McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: General Knowledge (GK) .
| 1351. |
Why is Carbon Monoxide a pollutant? |
| A. | Reacts with haemoglobin |
| B. | Makes nervous system inactive |
| C. | It reacts with Oxygen |
| D. | It inhibits glycolysis |
| Answer» A. Reacts with haemoglobin | |
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Explanation: Carbon monoxide (CO) is considered a pollutant since it is toxic to hemoglobic animals (including humans) when encountered in concentrations above about 35 ppm. It combines with hemoglobin to produce carboxyhemoglobin, which usurps the space in hemoglobin that normally canies oxygen, but is ineffective for delivering oxygen to bodily tissues. A level of 50% carboxyhemoglobin may result in seizure, coma, and fatality. |
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| 1352. |
Which of the following is an emergency hormone in humans? |
| A. | Thyroxine |
| B. | Insulin |
| C. | Adrenalin |
| D. | Progestrone |
| Answer» C. Adrenalin | |
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Explanation: 0 |
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| 1353. |
Webbed neck is a characteristic of – |
| A. | Down's syndrome |
| B. | Turner's syndrome |
| C. | Klinefelter's syndrome |
| D. | Cri-du-chat syndrome |
| Answer» B. Turner's syndrome | |
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Explanation: A webbed neck, or pterygium colli deformity, is a congenital skin fold that runsalong the sides of the neck down to the shouldersit is a feature of Turner syndrome and Noonan syndrome, as well as the rarer Klippel- Feil syndrome. Turner Syndrome (TS) is a condition in which a female is partly or completely missing an X chromosome. |
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| 1354. |
Compounds that are needed for enzymes to function properly are – |
| A. | Steroids |
| B. | Vitamins |
| C. | Heavy metals |
| D. | Buffers |
| Answer» B. Vitamins | |
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Explanation: Vitamins are organic molecules that function in a wide variety of capacities within the body. The most prominent function of the vitamins is to serve as cofactors (co- enzymes) for enzymatic reactions. If an enzyme lacks the essential vitamin, it cannot perform its catalyst function properly. |
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| 1355. |
The tree popularly known as 'Green Gold', but which is an ecological disaster, is - |
| A. | Banyan |
| B. | Peepal |
| C. | Eucalyptus |
| D. | None of these |
| Answer» C. Eucalyptus | |
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Explanation: Several trees such as Neem, bamboo, eucalyptus, etc., are known as 'green gold.' Eucalyptus is called green gold because of its widespread use in the international wood products and pulp industry. However, the eucalyptus tree has been accused of being an environmental disaster with its thirst for water and propensity towards soil depletion. Be-sides, it is host to Cryptococcus's, a fungus that attacks the human nervous system. |
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| 1356. |
People with Down's syndrome invariably affected by: |
| A. | Huntington's disease |
| B. | Alzheimer's disease |
| C. | Meningitis |
| D. | Brain haemorrhage |
| Answer» B. Alzheimer's disease | |
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Explanation: The best-known and most common chromosome abnormality in humans is Down's syndrome, a condition associated with an extra chromosome 21. Down's syndrome individuals also almost invariably develop Alzheimer's disease, a form of dementia that is fairly common among the elderly. People with Down's syndrome develop this disease in their fourth or fifth decade of life, much sooner than other people |
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| 1357. |
Damping off of seedlings is caused by |
| A. | Peronospola parasitica |
| B. | Albugo Candida |
| C. | Phytophthora infestans |
| D. | Pythium debaryanum |
| Answer» D. Pythium debaryanum | |
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Explanation: Damping off is a horticultural disease or condition, caused by a number of different pathogens that kill or weaken seeds or seedlings before or after they germinate. Pythium, a genus of parasitic oomycete, are most often responsible for damping-off. Along with Rhizoctonia solani, attacks by Pythium are most associated with producing roughly circular patcties of dead seedlings. |
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| 1358. |
Which among the following is the sweetest sugar? |
| A. | lacrose |
| B. | fructose |
| C. | maltos |
| D. | glucose |
| Answer» B. fructose | |
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Explanation: There are primarily three types of sugar: glucose, fructose and sucrose. Of the three sugars, fructose is the sweetest and glucose the least sweet, so typically less fructose can be used than table sugar (sucrose) - if sucrose has a sweetness of one, fructose is 1.7 and glucose 0.74. Fructose is known as the fruit sugar as its make source in the diet is fruits and vegetables. |
