation: Of the many different forms of vitamin E, gamma-tocopherol (γ-tocopherol) is the most common form found in the North American diet, but alpha-tocopherol (α- tocopherol) is the most biologically active. |
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| 146. |
Who is commonly known as "the Father of Microbiology"? |
| A. | Robert Hooke |
| B. | Antonie Philips van Leeuwenhoek |
| C. | Carl Linnaeus |
| D. | Charles Darwin |
| Answer» B. Antonie Philips van Leeuwenhoek | |
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Explanation: Antonie Phillips van Leewenhoek circa1759 is known as the father of microbiology and the microscope due to his early study of bacteria. |
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| 147. |
Commonest mammal is |
| A. | Elephant |
| B. | Lion |
| C. | Man (ho*mo sapiens) |
| D. | Panther |
| Answer» C. Man (ho*mo sapiens) | |
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Explanation: 0 |
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| 148. |
Lungs are the primary organs of |
| A. | Digestion |
| B. | Constipation |
| C. | Perspiration |
| D. | Respiration |
| Answer» D. Respiration | |
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Explanation: The lungs are the primary organs of respiration in humans and many other animals including a few fish and some snails. |
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| 149. |
Lac is produced from - |
| A. | atree |
| B. | an insect |
| C. | an cat |
| D. | amuskrat |
| Answer» B. an insect | |
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Explanation: Lac is the scarlet resinous secretion of a number of species of insects, namely some of the species of the genera Metatachardia, Laccifer, Tachordiella, Austrotacharidia, Afrotac-hardina, and Tachardina of the superfamily Coccoidea, of which the most commonly cultivated species is Kerria lacca. |
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| 150. |
Which organ of the body never rests? |
| A. | Muscles |
| B. | Nerves |
| C. | Tongue |
| D. | Heart |
| Answer» D. Heart | |
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Explanation: Heart is the only organ in the body which never rest throughout the entire life. The heart is a hollow muscle that pumps blood throughout the blood vessels by repeated, rhythmic contractions. It is found in all animals with a circulatory system (including all vertebrates). The vertebrate heart is principally composed of cardiac muscle and connective tissue. The average human heart, beating at 72 beats per minute, will beat approximately 2.5 billion times during an average 66 year lifespan. |
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| 151. |
The presence of what distinguishes a plant cell from an animal cell’? |
| A. | Chloroplasts |
| B. | Cell wall |
| C. | Cell membrane |
| D. | Nucleus |
| Answer» A. Chloroplasts | |
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Explanation: Plant and animal cells have several differences and similarities. Animal cells do not have chloroplasts but plant cells do. Animal cells are round and irregular in shape while plant cells have fixed, rectangular shapes. Chloroplasts are organelles found in plant cells and other eukaryotic organisms that conduct photosynthesis and other chemical reactions. Chloroplasts capture the sun's light energy, store it in the energy storage molecules ATP and NADPH and use it in the process called photosynthesis to make organic molecules from carbon dioxide and free oxygen from water. |
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| 152. |
What is the number of chromosomes in a normal human body cell? |
| A. | 43 |
| B. | 44 |
| C. | 45 |
| D. | 46 |
| Answer» D. 46 | |
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Explanation: A chromosome is an organized structure of DNA and protein found in cells. It is a single piece of coiled DNA containing many genes, regulatory elements and other nucleotide sequences. Chromosomes also contain DNA- bound proteins, which serve to package the DNA and control its functions. Human cells have 23 Pairs of chromosomes (22 pairs of autosomes and one pair of sex chromosomes), giving a total of 46 per cell. |
