McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: General Knowledge (GK) .
| 1151. |
The only living tissue in plant xylem is |
| A. | Trachea |
| B. | Xylem fibre |
| C. | Xylem parenchyma |
| D. | Tracheid |
| Answer» C. Xylem parenchyma | |
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Explanation: Xylem parenchyma is the only living component found in xylem tissue. They are living cells associated with the xylem that are found in between the vessels arid the fibers. They act as storage house of starch and fat with assisting in conduction of water. Xylem is a complex permanent tissue specialized for the conduction of water and mineral substances in plants. |
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| 1152. |
'Insectivorous plants' trap insects for |
| A. | Nitrogen |
| B. | Fats |
| C. | Vitamins |
| D. | Carbohydrates |
| Answer» A. Nitrogen | |
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Explanation: Insectivorous plants trap insects because they grow in a soil which is deficient in nitrogen (such as acidic bogs and rock outcrops). The insects they feed on help them in fulfilling their nitrogen needs. Venus flytrap, pitcher plant, utricularia, drosera and Rafflesia are the examples of insectivorous plants. |
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| 1153. |
Arenchyma is present in – |
| A. | Banana stem |
| B. | Palm stem |
| C. | Aquatic plants |
| D. | Xerophytic plants |
| Answer» C. Aquatic plants | |
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Explanation: A xerophyte is a species of plant that has adaptations to survive in an environment with little liquid water, such as a desert or an ice or snow-covered region in the Alps or the Arctic. |
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| 1154. |
Which of the following is responsible for transport of food and other substances in plants? |
| A. | Xylem |
| B. | Phloem |
| C. | Chloroplast |
| D. | None of these |
| Answer» B. Phloem | |
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Explanation: The transport of water, nutrients and other substances from one part of a plant to another is called translocation. While, phloem transports synthesized food from the leaves to the rest of the plant body; water and minerals are transported from the roots upwards through the xylem tubes. |
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| 1155. |
One of the best solutions to get rid of non-biodeadable waste is – |
| A. | Burning |
| B. | Dumping |
| C. | Burying |
| D. | Recycling |
| Answer» D. Recycling | |
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Explanation: The best way to manage non- biodegradeble wastes such as plastics, metals and electronics is Reduce, Reuse and Recycle. The waste product can be recycled to make it usable again without posing serious challenges to the environment. Recycling is by far the most environmentally friendly option that one can choose. |
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| 1156. |
Male mosquitoes take their food from |
| A. | human blood |
| B. | standing water |
| C. | sap of plants |
| D. | dung and debris |
| Answer» C. sap of plants | |
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Explanation: Both male and female mosquitoes eat the same things—nectar, plant sap, or honeydew (a sticky substance excreted by aphid s) for energy. But only female mosquitoes imbibe a blood meal. The females need the protein in blood platelets to develop eggs. Male mosquitoes don't have specific mouthparts to pierce skin and access blood vessels. |
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| 1157. |
Smooth muscles are likely to be found in – |
| A. | muscles of legs |
| B. | muscles of arms |
| C. | stomach |
| D. | heart |
| Answer» C. stomach | |
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Explanation: The term smooth muscle refers to a muscle of the human body that is part of a involuntary muscle group. The walls of hollow organs are the primary place that smooth muscles can be found. Some of those locations include: Walls of blood vessels, walls of stomach, intestines, large (aorta) and small arteries, arterioles and veins, urinary bladder, uterus, male and female reproductive tracts, respiratory tract etc. |
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| 1158. |
The substrate of photorespiration is - |
| A. | Fructose |
| B. | Pyruvic acid |
| C. | Glycolate |
| D. | Glucose |
| Answer» C. Glycolate | |
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Explanation: Photorespiration is a special type of respiration shown by many green plants when they are exposed to light. Glycolate (glycolic acid) is the chief metabolite of photorespiration and also its substrate. Other important metabolites are the amino acids glycine and serine. |
