McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: General Knowledge (GK) .
| 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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