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| 153. |
Xerophthalmia is a deficiency disease caused by lack of - |
| A. | Vitamin A |
| B. | Vitamin B |
| C. | Vitamin C |
| D. | Vitamin D |
| Answer» A. Vitamin A | |
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Explanation: Xerophthalmia is a medical condition in which the eye fails to produce tears. It may be caused by a deficiency in vitamin A and is sometimes used to describe that lack, although there may be other causes. Xerophthalmia caused by a severe vitamin A deficiency is described by pathologic dryness of the conjunctiva and cornea. The conjunctiva becomes dry, thick and wrinkled. If untreated, it can lead to corneal ulceration and ultimately to blindness as a result of corneal damage. |
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| 154. |
An ant can see the objects all around it due to the presence of – |
| A. | Simple Eyes |
| B. | Eyes over the head |
| C. | Well-developed eyes |
| D. | Compound eyes |
| Answer» D. Compound eyes | |
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Explanation: Compound eyes are found among the arthropods and are composed of many simple facets which, depending on the details of anatomy, may give either a single pixilated image or multiple images, per eye. Each sensor has its own lens and photosensitive cell(s). Some eyes have up to 28,000 such sensors, which are arranged hexagonally, and which can give a full 360° field of vision. Compound eyes are very sensitive to motion. With each eye viewing a different thing, a fused image from all the eyes is produced in the brain, providing very different, high-resolution images. |
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| 155. |
Which among the following does not have a cell wall? |
| A. | Euglena |
| B. | Paramecium |
| C. | Gonyaulax |
| D. | Mycoplasma |
| Answer» D. Mycoplasma | |
|
Explanation: Mycoplasma is a genus of bacteria that lacks a cell wall around their cell membrane Without a cell wall, they are unaffected by many common antibiotics such as penicillin or other beta-lactam antibiotics that target cell wall synthesis. |
|
| 156. |
Hemophilia is – |
| A. | caused by bacteria |
| B. | caused by virus |
| C. | caused by pollutants |
| D. | a hereditary defect |
| Answer» D. a hereditary defect | |
|
Explanation: Hemophilia is a rare disorder in which your blood doesn't clot normally because it lacks sufficient bloodclotting proteins (clotting factors). |
|
| 157. |
Jonas Salk invented the vaccine for - |
| A. | Polio |
| B. | Hepatitis |
| C. | Typhoid |
| D. | Cholera |
| Answer» A. Polio | |
|
Explanation: Jonas Edward Salk was an American medical researcher and virologist, best known for his discovery and development of the first polio vaccine. The field trial set up to test the vaccine developed by Salk and his research team was the most elaborate program of its kind in history, involving 20,000 physicians and public health officers, 64,000 school personnel, and 220,000 volunteers," with over 1,800,000 school children participating in the trial. On April 12, 1955, Dr. Thomas Francis, Jr., of the University of Michigan, the monitor of the test results, "declared the vaccine to be safe and effective." |
|
| 158. |
Cancer is a disease where we find uncontrolled - |
| A. | cell division |
| B. | cell swelling |
| C. | cell inflammation |
| D. | cell deformity |
| Answer» A. cell division | |
|
Explanation: Cancer is the uncontrolled growth of abnormal cells in the body. Cancerous cells are also called malignant cells. Symptoms of cancer depend on the type and location of the cancer. Cancer grows out of normal cells in the body. Normal cells multiply when the body needs them, and die when the body doesn't need them. Cancer appears to occur when the growth of cells in the body is out of control and cells divide too quickly. It can also occur when cells forget how to die. The most common cause of cancer-related death is lung cancer. |
