McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: General Knowledge (GK) .
| 1251. |
Blood group was discovered by – |
| A. | Alexander Fleming |
| B. | William Harvey |
| C. | Landsteiner |
| D. | Paulov |
| Answer» C. Landsteiner | |
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Explanation: Karl Landsteiner, an Austrian biologist and physician, is noted for having distinguished the main blood groups in 1900. He developed the modern system of classification of blood groups from his identification of the presence of agglutinins in the blood. In 1930, he received the Nobel Prize in Physiology or Medicine. |
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| 1252. |
In a rainforest, the vegetation that grows under the shade of a canopy is known as - |
| A. | Crown |
| B. | Canopy |
| C. | Understorey |
| D. | Forest floor |
| Answer» C. Understorey | |
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Explanation: In ecology, understorey refers to a layer of vegetation beneath the main canopy of a forest. It comprises plant life growing beneath the forest canopy without penetrating it to any great extent, but above the forest floor. Only a small percentage of light penetrates the canopy so understory vegetation is generally shade tolerant. |
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| 1253. |
Clove is obtained from – |
| A. | Root |
| B. | Stem |
| C. | Leaves |
| D. | Flower buds |
| Answer» D. Flower buds | |
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Explanation: Cloves are obtained from the aromatic flower buds of a tree in the family Myrtaceae, Syzygium aromaticum. Cloves ate the dried unopened flower buds and calyx tubes, harvested before the flowers have opened, of theclove tree. Cloves are collected when the flower bud is not yet open. |
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| 1254. |
Which of the following is the treatment of water pollution? |
| A. | Bag house filter |
| B. | Windrow composting |
| C. | Venturi scrubber |
| D. | Reverse Osmosis |
| Answer» D. Reverse Osmosis | |
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Explanation: Reverse osmosis (RO) is a water purification technology that uses a semipermeable membrane to remove ions, molecules, and larger particles from drinking water. It can remove many types of dissolved and suspended species from water, including bacteria, and is used in both industrial processes and the production of potable water. It is most commonly known for its use in drinking water purification form. |
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| 1255. |
Which part of human body is affected by the ALZHEIMER'S disease? |
| A. | Heart |
| B. | Kidney |
| C. | Immune System |
| D. | Brain |
| Answer» D. Brain | |
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Explanation: Alzheimer disease is an irreversible, progressive disorder in which brain cells (neurons) deteriorate, resulting in the loss of cognitive functions, primarily memory, judgment and reasoning, movement coordination and pattern recognition. It leads to nerve cell death and tissue loss throughout the brain. |
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| 1256. |
What do you call the study of fungi? |
| A. | Mycology |
| B. | Parasitology |
| C. | Bacteriology |
| D. | Ecology |
| Answer» A. Mycology | |
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Explanation: Mycology is the branch of biology concerned with the study of fungi. It includes the study of fungi's genetic and biochemical properties, their taxonomy and their use to humans as a source for tinder, medicine, food, and entheogens, as well as their dangers, such as poisoning or infection |
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| 1257. |
Which of the following is the longest vein in the human body? |
| A. | Trochlear |
| B. | Inferior vena cava |
| C. | Saphenous vein |
| D. | Trigeminal |
| Answer» C. Saphenous vein | |
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Explanation: The great saphenous vein, the major superficial vein of the medial leg and thigh, is the longest vein in the human body. It extends from the top of the foot to the upper thigh and groin, running along the length of the lower limb. It plays an important role in re- turning blood from the superficial tissues of the leg to the heart. |
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| 1258. |
Which word is common in the botanical names of trees like Ashoka, Tamarind or Coral? |
| A. | Terminalia |
| B. | Salmi |
| C. | Indica |
| D. | Acacia |
| Answer» C. Indica | |
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Explanation: Tamarind tree (Tamarindus indica), Ashoka tree (Saraca Indica), Indian Coral tree (Erythrina Indica) have 'Indica' common in their botanical names. In biology/taxonomy, if a species originates in India, its scientific name sometimes includes "Indica". |
