McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: General Knowledge (GK) .
| 1051. |
The hydrophilic nature of DNA is due to the presence of - |
| A. | thymine base |
| B. | a number of hydrogen bonds |
| C. | phosphate group |
| D. | deoxyribose sugar |
| Answer» B. a number of hydrogen bonds | |
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Explanation: The phosphate groups on DNA are ionic and charged. Each phosphate group on the DNA back-bone is one unit of negative charge (-1). Charged molecules attract water and are hydrophilic. DNA has two hydrophilic polar external backbones made of sugars and phosphate groups joined by ester bonds. |
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| 1052. |
Which of the following is used in the treatment of cancer? |
| A. | Physiotherapy |
| B. | Chemotherapy |
| C. | Electrotherapy |
| D. | Psychotherapy |
| Answer» B. Chemotherapy | |
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Explanation: Chemotherapy (or CTX) is a category of cancer treatment that uses chemical substances, especially one or more anti-cancer drugs (chemotherapeutic agents) that are given as part of a standardized chemotherapy regimen. Traditional chemotherapeutic agents are cytotoxic, that is to say they act by killing cells that divide rapidly, one of the main properties of most cancer cells. |
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| 1053. |
Which one of these animals is jawless - |
| A. | Sphyrna |
| B. | Trygon |
| C. | Myxine |
| D. | Shark |
| Answer» C. Myxine | |
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Explanation: Myxine is a species of jawless fish. It is known as Hag fish in Europe. These are generally classified with the lampreys into the superclass Agnatha (law-less vertebrates) within the subphylum Vertebrata. All other living fishes (shark, rays, chimeras and bony fishes) possess true jaws derived from gill arches and are placed in the superclass Gnathostomata. |
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| 1054. |
Minamata disease is caused by pollution of water by - |
| A. | lead |
| B. | tin |
| C. | methy isocyanate |
| D. | mercury |
| Answer» D. mercury | |
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Explanation: Minamata disease is a neurological syndrome caused by severe mercury poisoning. The disease was first discovered in Minamata City in Kumamoto prefecture, Japan in 1956. It was caused by the release of methyl mercury in the industrial waste water (point source pollution) from the Chisso Corpora-tion's chemical factory, which continued from 1932 to 1968. |
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| 1055. |
Commercially valued cork is obtained from - |
| A. | Quercus spp |
| B. | Cedrus Deodara |
| C. | Ficus |
| D. | Cycas |
| Answer» A. Quercus spp | |
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Explanation: Cork is a prime-subset of bark tissue that is harvested for commercial use primarily from Quercus suber. It is endemic to the Mediterranean region. Cork is composed of suberin, a hydrophobic sub-stance and, because of its impermeable, buoyant, elastic, and fire retardant properties, it is used in a variety of products, such as wine stoppers. |
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| 1056. |
Which of the following human genetic disorders is sexlinked? |
| A. | Haemophilia |
| B. | Cystic fibrosis |
| C. | Albinism |
| D. | PKU |
| Answer» A. Haemophilia | |
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Explanation: Haemophilia is a group of hereditary genetic disorders that impairs the body's ability to control blood clotting, which is used to stop bleeding when a blood vessel isbroken. It is a sex-linked recessive disorder which is more likely to occur in males than females. |
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| 1057. |
Golden Revolution in India refers to growth of - |
| A. | Militancy in the northeast |
| B. | Oilseeds production |
| C. | Horticulture |
| D. | Increased importing of gold |
| Answer» B. Oilseeds production | |
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Explanation: The government's efforts to increase production of fruits, honey and horticultural development is referred to as Golden Revolution. Oil Seeds production is related to Yellow Revolution. |
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| 1058. |
Eustachian Tube, is located in which part of human body? |
| A. | Nose |
| B. | Ear |
| C. | Eyes |
| D. | Throat |
| Answer» B. Ear | |
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Explanation: The Eustachian Tube is a tube that links the nasopharynx to the middle ear. It is a part of the middle ear. The Eustachian tube connects from the chamber of the middle ear to the back of the nasopharynx. It is named after the 16th century anatomist Bartolomeo Eustachi. |
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| 1059. |
Which part of the brain plays an important role in motor control? |
| A. | Cerebellum |
| B. | Cerebrum |
| C. | Medulla |
| D. | Pons |
| Answer» A. Cerebellum | |
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Explanation: The cerebellum, also known as little brain, is a region of the brain that plays an important role in balance and motor control. It is also involved in some cognitive functions such as attention, language, emotional functions(such as regulating fear and plea-sure responses) and in the processing of procedural memories. |
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| 1060. |
Which of the following vitamins help in the absorption of calcium? |
| A. | Vitamin A |
