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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 651. |
Which one of the following statement is not valid for aerosols ?A. They are harmful to human healthB. They alter rainfall and monsoon patternsC. They cause increased agricultural productivity.D. They have negative impact on agricultural land |
| Answer» Correct Answer - C | |
| 652. |
Match the items given in column I with those in column II and select the correct option given below. `{:("Column I", "Column II"), ("A. Eutrophication", "(i) UV-B radiation"), ("B. Sanitary landfill", "(ii) Deforestation"), ("C. Snow blindness", "(iii) Nutrient enrichment"), ("D. Jhum cultivation", "iv Waste disposal"):}`A. `{:(A, B, C, D), (""(ii), (i), (iii), (iv)):}`B. `{:(A, B, C, D), (""(i), (iii), (iv), (ii)):}`C. `{:(A, B, C, D), (""(iii), (iv), (i), (ii)):}`D. `{:(A, B, C, D), (""(i), (ii), (iv), (iii)):}` |
| Answer» Correct Answer - C | |
| 653. |
The ultimate environmental hazard to mankind is:A. Air pollutionB. Water pollutionC. Noise pollutionD. Nuclear winter |
| Answer» Correct Answer - D | |
| 654. |
Linkage in Drosophila was first discovered byA. BridgesB. MendelC. Bateson and PunnetD. Morgan |
| Answer» Correct Answer - D | |
| 655. |
Genes located on X-chromosomes are calledA. Sex influncedB. Sex limitedC. Sex linkedD. Maternal genes |
| Answer» Correct Answer - C | |
| 656. |
In Neurospora both recessive and dominant allels express their effect becacuseA. Two genes control each characterB. There are two alleles for each characterC. The organism contains only one allele for a geneD. Each gene has only one allele |
| Answer» Correct Answer - C | |
| 657. |
$ Air pollutants are always gaseous. ! Ultraviolet rays do not cause any harm to the human beings.A. If both As and R are correct and R is correct explanation of AsB. If both As and R are correct but R is not correct explanation of AsC. If As is correct, R is wrongD. If both As and R are wrong. |
| Answer» Correct Answer - D | |
| 658. |
CO is a pollutant because itA. inactivates nervesB. combines with oxygenC. combines with HbD. inhibits growth |
| Answer» Correct Answer - B | |
| 659. |
The loudness of a sound that a person can withstand without discomfort is aboutA. 150 dBB. 215 dBC. 30 dBD. 80 dB |
| Answer» Correct Answer - D | |
| 660. |
The gas which was released in Bhopal gas tragedy wasA. ethyleneB. methyl isocyanateC. mustard gasD. potassium isocyanate |
| Answer» Correct Answer - B | |
| 661. |
A person with bleeding gums should add to his daily dietA. Vitamin AB. Vitamin BC. Vitamin CD. Vitamin D |
| Answer» Correct Answer - C | |
| 662. |
$ Rhodopsin of rod cells and iodospin of cone cells of retina are proteins ! Myosine and Actin are contractile proteinsA. If both As and R are correct and R is correct explanation of AsB. If both As and R are correct but R is not correct explanation of AsC. If As is correct, R is wrongD. If both As and R are wrong. |
| Answer» Correct Answer - B | |
| 663. |
Fourteen Biosphere reserve have been planned in india. |
| Answer» Correct Answer - T | |
| 664. |
Deforestation makes floods and droughts more frequent. |
| Answer» Correct Answer - T | |
| 665. |
Expand BPO |
| Answer» Biochemical oxygen demand. | |
| 666. |
Air pollution is not reduced byA. Using precipitatorsB. Resusing wastesC. Cleaning airD. all the above |
| Answer» Correct Answer - D | |
| 667. |
Detergents often containA. BleachB. FluorescersC. PerboratesD. All the above |
| Answer» Correct Answer - D | |
| 668. |
The given graph shows how much nitrate `(NO_(3)^(-))` is exported from the continent towards the ocean by 16 major rivers in the world rivers in the world compared to the density of human populations living along those drainage basins (i.e., along these rivers). What interpretation can be drawn from this graph ? A. Nitrate exported through rivers from heavily populated cities can cause eutrophication and toxic algal bloom in marine coastal regions.B. Small drainage basins export more `NO_(3)^(-)`.C. Drainage basins with higher populstion densities export lesser `NO_(3)^(-)`.D. both (a) and (c ) |
| Answer» Correct Answer - A | |
| 669. |
The graph given below represents changes in different ecological parameters due to effluent mixing in a stream. The three lines A, B anc C represent A. A: oxygen concentration B: biological `O_(2)` demand C: pollution resistant speciesB. A: pollutan B: aerobic process C: anaerobic processC. A: oxygen concentration B: `CO_(2)` concentration C: termperatureD. A: phosphate concentration B: nitrate concentration C: rate of photosynthesis. |
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Answer» Correct Answer - A Effluent discharge mixing into a river will result in rise of BOD because decomposer organisms consume a lot of oxygen. If sewage quantity is large, the whole of dissolved oxygen may be consumed leaving nothe for respiration of fish and other clean water organisms. They, therfore, get killed. However, as sewage is decomposed, there is a gradual rise in dissolved oxygen downstream. Fish and other clean water organisms reappear indicating the recovery of river from sewage pollution. Meanwhile, number of pollution resistant species increases in the stream. |