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| 1259. |
The part of brain which controls emotional reactions in our body is – |
| A. | Hypothalamus |
| B. | Cerebrum |
| C. | Meninges |
| D. | Thalamus |
| Answer» A. Hypothalamus | |
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Explanation: The brain's limbic system controls emotional expression through the hypothalamus, which has control over the body's emotional responses systems. The hypothalamus is responsible for regulating hunger, thirst, response to pain, levels of pleasure, sexual satisfaction, anger and aggressive behavior, etc. It also regulates pulse, blood pressure, breathing, and arousal in response to emotional circumstances. |
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| 1260. |
To reduce tooth decay most toothpastes contain a – |
| A. | Bromide |
| B. | Fluoride |
| C. | Iodide |
| D. | Chloride |
| Answer» B. Fluoride | |
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Explanation: Fluoride in toothpastes prevent tooth, decay from progressing and can even reverse, or stop, early tooth decay. It works by promoting a chemical reaction in tooth enamel that draws in replacement minerals including calcium. Fluoride incorporates itself into enamel weakened by acid attack, making the tooth more resistant to future acid attacks. |
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| 1261. |
'Red Data Book' provides an account of – |
| A. | Endangered plants only |
| B. | Fossil plants |
| C. | Endangered plants and animals |
| D. | Extinct animals only |
| Answer» C. Endangered plants and animals | |
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Explanation: The Red Data Book is the state document established for documenting rare and endangered species of animals, plants and fungi as well as some local sub-species that exist within the territory of the state or country. This book provides central information for studies and monitoring programmes on rare and endangered species and their habits. |
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| 1262. |
First human heart transplant was performed in – |
| A. | 1972 |
| B. | 1955 |
| C. | 1967 |
| D. | 1959 |
| Answer» C. 1967 | |
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Explanation: Christiaan Barnard, a South African cardiac surgeon, performed the world's first successful human-tohuman heart transplant at Groote Schuur Hospital, Cape Town on 3 December 1967. The recipient o heart transplant was Louis Washkansky, a fifty three year old grocer with a debilitating heart condition. |
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| 1263. |
Photoperiodism affects – |
| A. | All of these |
| B. | Flowering |
| C. | Vegetative growth |
| D. | Fruiting |
| Answer» A. All of these | |
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Explanation: Photoperiodism is the developmental responses of plants to the relative lengths of light and dark periods. It affects the vegetative growth as well as the time of flowering and fmiting in plants. For example, some annual plants may be made to complete their life cycle twice in a year, while others can be made to take on characteristics of everlasting flowering species and continue to produce flowers and fruits on an indefinite period, while in yet other species the plant may continue vegetative development indefinitely without flowering. |
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| 1264. |
The least penetrating power ray is – |
| A. | X-Ray |
| B. | a-Ray |
| C. | B-Ray |
| D. | y-Ray |
| Answer» B. a-Ray | |
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Explanation: Since alpha particles are high in ionizing power, it is difficult for them to penetrate matter thoroughly. This is because alpha particles are likely to ionize the first thing they come into contact with; thus, they hold a small range of penetrating power. Beta rays have intermediate; while, Gamma Rays and X Rays have maximum penetrating power. |
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| 1265. |
Which one of the following types of malaria is pernicious malaria? |
| A. | Vivax |
| B. | Ralapse |
| C. | Tertian |
| D. | Malignant |
| Answer» D. Malignant | |
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Explanation: Pernicious malaria is always caused by Plasmodium falciparum and characterized by severe malarial paroxysms that recur about every 48 hours and of-ten by acute cerebral, renal, or gastrointestinal manifestations. It is also called malignant tertian malaria. |
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| 1266. |