| B. | Vitamin D |
| C. | Vitamin B |
| D. | Vitamin C |
| Answer» B. Vitamin D | |
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Explanation: Vitamin D is essential in helping the body absorb and use calcium; in fact, the body cannot absorb calcium at all without some vitamin D. Vitamin D helps our intestines absorb calcium from the food we eat and helps build stronger bones, partly by increasing the absorption of calcium. |
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| 1061. |
Which of the following vitamins contain nitrogen? |
| A. | Vitamin A |
| B. | Vitamin B |
| C. | Vitamin C |
| D. | Vitamin D |
| Answer» B. Vitamin B | |
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Explanation: Vitamin B contains nitrogen atoms that allow them to participate in regulating metabolism. For example, Vitamin B3 is a water soluble vitamin containing compound Niacin or Niacinamide, a nitrogen containing vitamin. |
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| 1062. |
If waste materials contaminate the source of drinking water, which of the following diseases will spread? |
| A. | Scurvy |
| B. | Typhoid |
| C. | Malaria |
| D. | Anaemia |
| Answer» B. Typhoid | |
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Explanation: Typhoid is a systemic infection caused by Salmonella Typhi, usually through ingestion of contaminated food or water. Typhoid is spread by eating or drinking food or |
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| 1063. |
Pneumonia is a bacterial disease caused by the type of bacteria called . |
| A. | Bacilli |
| B. | Cocci |
| C. | Sprilli |
| D. | Vibrio |
| Answer» B. Cocci | |
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Explanation: Pneumonia is a bacterial disease caused by pneumoniae, a Gram-positive bacterium. It lives in the noses and throats of healthy people and can enter lungs through inhalation. Other important Gram-positive causes of pneumonia are Staphylococcus aureus and Bacillus anthracis. |
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| 1064. |
"Alfalfa" is the name of a - |
| A. | Mineral |
| B. | Tribe |
| C. | Grass |
| D. | Town |
| Answer» C. Grass | |
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Explanation: Alfalfa, also called lucerne, is a perennial flower-frig plant in the pea family Fabaceae cultivated as an important forage crop in many countries around the world. It is used for grazing, hay, and silage, as well as a green manure and cover crop. Alfalfa is generally referred to as grass. |
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| 1065. |
Chlorophyll was first isolated and named by - |
| A. | Caventou |
| B. | Pelletier |
| C. | Chlorophyll |
| D. | Caventou and Pelletier |
| Answer» D. Caventou and Pelletier | |
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Explanation: Chlorophyll was first isolated and named by Joseph Bienaime Caventou and Pierre Joseph Pelletier in 1817. It is a chemical found in the chloroplasts of plants that allows the plantto absorb light. Energy from the light is used in photosynthesis to make glucose. |
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| 1066. |
Which of the following organ-isms does not fit into the Cell Theory? |
| A. | Bacteria |
| B. | Virus |
| C. | Fungi |
| D. | Plants |
| Answer» B. Virus | |
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Explanation: The cell theory states that all living things are made of cells, cells are the basic units of structure and function of living things, and that all cells come from other cells. Since viruses are not made of cells, and do not use cells in any of their processes, they are not related to the cell theory. |
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| 1067. |
Which of the following is an example of conjugated protein? |
| A. | Albumin |
| B. | Globulin |
| C. | Glutelin |
| D. | Glycoprotein |
| Answer» D. Glycoprotein | |
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Explanation: A conjugated protein is a protein that functions in interaction with other (non- polypeptide) chemical groups attached by covalent bonding or weak interactions. |
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| 1068. |
The exchange of gases takes place in the leaves through these pores for the purpose of photosynthesis. These pores are called – |
| A. | Guard Cells |
| B. | Stomata |
| C. | Chloroplast |
| D. | None of the above |
| Answer» B. Stomata | |
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Explanation: Stomata are tiny pores present on the surface of the leaves via which exchange of gases takes place in the leaves for the purpose of photosynthesis. However, exchange of gases also occurs across the surface of stems, roots and leaves as well. |
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| 1069. |
Goitre is caused by the deficiency of |
| A. | Zinc |
| B. | Calcium |
| C. | Iodine |
| D. | Chlorine |
| Answer» C. Iodine | |
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Explanation: Goitre is a swelling of the neck or larynx resulting from enlargement of the thyroid gland, associated with a thyroid gland that is not functioning properly. Worldwide, over 90% cases of goitre are caused by iodine deficiency. Prevention includes adding small amounts of iodine to table salt, a product known as iodized salt. |
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| 1070. |
Which part of brain is also known as "little brain"? |
| A. | Cerebrum |
| B. | Cerebellum |
| C. | Thalamus |
| D. | Hypothala mus |
| Answer» B. Cerebellum | |