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| 1159. |
Which one of the following types of medicines is used for treating indigestion? |
| A. | Antibiotic |
| B. | Analgesic |
| C. | Antacid |
| D. | Antiseptic |
| Answer» C. Antacid | |
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Explanation: Our digestive system needs a pH of around 1.2 to digest food properly. When the acidity gets too high, antacid tablets that contain alkaline chemicals like magnesium hydroxide are used to reduce acidity. |
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| 1160. |
Which of the following is known as animal starch? |
| A. | glycogen |
| B. | cellulose |
| C. | glucose |
| D. | chitin |
| Answer» A. glycogen | |
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Explanation: Glycogen, the principal storage form of glucose in animal cells, sometimes called "animal starch" for its resemblance with starch found in plants. It t is stored in liver and muscle cells and can be converted to glucose if needed. In the liver this conversion is regulated by the hormone glucagon. |
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| 1161. |
Maximum oxygen is available from – |
| A. | Deserts |
| B. | Green forests |
| C. | Grass lands |
| D. | Phytoplanktons |
| Answer» D. Phytoplanktons | |
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Explanation: Most of Earth's oxygen comes from tiny ocean plants - called phytoplankton - that live near the water's surface and drift with the currents. Like all plants, they photosynthesize - that is, they use sun-light and carbon dioxide to make food. Scientists believe that phytoplankton contribute between 50 to 85 percent of the oxygen in Earth's atinctspbere (National Geographic) |
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| 1162. |
Which one of the following is a vestigial organ? |
| A. | Eye-brow |
| B. | Collar-bone |
| C. | Wisdom-teeth |
| D. | Nails |
| Answer» C. Wisdom-teeth | |
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Explanation: Wisdom teeth are vestigial third molars that human ancestors used to help in grinding down plant tissue. The common postulation is that the skulls of human ancestors had larger jaws with more teeth, which were possibly used to help chew down foliage to compensate for a lack of ability to efficiently digest the cellulose that makes up a. plant cell wall. As human diets changed, smaller jaws were naturally selected, yet the third molars, or "wisdom teeth," still commonly develop in human mouths. |
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| 1163. |
Water flows off the wings of birds and insects due to the presence of - |
| A. | Waxes |
| B. | Sugars |
| C. | Proteins |
| D. | Minerals |
| Answer» A. Waxes | |
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Explanation: Insects and birds have the simplest surface waxes that serve to water proof feathers. These consist of long chain hydrocarbons. The interlocking feather barbs and a special waxy coating create a shield that water runs off of. Besides, while a few components present in surface lipids can prevent growth of pathogens, the total surface was layer certainly functions to prevent microbial entry into the organism. |
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| 1164. |
Insectivorous plants grow in soil which is deficient in – |
| A. | Nitrogen |
| B. | Sodium |
| C. | Calcium |
| D. | Magnesium |
| Answer» A. Nitrogen | |
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Explanation: Carnivorous or insectivorous plants grow in places where the soil is thin or poor in nutrients, especially nitrogen, such as acidic bogs and rock out-croppings. In this habitat, plants that have alternative strategies for |
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| 1165. |
Hind limbs thumping on ground by a rabbit is a behaviour related to – |
| A. | Courtship |
| B. | Preparation for a duet |
| C. | Warning signal to members |
| D. | Surrender of a stronger opponent |
| Answer» C. Warning signal to members | |
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Explanation: A thump of either a single hind leg or both together shows the rabbit's fear or displeasure over something. In any case, it shows the identification of some danger in the vicinity by the rabbit. The rabbit feels threatened by a danger, and warns the rest of his warren. |
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| 1166. |
When the electric impulse travels along the axon and reaches the other end called the synaptic terminal, this impulse triggers the release of – |
| A. | Vesicles |
| B. | Cleft |
| C. | Mitochondria |