Lungs of a plant are – |
| A. | Leaves |
| B. | Stems |
| C. | Flowers |
| D. | Roots |
| Answer» A. Leaves | |
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Explanation: Leaves are the lungs of plants. Much like the lungs of animals, leaves are the place of a plant's respiration. It is from leaves that oxygen is emitted during the light hours of the day and carbonic acid gas at night. |
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| 1267. |
Enzymes are – |
| A. | Proteins |
| B. | Minerals |
| C. | Oils |
| D. | Fatty acids |
| Answer» A. Proteins | |
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Explanation: Enzymes are biological molecules (proteins) that act as catalysts and help complexreactions occur everywhere in life. They are in general globular proteins. They speed up reactions by providing an alternative reaction pathway of lower activation energy. |
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| 1268. |
The largest cells in mammalian blood are – |
| A. | Erythrocytes |
| B. | Monocytes |
| C. | Basophils |
| D. | Lymphocytes |
| Answer» B. Monocytes | |
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Explanation: Various components of blood are: Plasma, Erythrocytes (Red Blood Cells), Leueocytes (White Blood Cells) and Thrombocyles/Platelets. Monocytes, also known as macrophages, are the largest blood cells in most mammals, measuring 10-15 m in diameter. They are leucocytes. Their nuclei are kidney-shaped and cytoplasm is abundant. |
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| 1269. |
Which acid is present in lemon? |
| A. | marlic acid |
| B. | citric acid |
| C. | lactic acid |
| D. | tartaric acid |
| Answer» B. citric acid | |
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Explanation: Citric acid is a weak organic acid with the formula C6H8O7.The juice of the lemon is about 5% to 6% citric acid, which gives a sour taste. |
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| 1270. |
Which instrument is used for measuring humidity of atmosphere? |
| A. | Barometer |
| B. | Anemometer |
| C. | Thermometer |
| D. | Hygrometer |
| Answer» D. Hygrometer | |
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Explanation: A hygrometer, also known as a psychrometer, is used to measure the humidity in the air. |
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| 1271. |
Just born baby has the respiratory rate as – |
| A. | 32 times/minute |
| B. | 26 times/minute |
| C. | 18 times/minute |
| D. | 15 times/minute |
| Answer» A. 32 times/minute | |
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Explanation: New born babies and children normally breathe faster than older children and adults. Their respiratory rate is about 30-60 breaths per minute. The respiratory rate for the different age-categories of children is:-6-1.2 months: 24-30; 1-5 years: 20-30: 6-12 years: 12-20. |
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| 1272. |
Uric acid is the chief nitrogenous wastes in – |
| A. | Frogs |
| B. | Birds |
| C. | Fishes |
| D. | Mankind |
| Answer» B. Birds | |
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Explanation: Land snails, insects, birds, and some reptiles excrete uric acid as the major nitrogenous waste. The white, crystalline substance seen in a typical bird or lizard "poop" is actually urine: a little pool of uric acid crystals in a very small amount of water. |
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| 1273. |
Who proposed Binomial Nomenclature? |
| A. | Linnaeus |
| B. | John Ray |
| C. | Huxley |
| D. | Aristotle |
| Answer» A. Linnaeus | |
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Explanation: Binomial nomenclature is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin gram-matical forms. The formal introduction of this system of narning species is credited to Swedish natural scientist Carl Linnaeus, effectively beginning with his work 'Species Plantarum' in 1753. |
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| 1274. |
Who proposed Five Kingdom Classification? |
| A. | R.H. Whittaker |
| B. | John Ray |
| C. | Carolus Linnaeus |
| D. | H.F. Copeland |
| Answer» A. R.H. Whittaker | |
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Explanation: R.H Whittaker proposed the five kingdom classification in 1969. Those five kingdoms are: Monera, Protista, Mycota (Fungi), Metaphyta (Plantae) and Metazoa (Animalia). It is the most accepted system of modern classification as the different groups of animals are placed phylogenetically. |
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| 1275. |
Sporangia bearing leaf of a fern is called |
| A. | Rarnentum |
| B. | Indusium |
| C. | Sorus |
| D. | Sporophy |
| Answer» C. Sorus | |