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| 1359. |
An eazyme produced by HIV that allows the integration of HIV DNA into the host cell's DNA is |
| A. | Ligase |
| B. | Integrase |
| C. | Helicase |
| D. | DNA gyrase |
| Answer» B. Integrase | |
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Explanation: HIV's enzyme for inserting the DNA version of its genome into the host cell DNA is called its "integrase". HIV-1 integrase catalyzes the "cut-and-paste" action of clipping the host DNA and joining the proyiral genome to the clipped ends. It is also produced by viruses containing double-stranded DNAs for the same purpose. |
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| 1360. |
Interferons are synthesized in response to – |
| A. | Bacteria |
| B. | Fungi |
| C. | Mycoplasma |
| D. | Virus |
| Answer» D. Virus | |
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Explanation: Interferons (IFNs) are a group of signaling proteins made and released by host cells in response to the presence of pathogens, such as viruses, bacteria, parasites, or tumor cells. Interferon synthesis occurs primarily in response to viral single-stranded or double stranded RNA that are either the genetic material of RNA viruses or a product of viral transcription. Interferons are named for their ability to "interfere" with viral replication by protecting cells from virus infections. |
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| 1361. |
The resources which are obtained from bio sphere and have life are – |
| A. | Potential resources |
| B. | Biotic resources |
| C. | Abiatic resources |
| D. | Renewable resources |
| Answer» B. Biotic resources | |
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Explanation: Biotic resources describe living or once living resources of a community; for example organisms, such as plants and animals. They are obtained from the biosphere and have life. The resources which are composed of non- living things are called Abiotic Re-sources. For example, water, minerals, metals, wind, solar energy etc. |
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| 1362. |
Which of the following is a fibrous protein? |
| A. | Haemoglobin |
| B. | Albumin |
| C. | Keratin |
| D. | Enzymes |
| Answer» C. Keratin | |
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Explanation: Keratin is a family of fibrous structural proteins. It is the key structural material making up the outer layer of human skin. It is also the key structural component of hair and nails. Another example of fibrous protein is collagen. |
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| 1363. |
Typhoid fever is caused by – |
| A. | Bacteria |
| B. | Virus |
| C. | Protozoa |
| D. | Fwagi |
| Answer» A. Bacteria | |
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Explanation: Typhoid fever is an infection that causes diarrhea and a rash. It is most commonly due to a type of bacterium called Salmonella typhi (S. typhi). S. typhi is spread through contaminated food, drink, or water. |
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| 1364. |
Pleura is the covering of – |
| A. | Lung |
| B. | Liver |
| C. | Kidney |
| D. | Heart |
| Answer» A. Lung | |
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Explanation: Pleura is a large, thin sheet of tissue that wraps around the outside of lungs. It is an exceedingly delicate serous membrane that is arranged in the form of a closed invaginated sac. The pleura are only visible when there is an abnormality present. |
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| 1365. |
Which drug is used to cure Glaucoma? |
| A. | Fexofenadine |
| B. | Ketoconazole |
| C. | Latanoprost |
| D. | Ibuprofen |
| Answer» C. Latanoprost | |
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Explanation: Latanoprost, sold under the brand name Xalatan, is a medication used to treat increased pressure inside the eye. This includes ocular hypertension and open angle glaucoma. |
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| 1366. |
German Silver is an alloy of – |
| A. | Copper, Silver and Zinc |
| B. | Copper, Nickel and Zinc |
| C. | Mid-brain |
| D. | Fore-brain |
| Answer» B. Copper, Nickel and Zinc | |
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Explanation: German Silver (also known as New Silver, Nickel Brass, etc) is a copper alloy with nickel and often zinc. |
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| 1367. |
The first stable product of photosynthesis is – |
| A. | Starch |
| B. | Sucrose |
| C. | Phosphoglyceric acid |
| D. | Glucose |
| Answer» C. Phosphoglyceric acid | |
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Explanation: The first product of photosynthesis is a three-carbon compound called phosphoglyceric acid and phosphoglyceraldehyde. Almost immediately, two of these join to form a glucose molecule. Certain herbaceous plants such as sugarcane, corn, and sorghum, form as the first products of photosynthesis not three-carbon but four-carbon compounds— oxalacetic, malic, and aspartic acids. |