| D. | All of the above |
| Answer» A. Vesicles | |
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Explanation: The electrical impulses stimulate the release of vesicles. These store various neurotransmitters that are released at the synapse. Vesicles are essential for propagating nerve impulses between neurons and are constantly recreated by the cell. |
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| 1167. |
Which is the second largest gland of Human body? |
| A. | Liver |
| B. | Large Intestine |
| C. | Thorax |
| D. | Pancreas |
| Answer» D. Pancreas | |
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Explanation: Liver is the largest gland in human body. It is also the largest (internal) organin our body and can weigh up to 1.5-1.6 kg for a human adult. The Pancreas is the second largest gland in the body and is both an endocrine and exocrine gland. |
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| 1168. |
From which part of Opium plant we get morphine? |
| A. | Leaves |
| B. | Stem |
| C. | Bark |
| D. | Fruit coat |
| Answer» D. Fruit coat | |
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Explanation: Morphine is the predominant alkaloid found in the varieties of opium poppy plant. It is obtained in form of liquid from the fruit capsule of the poppy. The latex which oozes from the incisions is collected, and dried to produce "raw opium" (about 8-14% morphine by thy weight). |
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| 1169. |
Which of the following is the primary sex organ in man? |
| A. | Prostrate |
| B. | Testis |
| C. | Vas defences |
| D. | Seminal vesicles |
| Answer» B. Testis | |
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Explanation: In the case of male reproductive system the primary sex organs are a pair of testes lying outside the abdominal cavity, enclosed in a sac called the scrotum. |
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| 1170. |
Which disease is caused by Nickel? |
| A. | Itai Itai |
| B. | Dermatitis |
| C. | Learning disability |
| D. | Asthma |
| Answer» B. Dermatitis | |
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Explanation: Nickel allergy is one of the most common causes of contact allergic dermatitis. In affected individuals, dermatitis (also called eczema) develops in places where nickel containing metal is touching the skin. |
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| 1171. |
Name the acid present in lemon. |
| A. | Phosphoric acid |
| B. | Carbonic acid |
| C. | Citric acid |
| D. | Malic acid |
| Answer» C. Citric acid | |
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Explanation: Lemons have significant concentrations of citric acid (about 47 g/l in juice). Citric acid occurs naturally in citrus fruits. |
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| 1172. |
Name the tiny pores present on the surface of leaves in plants. |
| A. | Pits |
| B. | Stomata |
| C. | Trichomes |
| D. | Hydathodes |
| Answer» B. Stomata | |
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Explanation: Stomata are pores in the surface of the leaf. The pore is surrounded by two guard cells. When these two guard cells take up water, they bend and open up the pore between them. |
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| 1173. |
Rinderpest disease of Cattle is caused by |
| A. | Insects |
| B. | Bacteria |
| C. | Virus |
| D. | Protozoa |
| Answer» C. Virus | |
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Explanation: Rinderpest is an acute, highly contagious viral disease of ruminant animals, primarily cattle, that was once common in Africa, the Indian subcontinent, and the Middle East. |
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| 1174. |
Haemoglobin in the blood is a complex protein rich in - |
| A. | Iron |
| B. | Silver |
| C. | Copper |
| D. | Gold |
| Answer» A. Iron | |
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Explanation: Hemoglobin is the iron- containing oxygen-transport metalloprotein in the red blood cells of all vertebrates. Iron is an essential part of hemoglobin. When iron stores are low, both hemoglobin and red blood cell production slows, causing anemia. |
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| 1175. |
Vitamin C is also known as - |
| A. | Amino acid |
| B. | Ascorbic acid |
| C. | Acetic acid |
| D. | Azelaic acid |
| Answer» B. Ascorbic acid | |
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Explanation: Ascorbic acid is a naturally occurring organic com-pound with antioxidant properties which is one form of Vitamin C. It dissolves well in water to give mildly acidic solutions. It is used to prevent and treat scurvy, a disease caused by a lack of vitamin C in the body |