|
| 159. |
Which among the following carries impure blood to human heart? |
| A. | Aorta |
| B. | Pulmonary vein |
| C. | Pulmonary arteries |
| D. | Vena Cava |
| Answer» C. Pulmonary arteries | |
|
Explanation: A pulmonary artery is an artery in the pulmonary circulation that carriesdeoxygenated blood from the right side of the heart to the lungs. |
|
| 160. |
In human beings, the digestion of proteins starts in which part of the alimentary canal? |
| A. | Mouth |
| B. | Stomach |
| C. | Doudenum |
| D. | Ileum |
| Answer» B. Stomach | |
|
Explanation: The stomach secretes acid and enzymes that digest food. Ridges of muscle tissue called rugae line the stomach. |
|
| 161. |
Jaundice is a symptom of disease of - |
| A. | Kidney |
| B. | Liver |
| C. | Pancreas |
| D. | Thyroid |
| Answer» B. Liver | |
|
Explanation: Jaundice is a yellowish pigmentation of the skin, the conjunctival membranes over the sclerae (whites of the eyes), and other mucous membranes caused by hyperbilirubinemia (increased levels of bilirubin in the blood). This hyperbilirubinemia subsequently causes increased levels of bilirubin in the extracellular fluid. Concentration of bilirubin in blood plasma does not normally exceed 1 mgiclI, (>17pmol/L). concentration higher than 1.8 mg/dI, (>30prnol/L) leads to jaundice. |
|
| 162. |
The vaccination against small pox involves the introditetion of - |
| A. | killed germs |
| B. | weakened germs |
| C. | live antibodies |
| D. | activated germs |
| Answer» B. weakened germs | |
|
Explanation: The smallpox vaccine was the first successful vaccine to be developed. The process of vaccination was first publicized byEdward Jenner in 1796, who acted upon his observation that milkmaids who caught the cowpox virus did not catch smallpox. The vaccine consists of the virus which causes the related, yet far milder, cowpox disease; this virus is named vaecinia (the term vaccine is derived from it), from the Latin vacca which means cow. This vaccine has functional viruses in it. Vaccines generally consist of a weakened (attenuated) or killed antigens, associated with a particular disease that are capable of stimulating the body to make specific antibodies to that disease. |
|
| 163. |
Haemophilia is a genetic disorder which lead to – |
| A. | decrease in haemoglobin level |
| B. | rheumatic heart disease |
| C. | decrease in WBC |
| D. | non-clotting of blood |
| Answer» D. non-clotting of blood | |
|
Explanation: Haemophilia is a mostly inherited genetic disorder that impairs the body's ability to make blood clots, a process needed to stop bleeding. |
|
| 164. |
'Mangifera indica' is the phylum of – |
| A. | Guava |
| B. | Mango |
| C. | Amla |
| D. | Jack fruit |
| Answer» B. Mango | |
|
Explanation: Mangifera indica is commonly known as mango. If is found in the wild in Bangladesh. |
|
| 165. |
Typhoid is caused by - |
| A. | Pseudomonas sp. |
| B. | Staphylococcus |
| C. | Bacillus |
| D. | Salmonella typhi |
| Answer» D. Salmonella typhi | |
|
Explanation: Typhoid fever, also known as typhoid, is a common worldwide bacterialdisease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella typhi, serotype Typhi. Salmonella enteric is a subspecies of Salmonella enterica, the rod shaped, flagellated, aerobic, Gram-negative bacterium. It is a member of the genus Salmonella. |
|
| 166. |
BCG immunization is for - |
| A. | Measles |
| B. | Tuberculosis |
| C. | Diphtheria |
| D. | Leprosy |
| Answer» B. Tuberculosis | |
|
Explanation: Bacillus Calmette-Guerin (BCG) is a vaccine against tuberculosis that is prepared from a strain of the attenuated (weakened) live bovine tuberculosis bacillus, Mycobacterium bovis, that has lost its virulence in humans by being specially subcultured in an artificial medium for 13 years, and also prepared from Mycobacterium tuberculosis. |
|
| 167. |
Which of the following crops is not harvested in March April? |
| A. | Paddy |
| B. | Wheat |
| C. | Mustard |
| D. | All of the above |
| Answer» A. Paddy | |
|