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| 1368. |
The old and worn-out red blood corpuscles are destroyed in |
| A. | Liver |
| B. | Stomach |
| C. | Bone marrow |
| D. | Spleen |
| Answer» D. Spleen | |
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Explanation: Old, "worn out" RBCs are mostly broken down in the spleen. It is the organ that filters the blood, checks it for infection, and removes undesirable substances. RBCs are produced in the red bone marrow of bones. The average life span of erythrocytes is about 120 days. |
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| 1369. |
Self pollination will lead to – |
| A. | inbreeding |
| B. | rare breeding |
| C. | overbreeding |
| D. | outbreeding |
| Answer» A. inbreeding | |
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Explanation: Self-pollination can lead to inbreeding depression, or the reduced health of the species, due to the breeding of related specimens. This is why many flowers that could potentially self-pollinate have a built-in mechanism to avoid it. |
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| 1370. |
In any spreadsheet, the address of the first cell is - |
| A. | OA |
| B. | TIA |
| C. | AO |
| D. | Al |
| Answer» D. Al | |
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Explanation: There are rows and columns in any spreadsheet. Each column has a capital letter on the top to show what column it is. Each row has a number to the immediate left of the first column, to show what row it is. So address of the cell in the first column, first row is Al. |
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| 1371. |
Which one of the following is correctly matched? |
| A. | Secondary consumer - Grass |
| B. | Decomposer - Bacteria |
| C. | Producer - Deer |
| D. | Primary consumer - Leopard |
| Answer» B. Decomposer - Bacteria | |
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Explanation: When plants and animals die, they become food for decomposers like bacteria, fungi and earthworms. The dead things that are eaten by decomposers are called detritus which means "garbage". |
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| 1372. |
When a single gene controls the expression of more than one character, it is said to be - |
| A. | Heterotrophic |
| B. | Autotrophic |
| C. | Allotropic |
| D. | Pleiotropic |
| Answer» D. Pleiotropic | |
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Explanation: When a single gene has an effect on the expression of two or more phenotypic traits, it is said to have a pleiotropic effect on the traits. For example, testosterone controls the development of what are referred to as secondary sexual characteristics, but it also relates to behavioral traits like aggression. Thus, a gene that controls the levels of testosterone would have a pleiotropic effect on the expression of many secondary sexual traits which are morphological, as well as behavioral. |
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| 1373. |
The plants which grow well, only in light are known as – |
| A. | Sciophilous |
| B. | Xerophytes |
| C. | Heliophytes |
| D. | Epiphytes |
| Answer» C. Heliophytes | |
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Explanation: In botany, heliophytes refer to plants that thrive in bright sunlight; while those growing best in shade are known as sciophytes. Heliophytes are capable of a more efficient use of high light intensities than sciophytes. Examples of heliophytes are sugar cane, sunflower and maize. |
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| 1374. |
Green blocks are referred to – |
| A. | Green cover |
| B. | Green Ministry |
| C. | Bio-bricks |
| D. | Pro-biotic curd |
| Answer» C. Bio-bricks | |
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Explanation: Green Blocks are comprised of blocks throughout the neighborhood that pledge to be greener by working together to improve quality of life, clean, and beautify 'their neighborhood. They are also known as bio- bricks. |
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| 1375. |
Which one of the following is an egg laying mammal? |
| A. | Sloth |
| B. | Duck - billed platypus |
| C. | Kangaroo |
| D. | Bandicoot |
| Answer» B. Duck - billed platypus | |
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Explanation: Theplatvpus, also known as the duck-billed platypus is a semi-aquatic egg- laying mammal endemic to eastern Australia. It is one of the five extant species of monotrernes, the only mammals that lay eggs instead of giving birth. |
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| 1376. |
The type of kidneys present in frog are |
| A. | Mesonephros |
| B. | Metanephros |
| C. | Archinephros |
| D. | Pronephros |
| Answer» A. Mesonephros | |
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Explanation: In the frog, mesonephros is the functional kidney in embryonic as well as adult stage and mesonephric duct functions as both urinary and genital duct. Tubules of the anterior region of kidney get connected to testis to collect spermatozoa. while the posterior region remains as functional kidney and transports urinary wastes to the exterior. |