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Explanation: The cerebellum is known as little brain. It is a region of the brain that plays an important role in motor control. It may also be involved in some cognitive functions such as attention and language, and in regulating fear and pleasure responses, but its movement- related functions are the most solidly established. |
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| 1071. |
Which organism is responsible for alcohol fermentation? |
| A. | Chlorella |
| B. | Yeast |
| C. | Agaricus |
| D. | Puccinia |
| Answer» B. Yeast | |
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Explanation: Ethanol fermentation, also called alcoholic fermentation, is a biological process which converts sugars such as glucose, fructose, and sucrose into cellular energy, producingethanol and carbon dioxide as a side-effect. It is an anaerobic process since Yeasts perform this conversion in the absence of oxygen. |
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| 1072. |
Polio is caused by - |
| A. | Bacteria |
| B. | Virus |
| C. | Fungus |
| D. | Protozoa |
| Answer» B. Virus | |
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Explanation: Poliomyelitis, often called polio or infantile paralysis, is an infectious disease caused by the poliovirus, Poliovirus is usually spread from person to person through infected fecal matter entering the mouth. It may also be spread by food or water containing human feces and less commonly from infected saliva. |
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| 1073. |
Copper is associated with mitochondria' enzymes. |
| A. | Cytochrome oxidase |
| B. | Succinic dehydrogenase |
| C. | Catalase |
| D. | Acid phosphatase |
| Answer» A. Cytochrome oxidase | |
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Explanation: Copper is involved in normalized function of many enzymes, such as cytochrome oxidase, which is complex IV in mitochondrial electron transport chain, ceruloplasmin, Cu/Zn superoxide dismutase, and in amine oxidases. These enzymes catalyze reactions for oxidative phosphorylation, iron transportation, antioxidant and free radical scavenging and neutralization, and neurotransmitter synthesis, respectively. |
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| 1074. |
Metals can be temperature. |
| A. | Liquid only |
| B. | Solid only |
| C. | Solid or liquid |
| D. | Solid, liquid or gasat room |
| Answer» C. Solid or liquid | |
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Explanation: All metals except Mercury are solid at room temperature. Mercury is the only |
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| 1075. |
Red rot of sugarcane is caused by - |
| A. | Alternaria alternata |
| B. | Phylophthora infestans |
| C. | Colletotrichum falcaturn |
| D. | Cercospora personata |
| Answer» C. Colletotrichum falcaturn | |
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Explanation: Red rot disease is caused by the fungus Glomerella tucurnanensis. An older name, Colletotrichum falcatum, is still preferred by some pathologists. Red rot occurs in various parts of the cane plant but it is usually considered a stalk and a seed-piece disease. Its symptoms are highly variable depending upon the susceptibility of the sugarcane variety and the environment. |
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| 1076. |
The fleshy thalamus is edible in - |
| A. | Apple |
| B. | Tomato |
| C. | Orange |
| D. | Mango |
| Answer» A. Apple | |
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Explanation: Apple is a pome, a simple, fleshy but false fruit as it is surrounded by a fleshy thalamus which is edible while actual fruit lies within other examples are pear, loquat, etc. |
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| 1077. |
Bacterial cells do not have - |
| A. | Cell wall |
| B. | Plasma membrane |
| C. | Ribosome |
| D. | Mitochondria |
| Answer» D. Mitochondria | |
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Explanation: Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Bacteria are prokaiyotes, which, by definition, are cells that don't possess membrane-bound organelles. Mitochondria are membrane-bound organelles.(3) 70-80 times per second |
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| 1078. |
A cellulosic wall is found in the cells of - |
| A. | animals |
| B. | bacteria |
| C. | fungi |
| D. | plants |
| Answer» D. plants | |
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Explanation: Cellulose is an important structural component of the primary cell wall of green plants, many forms of algae and the oomycetes. It is a complex carbohydrate, that is composed of glucose units. |
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| 1079. |
The filtration unit of kidney is - |
| A. | axon |
| B. | nephron |
| C. | neuron |
| D. | yellow fiber |
| Answer» B. nephron | |
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Explanation: Nephron is the basic structural and functional unit of the kidney. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine. |
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| 1080. |
Which of the following is a tapeworm? |
| A. | Fasciola |
| B. | Schistosoma |
| C. | Taenia |
| D. | Enterobius |
| Answer» C. Taenia | |
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Explanation: Taenia is a genus of tapeworm that includes some important parasites of livestock. Members of the genus are responsible for taeniasis and cysticercosis in humans. There are more than 100 species recorded. They are morphologically characterized by a ribbon-like body composed of a series of segments called proglotticis. |