Explanation: Rice (paddy) is a Kharif crop that is sown in the beginning and harvested by the end of the monsoon season, the cultivation period being July to November. |
|
| 168. |
The noble has used for the treatment of cancer is - |
| A. | Helium |
| B. | Argon |
| C. | Krypton |
| D. | Radon |
| Answer» D. Radon | |
|
Explanation: Radon was once commonly used to treat cancer. The radiation it gives off kills cancer cells. However, the element must be used with great care because radiation can kill healthy cells as well. In fact, the bad side-effects of radiation therapy are caused by the killing of healthy cells by radiation. Today, radon is not as widely used for the treatment of cancer. Radon is a radioactive element. |
|
| 169. |
Bt seed is associated with - |
| A. | Rice |
| B. | Wheat |
| C. | Cotton |
| D. | Oil seeds |
| Answer» C. Cotton | |
|
Explanation: Cotton is the most popular of the Bt crops: it was planted on about 1 .8 million acres (728437 ha) in 1996 and 1997. The Bt gene was isolated and transferred from a bacterium bacillus thurigiensis to American cotton. The American cotton was subsequently crossed with Indian cotton to introduce the gene into native varieties. The Bt cotton variety contains a foreign gene obtained from bacillus thuringiensis. This bacterial gene, introduced genetically into the cotton seeds, protects the plants from bollworm (A. lepidoptora), a major pest of cotton. |
|
| 170. |
Leukaemia or blood cancer is characterised by abnormal increase of the – |
| A. | Red blood cells |
| B. | White blood cells |
| C. | Blood platelets |
| D. | Blood plasma |
| Answer» B. White blood cells | |
|
Explanation: Leukemia is a type of cancer of the blood or bone marrow characterized by an abnormal increase of immature white blood cells called "blasts". Damage to the bone marrow, by way of displacing the normal bone marrow cells with higher numbers of immature white blood cells, results in a lack of blood platelets, which are important in the blood clotting process. This means people with leukemia may easily become bruised, bleed excessively, or develop pinprickbleeds (petechiae). White blood cells, which are involved in fighting pathogens, may be suppressed or dysfunctional. |
|
| 171. |
Which of the following techniques can be used to establish the paternity of a child? |
| A. | Protein analysis |
| B. | Chromosome counting |
| C. | Quantitative analysis of DNA |
| D. | DNA finger printing |
| Answer» D. DNA finger printing | |
|
Explanation: 0 |
|
| 172. |
In `Scorpion' poison is present in the - |
| A. | leg |
| B. | hand |
| C. | mouth |
| D. | sting |
| Answer» D. sting | |
|
Explanation: Scorpions are predatory arthropod animals which are easily recognized by the pair of grasping claws and the narrow, segmented tail, often carried in a characteristic forward curve over the back, ending with a venomous stinger. All known scorpion species possess venom and use it primarily to kill or paralyze theirprey. This venom is present in their stings. |
|
| 173. |
The total number of bones in man is - |
| A. | 212 |
| B. | 206 |
| C. | 202 |
| D. | 200 |
| Answer» B. 206 | |
|
Explanation: A typical adult human skeleton consists of 206 bones. These include: 22 Cranial and Facial Bones; 6 Ear Bones; 1 Throat Bone; 4 Shoulder Bones; 25 Chest Bones: 26 Vertebral. Bones; 6 Arm and Forearm bones; 54 Hand Bones; 2 Pelvic Bones; 8 Leg Bones; and 52 Foot Bones. |
|
| 174. |
The number of heart beats on an average in an adult human is in the range of |
| A. | 60-65 |
| B. | 66-70 |
| C. | 71-80 |
| D. | 8590 |
| Answer» C. 71-80 | |
|
Explanation: The average heart rate for adult humans is about 70 to 75 beats per minute in a normal relaxed mode. While we tend to think of the "normal" heart beat rate as being "72 beats per minute", in actuality the heart beat rate is not and should not be constant. |
|
| 175. |
The end product of the digestion of starch in the alimentary canal is — |
| A. | glucose |
| B. | galactose |
| C. | maltose |
| D. | isomaltose |
| Answer» A. glucose | |
|