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Explanation: The Sporangia are the reproductive structures of the ferns and fern allies. They are miniature sacks or capsules that produce the dust-like spores that are the "seeds" by which ferns are propagated. Several sporangia grouped together are called a Sort's. |
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| 1276. |
Hydrogen peroxide is an effective sterilizing agent. Which one of the following product results when it readily loses active oxygen? |
| A. | Nascent Hydrogen |
| B. | Water |
| C. | Hydrogen |
| D. | Ozone |
| Answer» B. Water | |
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Explanation: Hydrogen peroxide (H2O2) is a water molecule with an extra oxygen atom. It is very unstable and breaks down readily into water and a single oxygen molecule. So in nutshell, when Hydrogen peroxide readily loses active oxygen, Water is formed. |
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| 1277. |
In India Dugong (sea cow) is found in the bioreserve site of: |
| A. | Gulf of Mannar |
| B. | Nokrek |
| C. | Manas |
| D. | Sundarban |
| Answer» A. Gulf of Mannar | |
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Explanation: The sea mammal Dugong is found in the Gulf of Mannar biosphere reserve. It feeds on sea grasses like Halodule uninervis which occur in abundance in the waters around the Krusadai and Shingle islands and off the coast of Mandapam. Gulf of Mannar is the firstMarine Biosphere Reserve not only in India, but also in south and Southeast Asia. |
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| 1278. |
Life originated by chemosynthesis was proved in the laboratory by – |
| A. | Sanger |
| B. | Pasteur |
| C. | Miller |
| D. | Aristotle |
| Answer» C. Miller | |
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Explanation: The Miller-Urey experiment of 1952 simulated the conditions thought at the time to be present on the early Earth, and tested the chemical origin of life under those conditions in a laboratory. The experiment demonstrated how amino acids could be generated in a lab environment from simple compounds subjected to electrical discharges in the early Earth's atmosphere. The spontaneous creation of amino ac-ids was used in this experiment to explain life's origins by chemosynthesis. |
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| 1279. |
An example of hormone is – |
| A. | Cytosine |
| B. | Renin |
| C. | Oxytocin |
| D. | Peprin |
| Answer» C. Oxytocin | |
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Explanation: Oxytocin is an hormone that is normally produced in the hypothalamus and stored in the posterior pituitary gland. It plays a role in social bonding, sexual reproduction in both sexes, and during and after childbirth. It is released due to stretching of the cervix and uterus during labor and with stimulation of the nipples from breastfeeding. |
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| 1280. |
What is the famous 'Chipko' movement associated with? |
| A. | Saving the tigers |
| B. | Saving the wetland |
| C. | None of these |
| D. | Trees |
| Answer» D. Trees | |
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Explanation: The Chipko movement refers to an organized resistance to the destruction of forests that arose in India during the 1970s: The name of the movement comes from the word ‘embrace', as the villagers hugged the trees, and prevented the contractors' from felling them. In 1987, the Chipko Movement was awarded the Right Livelihood Award. |
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| 1281. |
Which of the following insect has its scientific name as Blattaria? |
| A. | Hectic |
| B. | Cockroach |
| C. | Mosquito |
| D. | Butterfly |
| Answer» B. Cockroach | |
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Explanation: The term Blattaria comes from the Latin blatta, which simply means cockroach. It is the scientific name of cockroaches and refer to an order of medium to large sized broadly oval flattened cursorial cockroaches. In some classifications, cockroaches are treated as belonging to the Blattodea sub-order of Blattaria order. |
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| 1282. |
Which one of the following is also called as milk sugar? |
| A. | Glucose |
| B. | Fructose |
| C. | Maltose |
| D. | Lactose |
| Answer» D. Lactose | |
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Explanation: The main sugar found in milk is known as lactose, which is a natural sugar that is made up of glucose and galactose. It provides a mildly sweet taste to milk. It makes up around 2- 8% of the solids in milk. Lactase, found in the small intestine, breaks down lactose into two simpler forms of sugar: glucose and galactose, which is then absorbed by the body. |