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| 1377. |
The International Commisson on Zoological Nomenclature was established in |
| A. | 1895 |
| B. | 1988 |
| C. | 2001 |
| D. | 1664 |
| Answer» A. 1895 | |
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Explanation: The International Commission on Zoological Nomenclature (ICZN) was founded in 1895. It provides and regulates a uniform system of zoological nomenclature ensuring that every animal has a unique and universally accepted scientific name. |
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| 1378. |
Carolus Linnaeus System of classification is – |
| A. | Natural |
| B. | Artificial |
| C. | Binomial |
| D. | Phylogenetic |
| Answer» C. Binomial | |
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Explanation: Swedish naturalist Carl Linnaeus established the binomial system of naming living organisms, setting a format and a structured process for classifying the interrelationships between plants (among which he included all fungi), and between animals. The binomial system that Linnaeus devised enables an author to refer to a species confident that it will mean the same thing to informed readers anywhere else in the world. |
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| 1379. |
The hydrophilic nature of DNA is due to the presence of – |
| A. | thymine base |
| B. | Biotic resources |
| C. | phosphate group |
| D. | deoxyribose sugar |
| Answer» B. Biotic resources | |
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Explanation: The phosphate groups on DNA are ionic and charged. Each phosphategroup 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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| 1380. |
Which of the following plant shows chloroplast dimorphism? |
| A. | Sugar beet |
| B. | Rice |
| C. | Wheat |
| D. | Sugarcane |
| Answer» D. Sugarcane | |
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Explanation: Certain plans which possess the C4 dicarboxylic acid pathway of CO2 fixations show a structural dimorphism of chloroplast structure. Sugarcane is a common example of C4 plant that has dimorphic chloroplast. The mesophyll cells possess chloroplasts with well developed grana whereas the bundle sheath chloroplasts lack the organization of grana (Agranal chloroplasts). The malic acid is transported to the bundle sheath chloroplast (Transportations). Here it is converted to pyruvic acid and CO2 by NADP+ malic enzyme (Decarboxylation). The pyruvic acid is then transported to mesophyll chloroplasts (Transportation). |
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| 1381. |
The gene which exhibites multiple effects is known as – |
| A. | Pseudogene |
| B. | Pleiotropic |
| C. | Complementary |
| D. | Polygene |
| Answer» B. Pleiotropic | |
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Explanation: Pleiotropy describes the genetic effect of a single gene on multiple phenotypic traits. The underlying mechanism is that the gene codes for a product that is, for example, used by various cells, or has a signaling function on various targets. A classic example of pleiotropy is phenylketonuria, a human disease that affects multiple systems but is caused by one gene defect. |
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| 1382. |
The deficiency of vitamin A causes – |
| A. | night blindness |
| B. | beriberi |
| C. | rickets |
| D. | pellagra |
| Answer» A. night blindness | |
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Explanation: Nyctalopia (night blindness) is a condition making it difficult or impossible to see in relatively low light. It is one of the first signs of Vitamin A deficiency. Xerophthalmia, keratomalacia, and complete blindness can also occur since Vitamin A has a major role in phototransduction. |
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| 1383. |
The use of heat treatment of ore that includes smelting and roasting is termed as - |
| A. | Electrometallurgy |
| B. | Hydrometallurgy |
| C. | Pyrometallurgy |
| D. | Cryometallurgy |
| Answer» C. Pyrometallurgy | |
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Explanation: Pyrometallurgy consists of the thermal treatment of minerals and metallurgical ores and concentrates to bring about physical and chemical transformations in the materials to enable recovery of valuable metals. During pyrometallic processing, an ore after being beneficiated (concentrated by crushing, grinding, floating and drying), is sintered or roasted (calcined) with other materials such as baghouse dust and flux. The concentrate is then smelted, or melted, in a blast furnace in order to fuse the desired metals into impure molten bullion. |
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| 1384. |
Which one of the following is not an artificial sweetener? |
| A. | Fructose |
| B. | Saccharin |
| C. | Sucralose |
| D. | Aspartame |
| Answer» A. Fructose | |