Explanation: Starch or amylum is a carbohydrate consisting of a large number of glucose units joined by glycosidic bonds. Sugar from molasses or sugarcane, fruits or starch is first converted to glucose and fructose in presence of an enzyme called invertase.' |
|
| 176. |
The balance of CO2 and O2 in atmosphere is due to . |
| A. | Transportation |
| B. | Photosynthesis |
| C. | Respiration |
| D. | Evaporation |
| Answer» B. Photosynthesis | |
|
Explanation: Photosynthesis takes in the carbon dioxide produced by all breathing organisms and reintroduces oxygen into the atmosphere. |
|
| 177. |
Which of the following vitamin combines with avid in contained in egg-white forming a compound that cannot be absorbed by the intestine and is therefore, excreted – |
| A. | vitamin B₂ |
| B. | vitamin B₃ |
| C. | vitamin B₇ |
| D. | vitamin A |
| Answer» C. vitamin B₇ | |
|
Explanation: 0 |
|
| 178. |
Bark of this tree is used as' a condiment – |
| A. | Cinnamon |
| B. | Clove |
| C. | Neem |
| D. | Palm |
| Answer» A. Cinnamon | |
|
Explanation: Cinnamon is a spice obtained from the inner bark of several trees from the genus Cinnamomum that is used in both sweet and savoury foods. The bark must be processed immediately after harvesting while still wet. Once processed, the bark will dry completely in four to six hours, provided that it is in a wellventilated and relatively warm environment. Sri Lanka cinnamon has a very thin, smooth bark with a light-yellowish brown colour and a highly fragrant aroma. |
|
| 179. |
Synapse gap is present between which of the following? |
| A. | Two neurons |
| B. | Brain and Spinal Cord |
| C. | Two Kidneys |
| D. | None of these |
| Answer» A. Two neurons | |
|
Explanation: The gap between the two neurons is called the synapse. It is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another neuron. |
|
| 180. |
The acid contained in vinegar is – |
| A. | Acetic acid |
| B. | Ascorbic acid |
| C. | Citric acid |
| D. | Tartaric acid |
| Answer» A. Acetic acid | |
|
Explanation: Table vinegar typically contains between 4 and 8 % acetic acid (ethanoic acid). |
|
| 181. |
Which one of the following is used to remove Astigmatism for a human eye? |
| A. | Concave lens |
| B. | Convex lens |
| C. | Cylindrical lens |
| D. | Prismatic lens |
| Answer» C. Cylindrical lens | |
|
Explanation: In Astigmatism, eye cannot see objects in two orthogonal directions clearly simultaneously. This abnormality is removed by using cylindrical lens. |
|
| 182. |
Besides carbohydrates, a major source of energy in our food is constituted by |
| A. | Proteins |
| B. | Fats |
| C. | Minerals |
| D. | Vitamins |
| Answer» B. Fats | |
|
Explanation: Fats consist of a wide group of compounds that are generally soluble in organic solvents and generally insoluble in water. Chemically, fats are triglycerides, ft-jesters of glycerol and any of several fatty acids. Fats provide a source of concentrated energy as well as the fat-soluble vitamins A, D, E and K. Fat transports these vital nutrients around the body. Fats or lipids are broken down in the body by enzymes called lipases produced in the pancreas. Examples of edible animal fats are lard, fish oil, butter/ghee and whale blubber. |
|
| 183. |
The limb bones of children become bent if there is deficiency of vitamin - |
| A. | A |
| B. | B1 |
| C. | D |
| D. | E |
| Answer» C. D | |
|
Explanation: Rickets is weakness and deformity of the bones that occurs from lack of vitamin D. Vitamin D occurs in whole milk, butter, egg yolks, animal fats, and liver, especially fish liver oil. The body also makes its own vitamin D when sunlight shines on the skin. Children who do not eat enough foods with vitamin D, and who do not get enough sunlight, gradually develop signs of rickets. |
|
| 184. |
Which of the following diseases is NOT caused by the smog? |
| A. | Asthma |
| B. | Throat Cancer |
| C. | Emphysema |
| D. | Breathing problem |
| Answer» B. Throat Cancer | |
|
Explanation: Throat cancer can start in the oesophagus (food pipe), larynx (voice box), thyroid gland or cells lining the throat (squamous cells). |
|
| 185. |
Too much consumption of tea or coffee can result in deficiency of – |