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| 1176. |
The biological process in which both aerobes and anaerobes degrade organic matter is - |
| A. | Manuring |
| B. | Composting |
| C. | Digesting |
| D. | Nitrifying |
| Answer» B. Composting | |
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Explanation: Composting is the depomposition of plant remains and other once-living materials to make an earthy, dark, crumbly substance that is excellent for enriching soil. It is the chief way to recycle wastes. |
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| 1177. |
The cuticle is absent in - |
| A. | Leaf |
| B. | Stem |
| C. | Root |
| D. | Fruit |
| Answer» A. Leaf | |
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Explanation: The epidermis of the stem and the leaf is usually surrounded by a thin, covering called cuticle. It is formed by a waxy substance called cutin. It is meant for preventing excessive evaporation of water. Cuticle is absent in the root epidermis. |
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| 1178. |
Which of the following is not a mosquito borne disease? |
| A. | Dengue |
| B. | Malaria |
| C. | Sleeping sickness |
| D. | Filariasis |
| Answer» C. Sleeping sickness | |
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Explanation: Sleeping sickness, also called African trypanosomiasis, disease caused by infection with the flagellate protozoan Trypanosoma brucei gambiense or the closely related subspecies T. brucei rhodesiense, transmitted by the tsetse fly (genus Glossina). |
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| 1179. |
Which is not a natural fibre? |
| A. | Linen |
| B. | Silk |
| C. | Jute |
| D. | Nylon |
| Answer» D. Nylon | |
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Explanation: Jute is a long, soft, shiny vegetable fiber that can be spun into coarse,strong threads. "Nylon" is not a natural fibre. It is a synthetic fibre. |
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| 1180. |
Glucose is a type of - |
| A. | Pentose sugar |
| B. | exose sugar |
| C. | Tetrose sugar |
| D. | Diose sugar |
| Answer» B. exose sugar | |
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Explanation: Three common sugars (glucose, galactose and fructose) share the same molecular formula: C6H12O6. Because of their six carbon atoms, each is a hexose. They are "single" sugars or monosaccharides. |
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| 1181. |
Number of mitochondria in bacterial cell is - |
| A. | one |
| B. | two |
| C. | many |
| D. | zero |
| Answer» D. zero | |
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Explanation: Bacteria are prokaryotes, which, by definition, are cells that don't possess membrane-bound organelles. Mitochondria are membrane-bound organelles. Cellular respiration, in prokaryotes, occurs within the cytoplasm or inner surfaces of the cell. |
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| 1182. |
The maximum fixation of solar energy is done by - |
| A. | Protozoa |
| B. | Bacteria |
| C. | Fungi |
| D. | Green plants |
| Answer» D. Green plants | |
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Explanation: The maximum 20% of the input of solar energy falling on leaves is converted into chemical energy by green plants. Green plants utilize solar energy and synthesize sugar from CO2 and water through the process of photosynthesis. However, they are able to utilize only 3% of the light energy that strikes on their green parts; the rest is dissipated as heat. |
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| 1183. |
Which one of the following chemicals is associated with muscle fatigue? |
| A. | Uric acid |
| B. | Acetic acid |
| C. | Pyruvic acid |
| D. | Lactic acid |
| Answer» D. Lactic acid | |
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Explanation: Muscle fatigue refers to the decline in muscle force generated over sustained periods of activity. Intracellular acidosis due mainly to lactic acid accumulation has been regarded as the most important cause of skeletal muscle fatigue. Lactic acid accumulation leads to increased intracellular hydrogen ion (H+) concentration that leads to a weaker con- traction. |
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| 1184. |
Which of the following is a form of sexual reproduction: |
| A. | Fragmentation |
| B. | Haemapheoditism |
| C. | Budding |
| D. | Fission |
| Answer» B. Haemapheoditism | |
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Explanation: Hermaphroditism is a form of sexual reproduction. Hermaphrodite is an organism that has reproductive organs normally associated with both male and female sexes. Hermaphroditic plants—most flowerhig plants, or angiosperms—are bisexual. Hermaph-roditic animals—mostly invertebrates such as worms, moss animals, trematodes, snails, slugs, etc—are usually parasitic, permanently attached to another animal or plant. |