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| 1283. |
Which of the following mammals lay eggs? |
| A. | Bat |
| B. | Whale |
| C. | Weasel |
| D. | Platypus |
| Answer» D. Platypus | |
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Explanation: The platypus, also known as the duck-billed platypus, is a semiaquatic egg- laying mammal endemic to eastern Australia, including Tasmania. Together with the four species of echidna, it is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth. |
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| 1284. |
Chlorophyll containing autotrophic thallophytes is called as – |
| A. | Algae |
| B. | Lichens |
| C. | Fung |
| D. | Bryophytes |
| Answer» A. Algae | |
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Explanation: Algae are chlorophyll (green pigment) containing thallophytes. They prepare their own food and are thus autotrophic in their mode of nutrition. |
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| 1285. |
'Table sugar' is which type of sugar? |
| A. | Fructose |
| B. | Galactose |
| C. | Glucose |
| D. | Sucrose |
| Answer» D. Sucrose | |
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Explanation: Anopheles (female): Malaria; Culex: Filariasis; Sand Fly: Kala-azar; Tse-tse fly: Sleeping Sickness. |
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| 1286. |
Where does the cabbage store food? |
| A. | Leaves |
| B. | Stem |
| C. | Fruit |
| D. | Root |
| Answer» A. Leaves | |
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Explanation: Cabbages have no need to store food as they are seasonal plants and die after about 4 to 6 months. They do however produce food in the leaves of the plants and would utilize short-term storage (in the leaves) for simple metabolic processes. |
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| 1287. |
Anemia is related to . |
| A. | iodine deficiency |
| B. | calcium deficiency |
| C. | iron deficiency |
| D. | food poisoning |
| Answer» C. iron deficiency | |
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Explanation: The major causes of this type are iron deficiency (low level iron) anemia and thalassemia (inherited disorders of hemoglobin). |
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| 1288. |
'Breakbone fever' most commonly known as? |
| A. | Typhoid |
| B. | Rhinitis |
| C. | Yellow fever |
| D. | Dengue |
| Answer» D. Dengue | |
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Explanation: Breakbone fever: Also known as dengue fever, an acute mosquito-borne viral illness of sudden onset. |
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| 1289. |
Decoding and interpretation of visual information in brain is associated with - |
| A. | Frontal lobe |
| B. | Occipital lobe |
| C. | Temporal lobe |
| D. | Parietal lobe |
| Answer» C. Temporal lobe | |
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Explanation: Temporal lobe is associated with decoding non-verbal patterns, visual decoding, interpreting and remembering visual information. The temporal lobe is involved in processing sensory input into derived meanings for the appropriate retention of visual memory, language comprehension, and emotion association. |
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| 1290. |
The food in Onion is stored in the form of - |
| A. | Cellulose |
| B. | Protein |
| C. | Starch |
| D. | Sugar |
| Answer» D. Sugar | |
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Explanation: Bulbs like garlic and onion store food in the form of sugar (sucrose) rather than starch. . This is also true of sugar beet, sugarcane, etc. In onions, the food is stored in leaves. However, in most plants, starch is stored as food. Cellulose is not a food for plants but a building material. |
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| 1291. |
Lichen is an association between which of the two? |
| A. | Algae and fungus |
| B. | Algae and tree |
| C. | Fungus and tree |
| D. | Bacteria and legume plant |
| Answer» A. Algae and fungus | |
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Explanation: A lichen is an organism that is formed by the symbiotic association of a fungus and an algae or cyanobacterium. It occurs as crusty patches or bushy growths on tree trunks, bare ground, etc. The properties are sometimes plant-like, but lichens are not plants. |
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| 1292. |
Among the given nutrients, milk is a poor source of which of the following? |
| A. | Vitamin 'C' |
| B. | Calcium |
| C. | Protein |
| D. | Carbohydrate |
| Answer» A. Vitamin 'C' | |