| A. | Vitamin B12 |
| B. | Calcium |
| C. | Vitamin C |
| D. | Albumin |
| Answer» B. Calcium | |
|
Explanation: 0 |
|
| 186. |
Deficiency of Vitamin B6 in man causes |
| A. | rickets |
| B. | scurvy |
| C. | beri-beri |
| D. | anaemia |
| Answer» D. anaemia | |
|
Explanation: Vitamin B6 is a member of the B complex family of vitamins. Known as pyridoxine, its deficiency may lead to microcytic anemia (because pyridoxyl phosphate is the cofactor for heme synthesis), depression, dermatitis, high blood pressure (hypertension), water retention, and elevated levels of homocysteine. Vitamin B6 is found in a wide range of foods, including meat, poultiy, legumes, bananas and foods that are fortified with a supplemental form. Adults need 1.3 to 1.7 milligrams (mg) daily to meet their requirements. |
|
| 187. |
First successful heart, transplantation was done by - |
| A. | D.S. Paintal |
| B. | C.N. Barnard |
| C. | D. Shetty |
| D. | P. K. Sen |
| Answer» B. C.N. Barnard | |
|
Explanation: Christiaan Neethlirig Barnard was a South African cardiac surgeon who performed the world's first successful human-to-human heart transplant. He performed the world's first human heart transplant operation on 3 December 1967, in an operation assisted by his brother, Marius Barnard; the operation lasted nine hours and used a team of thirty people. The patient, Louis Washkansky, was a 54-year-old grocer, suffering from diabetes and incurable heart disease. |
|
| 188. |
Which among the following is also called as 'power house of the cell'? |
| A. | Plastids |
| B. | Mitochondria |
| C. | Golgi bodies |
| D. | Cell wall |
| Answer» B. Mitochondria | |
|
Explanation: The mitochondria is called the powerhouse of the cell because it is responsible for producing most of the cell's energy, or adenosine tri-phosphate (ATP). |
|
| 189. |
Which one of the following pairs belongs to cartilaginous fish? |
| A. | Shark and Tuna |
| B. | Shark and Ray |
| C. | Skates and Hilsa |
| D. | RayandEel |
| Answer» B. Shark and Ray | |
|
Explanation: Chondrichthyes or cartilaginous fishes are jawed fish with paired fins, paired nares, scales, a twochambered heart, and skeletons made of cartilage rather than bone. The cartilaginous fish are so named because their skeleton is composed of cartilage which is not reinforced by the minerals that make bone. It includes elasmobranchs: sharks, rays and skates, etc. |
|
| 190. |
Lac, which is used as sealing wax is produced by - |
| A. | stem |
| B. | root |
| C. | insect |
| D. | bird |
| Answer» C. insect | |
|
Explanation: Lac is the scarlet resinous secretion of a number of species of insects. There are several lac insects, some of which secrete highly pigmented wax. The Indian lac insect Laccifer lacca is important commercially. |
|
| 191. |
Which of the following is a mangroves flora? |
| A. | Spruce |
| B. | Moss |
| C. | Rhizophora |
| D. | Cypress |
| Answer» C. Rhizophora | |
|
Explanation: Rhizophora is a genus of tropical mangrove trees, sometimes collectively called true mangroves. The most notable species is the red mangrove (Rhizophora mangle) but some other species and a few natural hybrids are known. |
|
| 192. |
Which one of the following hormones contains iodine? |
| A. | Thyroxine |
| B. | Testosterone |
| C. | Insulin |
| D. | Adrenaline |
| Answer» A. Thyroxine | |
|
Explanation: Thyroxine is produced by attaching iodine atoms to the ring structures of this protein's tyrosine residues; thyroxine (T4) contains four iodine atoms, while triiodothyronine (T3), otherwise identical to T4, has one less iodine atom per molecule. |
|
| 193. |
What is the approximate time required for a heart-beat? |
| A. | 0.5 second |
| B. | 0.8 second |
| C. | 0.5 minute |
| D. | 1.0 minute |
| Answer» B. 0.8 second | |
|
Explanation: The heart has an increasing rhythmic activity. It pumps blood by its contraction and relaxation. The contraction of the heart is called systole and the relaxation is called diastole. The contraction and relaxation together constitute the heart beat. The heart beats at the rate of 72 beats per minute. There are 3 main events in the cardiac cycle. Auricular Systole (Atrial Systole) phase involves the contraction of the 2 auricles, pushing the blood into the respective ventricles. The atrial systole takes 0.1 second. Ventricular Systole takes about 0.3 seconds. Ventricular systole is followed by ventricular diastole. |