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| 1081. |
Bacteriophage was discovered by - |
| A. | Felix d'Herelle and Frederick Twort |
| B. | Kluyver and Niel |
| C. | Paul Ehrlich |
| D. | Burrill and Smith |
| Answer» A. Felix d'Herelle and Frederick Twort | |
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Explanation: Bacteriophage refers to any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Felix d'Herelle in France (1917). D'Herelle coined the term Bacteriophage, meaning "bacteria eater:. |
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| 1082. |
Genes are not found in pairs - |
| A. | in body cells |
| B. | in ovary after fertilization |
| C. | in gametes |
| D. | in zygotes |
| Answer» C. in gametes | |
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Explanation: Genes are a part of the chromosome and are found in pairs in somatic cells. One member of the gene pair segregates into a gamete, thus each gamete only carries one member of the gene pair. Gametes unite at random and irrespective of the other gene pairs involved. |
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| 1083. |
Which vein brings clean blood from the lungs into the heart? |
| A. | Renal Vein |
| B. | Pulmonary Vein |
| C. | Vena Cava |
| D. | Hepatic Vein |
| Answer» B. Pulmonary Vein | |
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Explanation: The pulmonary veins are a set of veins that deliver clean oxygenated blood from the lungs to the heart. It brings oxygen-rich blood to the left atrium. Systemic veins deliver deoxygenated blood to the heart. |
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| 1084. |
Leaving agricultural land uncultivated for some years known as – |
| A. | Intensive farming |
| B. | Fallowing |
| C. | Shifting cultivation |
| D. | Subsistence farming |
| Answer» B. Fallowing | |
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Explanation: A land that has undergone plowing and harrowing and has been left unseeded for one or more growing seasons is known as fallow and the process as fallowing. |
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| 1085. |
The gametophyte is called prothallus in |
| A. | Pteridophyta |
| B. | Bryophyta |
| C. | Sperrnatophyta |
| D. | Thallophyta |
| Answer» A. Pteridophyta | |
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Explanation: Prothallus is usually the gametophyte stage in the life of a fern or other pteridophyte. The prothallium develops from a germinating spore. It is a short-lived and inconspicuous heart-shaped structure. |
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| 1086. |
The best example of Polyembryony is |
| A. | Cocoa |
| B. | Capsicum |
| C. | Citrus |
| D. | Cycas |
| Answer» C. Citrus | |
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Explanation: In citrus fruits such as oranges, the nuclear cells that surround the embryo start dividing and protrude into the embryo sac. These develop into embryos; thus resulting in the presence of more than one embryo inside each ovule. This condition is known as polyembryony. |
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| 1087. |
The main function of palisade parenchyma in leaf is – |
| A. | Antibiotics |
| B. | Pollutants |
| C. | Hormones |
| D. | Toxins |
| Answer» D. Toxins | |
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Explanation: Palisade parenchyma is the layer of tissue directly beneath the epidermis of the upper surface of a leaf. It contains the cylinder- shaped cells that hold the chloroplasts and constitutes the primary area of photosynthesis that converts the light energy to the chemical energy of carbohydrates |
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| 1088. |
The harmful substances produced by the microbes are known as – |
| A. | Antibiotics |
| B. | Pollutants |
| C. | Hormones |
| D. | Toxins |
| Answer» D. Toxins | |
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Explanation: Toxins are substances created by plants and animals that are poisonous to humans. Most toxins that cause problems in humans are released by microor-ganisms such as bacteria, viruses, fungi, rickettsiae or protozoa. For example, cholera is due to a bacterial toxin. |
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| 1089. |
Which of the following fuels causes minimum environmental pollution? |
| A. | Kerosene |
| B. | Diesel |
| C. | Coal |
| D. | Hydrogen |
| Answer» D. Hydrogen | |
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Explanation: Most of environmental (air) pollution results from the burning of fossil fuels, such as coal, oil, natural gas, and gasoline to produce electricity and power. All these produce harmful CO2 or its variants. On the contrary, when hydrogen burns in air, it produces nothing but water vapor. It is therefore the cleanest possible as it doesn't produce CO2. |
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| 1090. |
Which one of the following is the infective stage of the Malarial Parasite? |
| A. | schigozoite |
| B. | trophozoite |
| C. | sporoblast |
| D. | sporozoite |
| Answer» D. sporozoite | |
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Explanation: When a mosquito sucks the blood of a person who has malaria parasites in his or her blood, the mosquito picks male and female gametocytes where they undergo a series of changes to become sporozoites. The sporozoites are the infective stages of malaria parasites in the mosquito. This process takes about 10 -14 days depending on environmental temperature. |
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| 1091. |