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| 1185. |
The 'Red Data Book' is the documentation of endangered rare species of: |
| A. | Flora |
| B. | Fauna |
| C. | Other living organisms |
| D. | All of these are correct |
| Answer» D. All of these are correct | |
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Explanation: A Red Data Book contains lists of species whose continued existence is threatened. Species are classified into different categories of perceived risk. It documents rare and endangered species of animals, plants and fungi, as well as other living organisms in an area, region or country. |
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| 1186. |
The parts of human body affected by Pyria are: |
| A. | eyes |
| B. | small intestine |
| C. | teeth and gums |
| D. | large intestine |
| Answer» C. teeth and gums | |
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Explanation: Pyria, or periodontal disease, is a progressive gum disease characterized by inflammation resulting from the toxins found in plaque. It leads to bleeding of the gums. If allowed to progress, Pyria begins to destroy underlying tissue, which may eventually lead to tooth loss or infection in other areas of the body as the bacteria travels by bloodstream. |
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| 1187. |
What is the most basic criteria used to decide whether something is alive? |
| A. | Walking |
| B. | Breathing |
| C. | Molecular movements |
| D. | Life processes |
| Answer» D. Life processes | |
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Explanation: Mostly, any kind of visible movement such as breathing, walking or growing is referred to decide if something is alive or not. But, a living organism may have movements not visible to the naked eye. |
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| 1188. |
Which of the following is known as ‘suicide bags of the cell’? |
| A. | Mitochondria |
| B. | Golgi Bodies |
| C. | Lysosomes |
| D. | Ribosomes |
| Answer» C. Lysosomes | |
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Explanation: Lysosomes are a kind of waste disposal system of the cell. It contains digestive enzymes for almost all types of organic materials. |
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| 1189. |
The waste management technique that involves the use of microorganisms to remove or neutralize pollutants from contaminated site is called |
| A. | Bio sensor |
| B. | Bio magnification |
| C. | Bio remecliation |
| D. | Bio concentration |
| Answer» C. Bio remecliation | |
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Explanation: Bioremediation is a waste management technique that involves the use of organisms to remove or neutralize pollutants from a contaminated site. It uses naturally occurring organisms to break down hazardous substances into less toxic or non-toxic substances. There are two classes of bioremediation used In situ and Ex situ. |
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| 1190. |
Who is known as the 'Father of Green Revolution' in India? |
| A. | G. Paul |
| B. | Norman Borlaug |
| C. | Van Neil |
| D. | Dr. Mithchell |
| Answer» B. Norman Borlaug | |
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Explanation: Norman Borlaug, an American biologist and humanitarian, is globally known as the Father of Green Revolution for introducing techniques that contributed to the extensive increases in agricultural production. He is credited with saving over a billion people worldwide from starvation. M. S. Swaminathan is known as "Indian Father of Green Revolution" for his leadership in introducing and further developing high-yielding varieties of wheat in India. |
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| 1191. |
The specific role of Vitamin K is in the synthesis of - |
| A. | Albumin. |
| B. | Antibodies |
| C. | Globulin |
| D. | Prothrombin |
| Answer» D. Prothrombin | |
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Explanation: Vitamin K is a necessary participant in synthesis of several proteins that mediate both coagulation and anticoagulation. It is noteworthy for the synthesis of Prothrombin (coagulation factor II) that forms thrombin in the clotting process. Vitamin K is integrally involved in the clotting mechanism of blood. |
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| 1192. |
Increased RBC's in the blood leads to a condition called - |
| A. | Anemia |
| B. | Haemophilia |
| C. | Polycythemia |
| D. | Leukaemia |