|
| 194. |
Who discovered the Cholera-bacillus? |
| A. | Louis Pasteur |
| B. | Ronald Ross |
| C. | Robert Koch |
| D. | Joseph Lister |
| Answer» C. Robert Koch | |
|
Explanation: Robert Kach was a German physician. He became famous for isolating Bacillus anthracis 8 7, the Tuberculosis bacillus (1882) and Vibrio cholerae (1883) and for his development of Koch's postulates. He was awarded the Nobel Prize in Physiology or Medicine in 1905 for his tuberculosis findings. He is considered one of the founders of microbiology. |
|
| 195. |
Out of the following glands which is referred to as the master gland? |
| A. | Thyroid |
| B. | Adrenal gland |
| C. | Pituitary |
| D. | Pancreas |
| Answer» C. Pituitary | |
|
Explanation: The pituitary gland is a peasized gland located at the base of the skull between the optic nerves. The pituitary gland secretes hormones. Hormones are chemicals that travel through our blood stream. The pituitary is sometimes referred to as the "master gland" as it controls hormone functions such as our temperature, thyroid activity, growth during childhood, urine production, testosterone production in males and ovulation and estrogen production in females. |
|
| 196. |
Which of the following is most important for growth of children upto the age of 14? |
| A. | Proteins |
| B. | Vitamins |
| C. | Fats |
| D. | Milk |
| Answer» A. Proteins | |
|
Explanation: Proteins are very important for children as they help their body grow. Proteins are the source of amino acids, which are the building blocks of your child's body. Amino acids help the development of muscle, bones, skin and various organs in children. The enzymes which are catalysts of body growth are proteins produced by the body. As children grow, their immune system also keeps improving and maturing. |
|
| 197. |
Which of the following is not required for seed germination’? |
| A. | Water |
| B. | Air |
| C. | Sunlight |
| D. | Suitable temperature |
| Answer» C. Sunlight | |
|
Explanation: Plants need sunlight to conduct the carbohydrate-making process called photosynthesis in their green leaves and stems. Seeds do not contain green pigment, but merely a dormant embryo. Seeds do not need to bask in sunlight to germinate. However, the warmth frorri sunlight can create a soil environment more, conducive for gemination. The requirements for seed germination vary among all plant species. |
|
| 198. |
Oxygen liberated during photo- synthesis is coming from : |
| A. | Carbon dioxide |
| B. | Water |
| C. | Bresk down of chlorophy II |
| D. | Atmosphere |
| Answer» B. Water | |
|
Explanation: Oxygen liberated during photosynthesis is coming m6t.o create a stable, unstirred layer to support surface neutralization of acid and act as a protective physical barrier against luminal pepsin. |
|
| 199. |
Which of the following is NOT included in the Technology Mission? |
| A. | Oil seeds |
| B. | Pulses |
| C. | Maize |
| D. | Vegetables |
| Answer» D. Vegetables | |
|
Explanation: 0 |
|
| 200. |
Founder of Homeopathy is - |
| A. | SamuelHahnemann |
| B. | Hippocrates |
| C. | Charaka |
| D. | Sushrutha |
| Answer» A. SamuelHahnemann | |
|
Explanation: Homeopathy is a system of alternative medicine originated in 1796 by Samuel Hahnemann, based on his doctrine of similia aim.' 'bus curentur ("like cures like"), according to which a substance that causes the symptoms of a disease in healthy people will cure that disease in sick people. Homeopathy is a vita list philosophy that interprets diseases and sickness as caused by disturbances in an immaterial vital force or life force. Disturbances are believed to manifest themselves first in mental symptoms, and eventually progress to physical disease if untreated. |
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