Approximate number of skeletal muscles is : |
| A. | 500 |
| B. | 700 |
| C. | 200 |
| D. | 206 |
| Answer» B. 700 | |
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Explanation: There are approximately 640 skeletal muscles within the typical human, and almost every muscle constitutes one part of a pair of identical bilateral muscles, found on both sides, resulting in approximately 320 pairs of muscles. Nevertheless, the exact number is difficult to define because different sources group muscles differently, e.g. regarding what is defined as different parts of a single muscle or as several muscles. Examples range from 640 to 850. |
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| 1092. |
The Ozone layer protects us from: |
| A. | Cosmic rays |
| B. | Ultra-Violet rays |
| C. | Visible rays |
| D. | Infrared rays |
| Answer» B. Ultra-Violet rays | |
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Explanation: The ozone layer refers to a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UN) radiation. It absorbs 97- 99% of the Sun's medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms near the surface. |
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| 1093. |
Children especially in western countries who receive very little sunshine suffer from – |
| A. | rickets |
| B. | dermatitis |
| C. | scurvy |
| D. | kwashiorkor |
| Answer» A. rickets | |
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Explanation: Children who receive very little sunshine (source of vitamin D) suffer from rickets, a skeletal disorder that results from a lack of vitamin D. Rickets is most common in children who are between 6 and 36 months old. Rickets has mostly disappeared in developed countries due to the introduction of fortified foods, such as cereals with added vitamin D. |
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| 1094. |
In water treatment plant, use of chloramines ensures |
| A. | taste and odour control |
| B. | weed control in reservoirs |
| C. | disinfection |
| D. | removal of permanent hardness |
| Answer» C. disinfection | |
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Explanation: The particular type of chloramine used in drinking water disinfection is called monochloramine. Chloramine is chiefly a secondary disinfectant that are added to water that has already been disinfected with a primary disinfectant, often chlorine |
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| 1095. |
Which blood vessels have the smallest diameter? |
| A. | Capillaries |
| B. | Arterioles |
| C. | Venules |
| D. | Lymphatic |
| Answer» A. Capillaries | |
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Explanation: Blood is carried through the body by Blood Vessels. With the help of perfusion process capillaries supplies blood to the tissues. |
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| 1096. |
Fermentation of milk to curd is due to |
| A. | Mycobacterium |
| B. | Staphylococcus |
| C. | Lactobacillus |
| D. | Yeast |
| Answer» C. Lactobacillus | |
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Explanation: When milk is heated to a temperature of 30-40°C and a small amount of old curd added to it, the Lactobacillus (bacteria) in that curd sample gets activated and multiplies |
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| 1097. |
DOTS is a treatment given to patients suffering from – |
| A. | Polio |
| B. | AIDS |
| C. | Hepatitis |
| D. | Tuberculosis |
| Answer» D. Tuberculosis | |
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Explanation: DOTS (Directly Observed Treatment, Short Course), also known as TB- DOTS, is the name given to the tuberculosis control strategy recommended by the World Health Organization. It is the best curative method for treatment of tuberculosis because of its highly efficient and cost-effective strategy. |
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| 1098. |
Magnesium is a constituent metal of – |
| A. | Chlorophyll molecule |
| B. | DNA |
| C. | Mitochondria |
| D. | Ribosomes |
| Answer» A. Chlorophyll molecule | |
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Explanation: The basic structure of chlorophyll consists of a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in hemoglobin, except that in heme the central atom is iron, whereas in chlorophyll it is magnesium. This was discovered in 1906 and was the first time that magnesium had been detected in living tissue. |
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| 1099. |
Global warming is expected to result in |
| A. | Increase in sea level |
| B. | Change in crop pattern |
| C. | Change in coastal line |
| D. | All of these |
| Answer» D. All of these | |
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Explanation: Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. It will lead to increase in sea level due to melting of polar ice, desertification leading to changes in crop patters, change in coastal line due to their submergence. |
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| 1100. |
Silk wonns feed on – |
| A. | Basil leaves |
| B. | Curry leaves |
| C. | Rose leaves |
| D. | Mulberry leaves |
| Answer» D. Mulberry leaves | |
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Explanation: Silkworms are the larva of a moth (Bombyx mori) native to Asia that spins a cocoon of fine, strong, lustrous fiber that is the source of commercial silk. silkworms feed on the leaves of the mulberries (genus Moms) and sometimes on the Osage orange (Madura pomifera). |
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