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Explanation: Some of the examples of artificial sweeteners include: acesulfame K, aspartame, neotame, saccharin, sucralose, etc. Fructose is a natural simple sugar found in fruits, honey, and vegetables. It is one of the three dietary monosaccharides, along with glucose and galactose. |
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| 1385. |
Which one of the following sub-stances is normally found in urine? |
| A. | blood proteins |
| B. | creatinine |
| C. | red blood cells Fir |
| D. | white blood cells rniw |
| Answer» B. creatinine | |
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Explanation: Creatinine is a chemical waste molecule that is generated from muscle metabolism. It is transported through the bloodstream to the kidneys. The kidneys filter out most of the creatinine and dispose of it in the urine. High levels of creatinine warn of possible malfunction or failure of the kidneys. |
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| 1386. |
Leptospirosis is a disease caused by – |
| A. | Virus |
| B. | Fungus |
| C. | Protozoa |
| D. | None |
| Answer» D. None | |
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Explanation: Leptospirosis is a bacterial disease caused by cork-screw-shaped bacteria called Leptospira. Signs and symptoms can range from none to mild such as head-aches, muscle pains, and fevers; to severe with bleeding from the lungs or meningitis. If the infection causes the person to turn yellow, have kidney failure and bleeding, it is then known as Weil's disease. |
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| 1387. |
Hepatitis affects which organ of the human body? |
| A. | Liver |
| B. | Pancreas |
| C. | Spleen |
| D. | Small intestine |
| Answer» A. Liver | |
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Explanation: Hepatitis refers to an inflammatory condition of the liver. It is commonly caused by a viral infection. Other causes include heavy alcohol use, certain medications, toxins, other infections, and autoimmune diseases, and non-alcoholic steatohepatitis (NASH). There are five main types of viral hepatitis; type A, B, C, D, and E. |
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| 1388. |
Why is Rann of Kutch of India famous for? |
| A. | Tidal and flats |
| B. | Fertile soil |
| C. | Dense Vegetation |
| D. | All are correct |
| Answer» A. Tidal and flats | |
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Explanation: The Great Rann of Kutch is a seasonal salt marsh located in the Thar Desert in the Kutch District of Gujarat, India and the Sindh province of Pakistan. It is known for its marshland and mud flats, also known as tidal flats, that are coastal wetlands which form when mud is deposited by tides or rivers. |
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| 1389. |
Azolla increases soil fertility for – |
| A. | maize cultivation |
| B. | wheat cultivation |
| C. | barley cultivation |
| D. | rice cultivation |
| Answer» D. rice cultivation | |
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Explanation: The nitrogen-fixing capability of Azolla has led to it being widely used as a biofertiliser for increasing the productivity of rice fields. When rice paddies are flooded in the spring, they can be inoculated with Azolla., which then quickly multiplies to cover the water, suppressing weeds. |
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| 1390. |
Haematopoiesis take place in – |
| A. | Lungs |
| B. | Pancreas |
| C. | Liver |
| D. | Bone marrow |
| Answer» D. Bone marrow | |
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Explanation: Haematopoiesisis the formation of blood cellular components. The sites where haematopoiesis occurs change during embryonic development, but in adult mammals, the bone marrow is the major site of haematopoiesis. Haematopoietic stem cells in the bone marrow reside in a specialised microenvironment known as the hematopoietic stem cell niche, com-posed of osteoblasts, mesenchymal cells and sinusoidal vessels. |
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| 1391. |
is a hormone that regulates the amount of glucose in the blood? |
| A. | Glucogen |
| B. | Thyroxine |
| C. | Oxytocin |
| D. | Insulin |
| Answer» D. Insulin | |
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Explanation: Insulin is a hormone that allows our body to use sugar (glucose) from carbohydrates in the food that we eat for energy or to store glucose for future use. Insulin helps keeps our blood sugar level from getting too high (hyperglycemia) or too low (hypoglycemia), Insulin is a peptide hormone produced by beta cells of the pancreatic islets. |
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| 1392. |
What is main root of plants called as? |
| A. | Tap root |
| B. | Lateral roots |
| C. | Fibrous roots |
| D. | Anchor |
| Answer» A. Tap root | |
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Explanation: A taproot is a large, central, and dominant root from which other roots sprout laterally. |
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| 1393. |
For digestion of fat, bile is needed. This is secreted by the – |