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Explanation: Milk is a poor source of ascorbic acid (Vitamin C). It contains about 1 mg ascorbate per 100 g. Even the little Vitamin C is usually destroyed when the milk is heat treated. The richest sources of ascorbic acid are fruits and vegetables. Milk is a good source of retinol and thiamin. |
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| 1293. |
Which among the following has the maximum life span - |
| A. | Eagle |
| B. | Tortoise |
| C. | Tiger |
| D. | Elephant |
| Answer» B. Tortoise | |
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Explanation: Tortoises generally have one of the longest lifespan of any animal. Some individuals are known to have lived longer than 150 years. Galapagos giant tortoise has life spanof 190 years. Because of this, they symbolize longevity in some cultures, such as China. |
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| 1294. |
Which one of the following is a water soluble vitamin? |
| A. | A |
| B. | C |
| C. | K |
| D. | D |
| Answer» B. C | |
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Explanation: Vitamins are classified as either fat soluble (vitamins A, D, E and K) or water soluble (vitamins B and C).B-complex vitamins and vitamin C are water-soluble vitamins that are not stored in the body and must be replaced each day. These vitamins are easily destroyed or washed out during food storage and preparation. |
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| 1295. |
Which one can imitate human speech? |
| A. | whale |
| B. | dolphin |
| C. | ape |
| D. | bear |
| Answer» B. dolphin | |
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Explanation: Animals that are able to talk like humans are all “vocal learners,” BBC explains. They hear sounds and learn how to imitate them. Besides humans, some of the most skilled vocal learners include parrots, songbirds, dolphins, and beluga whales. |
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| 1296. |
What is called sunshine vitamin? |
| A. | Vitamin A |
| B. | Vitamin B |
| C. | Vitamin C |
| D. | Vitamin D |
| Answer» D. Vitamin D | |
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Explanation: Vitamin D is called "the sunshine vitamin" because our skin makes it when it is exposed to UVB radiation from sunlight. |
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| 1297. |
The virus of AIDS affects the growth of |
| A. | Haemoglobin |
| B. | RBCs in blood |
| C. | T cells in blood |
| D. | Grey cells in brain |
| Answer» C. T cells in blood | |
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Explanation: Human immunodeficiency virus (HIV) attacks and kills crucial immune system cells, known as T-helper cells. A T cell, or T lymphocyte, is a type of lymphocyte (a subtype of white blood cell) that plays a central role in cell-mediated immunity. They are called T cells because they mature in the thymus from thymocytes. |
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| 1298. |
Gustation refers to the sense of which of the following? |
| A. | Smell |
| B. | Hearing |
| C. | Tactile |
| D. | Taste |
| Answer» D. Taste | |
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Explanation: Gustation is usually called the sense of taste. Taste is the sensation produced when a substance in the mouth reacts chemically with taste receptor cells located on taste buds in the oral cavity, mostly on the tongue. Taste cells are gathered together in taste buds on the tongue, and taste buds are hidden in bumps on the tongue called papillae. |
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| 1299. |
Which enzyme is present in all members of the animal kingdom except Protozoa? |
| A. | Insulin |
| B. | Pepsin |
| C. | Renin |
| D. | Amylase |
| Answer» D. Amylase | |
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Explanation: Digestion in Protozoa is carried on by several enzymes such as peptidase, proteinase, lipase, etc. For example, Insulin has important role in the glucose uptake of protozoa.However, protozoa lack amylase which is required for the digestion of fats and starch. It is due to the absence of amylase that protozoa such as amoeba cannot digest fats and starch. |
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| 1300. |
The most serious air pollutant causing health hazard is – |
| A. | Sulphur dioxide |
| B. | Carbon monoxide |
| C. | Ozone |
| D. | Nitrogen oxide |
| Answer» A. Sulphur dioxide | |
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Explanation: Sulphur dioxide (SO2) is considered as the most serious single air pollutant causing health hazard, obstructing breathing. It always leads to airways inflammation, eye irritation, psychic alterations, pulmonary oedema, heart failure and circulatory collapse. It is also responsible for acid rain. |
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