| Answer» C. Polycythemia | |
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Explanation: Polycythemia is an abnormally high concentration of hemoglobin in the blood through an increase in red cell numbers. People with this condition have thicker blood, which makes it harder for blood to circulate around the body. A relatively stable number of RBCs is maintained in the circulation by increasing or decreasing the rate of production by the bone marrow. |
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| 1193. |
'Mendal' is known as – |
| A. | Father of Physiology |
| B. | Father of Geology |
| C. | Father of Genetics |
| D. | Father of Biology |
| Answer» D. Father of Biology | |
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Explanation: Gregor Mendal is known as the 'Father of modern genetics.' Through his pea plant experiments conducted between 1856 and 1863, he discovered the fundamental laws of inheritance. |
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| 1194. |
What makes a reptile a reptile? |
| A. | Cold blooded |
| B. | Warm Blooded |
| C. | Non-Hearing |
| D. | Egg-laying |
| Answer» D. Egg-laying | |
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Explanation: Reptile’s skin is covered with hard, dry scales and most repltiles lay eggs. Those animals which are coldblooded don't automatically maintain a constant body temperature. |
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| 1195. |
Growing agricultural crops between rows of planted trees is known as - |
| A. | Social forestry |
| B. | Jhum |
| C. | Taunia system |
| D. | Agro forestry |
| Answer» C. Taunia system | |
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Explanation: The Taungya system involves growing agricultural crops between rows of planted trees (sal, teak, etc). Along with jhum cultivation, it is one of the well-known systems of agro forestry programmes in practice in our country. |
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| 1196. |
Which of the following increases the rate of heart beat? |
| A. | Peripheral nerves |
| B. | Sympathetic nerves |
| C. | Parasympathetic nerves |
| D. | Cranial nerves |
| Answer» B. Sympathetic nerves | |
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Explanation: Heart rate is controlled by the two branches of the autonomic (involuntary) nervous system. The sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS). The sympathetic nervous system (SNS) releases the hormones (catecholamines - epinephrine and norepinephrine) to accelerate the heart rate. The parasympathetic nervous sys-tem (PNS) releases the hormone acetylcholine to slow the heart rate. |
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| 1197. |
Riboflavin is a/an - |
| A. | Vitamin |
| B. | Hormone |
| C. | Fatty acid |
| D. | Enzyme |
| Answer» A. Vitamin | |
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Explanation: Riboflavin, also known as vitamin B2, is one of the eight B-complex vitamins. It is a water-soluble vitamin that functions as a coenzyme, meaning that it is required for enzymes (proteins) to perform normal physiological actions. Riboflavin is found in milk, cheese, eggs, leaf vegetables, liver, kidneys, legumes, mushrooms, and almonds. |
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| 1198. |
Locomotory organ of a starfish is - |
| A. | Tube feet |
| B. | Paddle |
| C. | Muscular foot |
| D. | Flipper |
| Answer» A. Tube feet | |
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Explanation: Starfish carry out movements with the help of tube feet that are part of the water vascular system. Apart from their function in locomotion, the tube feet act as accessory gills. The water vascular system serves to transport oxygen from, and carbon dioxide to, the tube feet and also nutrients from the gut to the muscles involved in locomotion. |
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| 1199. |
Pencillin is extracted from – |
| A. | yeast |
| B. | algae |
| C. | fungus |
| D. | lichen |
| Answer» C. fungus | |
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Explanation: Penicillin is a secondary metabolite of certain species of Penicillium and is produced when growth of the fungus is inhibited by stress. |
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| 1200. |
HIV is a - |
| A. | Combination of disease symptoms - |
| B. | developmental index |
| C. | viral disease |
| D. | retrovirus |
| Answer» D. retrovirus | |
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Explanation: The retrovirus then integrates its viral DNA into the DNA of the host cell, which allows the retrovirus to replicate. HIV, the virus that causes AIDS, is a retrovirus. |
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