| A. | stomach |
| B. | pituitary gland |
| C. | pancreas |
| D. | liver |
| Answer» D. liver | |
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Explanation: 0 |
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| 1394. |
Which is the largest gland in human body? |
| A. | Liver |
| B. | Thyroid |
| C. | Pituitary gland |
| D. | Saliatary |
| Answer» A. Liver | |
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Explanation: Liver is the largest gland in human body. It is also the largest (internal) organ in our body and can weigh up to 1.5-1.6 kg for a human adult. The large size of the liver is matched by its functional complexity and involvement in a diverse array of regulatory mechanisms. It plays a major role in regulation of glycogen storage, decomposition of red blood cells, plasma protein synthesis, hormone production, and detoxification. |
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| 1395. |
Which organ of human body secretes Insulin? |
| A. | Pancreas |
| B. | Kidney |
| C. | Gall bladder |
| D. | Liver |
| Answer» A. Pancreas | |
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Explanation: Insulin is a hormone secreted by the pancreas that is important for metabolism and utilization of energy from the ingested nutrients - especially glucose. It keeps our blood sugar level from getting too high (hyperglycemia) or too low (hypoglycemia). The pancreas is a glandular organ in the digestive system and endocrine system of vertebrates. |
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| 1396. |
Solar energy is converted into chemical energy during – |
| A. | Combustion |
| B. | Transition |
| C. | Photosynthesis |
| D. | Fusion |
| Answer» C. Photosynthesis | |
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Explanation: Photosynthesis in plants convertsQ.38) radiant energy from the sun into chemical energy in the form of glucose (sugar) using electrons and protons from water. Plants take in water, carbon dioxide, and sunlight and turn them into glucose and oxygen. |
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| 1397. |
Which one of the following is not the excretory organ? |
| A. | Kidneys |
| B. | Liver |
| C. | Lungs |
| D. | Spleen |
| Answer» D. Spleen | |
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Explanation: The excretory system is a collection of organs tasked with removing excess nitrogen and other toxins from the body. Several parts of the body such as sweat glands (excretion of sweat), liver (detoxifies and breaks down chemicals, poisons and other toxins that enter the body), lungs (disposal of carbon dioxide through exhalation) and kidneys (excretion of waste through urinary system) are involved in this process. The spleen is the organ that is responsible for both the storage and purification of red blood cells. |
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| 1398. |
Which one of the following is an insectivorous plant? |
| A. | Utricularia |
| B. | Sequoia Gigantia |
| C. | Nostoc |
| D. | Bryophyta |
| Answer» A. Utricularia | |
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Explanation: Utricularia (also called bladderworts) is a genus of carnivorous plants. They occur in fresh water and wet soil as terrestrial or aquatic species. All Utricularia are carnivorous and capture small organisms by means of bladder-like traps. Terrestrial species feed on protozoa and rotifers swimming in watersaturated soil' while aquatic species feed on water fleas (Daphnia), nematodes and even fish fry, mosquito larvae and young tadpoles.polysaccharide of glucose that serves as a form of energy storage in animals and fungi. |
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| 1399. |
Mechanism preventing interbreeding is called – |
| A. | Adaptation |
| B. | Isolation |
| C. | Reproduction |
| D. | Recombination |
| Answer» B. Isolation | |
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Explanation: Because interbreeding can destroy the genetic integrity of a species, causing it to become progressively infertile or extinct, evolutionary changes in anatomy and biology developed to prevent interbreeding between species. The specific term is Reproductive Isolation, which acts to prevent some, any, or all stages of reproduction from occurring. Reproductive Isolation is very important in keeping animal species separated. |
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| 1400. |
Biodegradable wastes can usually be converted into useful substances with the help of - |
| A. | Bacteria |
| B. | Nuclear proteins |
| C. | Radioactive substances |
| D. | Viruses |
| Answer» A. Bacteria | |
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Explanation: Biodegradable waste includes any organic matter in waste which can be broken down into carbon dioxide, water, methane or simple organic molecules by micro-organisms such as bacteria. Biodegradable waste can be used for composting or a resource for heat, electricity and fuel by means of incineration or anaerobic digestion. |
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