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| 670. |
In the event of global warming, which one of the following is most likely to occur ?A. Existing plant and animal communities will move North in reponse to warming.B. Agriculture in the Prairie provinces will be redeveloped on soils of the Canadian Shield.C. The anticipated rise in sea level will be caused primarily by the melting of polar ice caps.D. The decomposition of organic matter in the unfrozen surface layer of polar soils will increase. |
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Answer» Correct Answer - C It is believed that increase in concentration of greenhouse gases has resulted in rise of atmospheric temperature which is slight in tropics, moderate in middle latitudes and maximum in polar regions. Global warming could raise sea level due to thermal expansion of sea water, melting of glaciers and Greenland ice sheet.There is a danger of submersion of large area s one third of human population lives within 60 km of coastline. Coastal salt marshes and estuaries, wetlands, drylands, freshwater supplies, fisheries, fish breding areas and other types of wildlife will undergo extinction. |
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| 671. |
The concentration of polychlorinated biphenyls (PCB, an organochloride contaminant) in many fish population has been declining, since a ban on their production was instituted in the late 1970s. PCBs remain a potential problem, however, because they are lipophilic and are know to biomagnify. Based on this knowledge, what type of fish is expected to be safest for human consumption ?A. Piscivorous fish species (i.e., which eat other fish)B. Benthivorous fish species (i.e., which eat invertebrates on the lake bottom )C. Small (young ) fishD. Fish species with high fat content |
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Answer» Correct Answer - C Heavy metals and persistent pesticides (e.g., organochlorine or chlorinated hydrocarbons like DDT) pass into food chain and increase in amount per unit weight of organisms with the rise in trophic level due to theiraccumulation in fat. This phenomenon is called biomagnification. Therefore, lower the trophic level of fish (such as small fish), lesser will be the biomagnification and hence safer it will be for consumption. |
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| 672. |
Use of polychlorinated biphenyl is restricted because of theirA. Extreme toxicityB. Persistent toxicityC. BiomagnificationD. Both B and C |
| Answer» Correct Answer - D | |
| 673. |
Polychlorinated biphenyls are chemicals useful isA. Fire-resistantsB. FertilisersC. PesticidesD. Germicides |
| Answer» Correct Answer - A | |
| 674. |
Fog is formed byA. SmokeB. Condensation of water vapoursC. Condensation of water vapours over dust particlesD. Both A and C |
| Answer» Correct Answer - C | |
| 675. |
Biggest oil spill occurred inA. March 1989 off Alaska by Exxon ValdezB. 1968 off south America by World GloryC. October 1997 off SingaporeD. February 1991 in Persian Gulf. |
| Answer» Correct Answer - D | |
| 676. |
Fluoride content of water which causes fluorosis isA. 6 ppbB. 100 ppbC. 1 ppmD. 10 ppm |
| Answer» Correct Answer - D | |
| 677. |
Which is not a bioidicator of water pollutionA. Blood wormsB. Stone fliesC. Sewage fungusD. Sludge worms. |
| Answer» Correct Answer - B | |
| 678. |
$ Photosynthesis roots are a type of Tap Root System. ! Anoxygenic photosynthesi is performed by photosynthetic roots.A. If both As and R are correct and R is correct explanation of AsB. If both As and R are correct but R is not correct explanation of AsC. If As is correct, R is wrongD. If both As and R are wrong. |
| Answer» Correct Answer - D | |
| 679. |
$ Temperature is an important factors for growth. ! High temperature increses the diameter of Tap root.A. If both As and R are correct and R is correct explanation of AsB. If both As and R are correct but R is not correct explanation of AsC. If As is correct, R is wrongD. If both As and R are wrong. |
| Answer» Correct Answer - C | |
| 680. |
Gases that are commonly known as green house gases:-A. `CO_(2)` and `CH_(4)`B. `NO_(2)` and CFCsC. ozoneD. All the above |
| Answer» Correct Answer - D | |
| 681. |
State the cause of Accelerated Eutrophications. |
| Answer» Pollutants from human activities/effluents from industries/home/sewage/agricultural wastes radically accelerate the ageing process. | |
| 682. |
Greenhouse effect is warming due toA. Infra-red rays reaching earthB. Moisture layer in atmosphereC. Increase in temperature due to increase in carbon dioxide concentration of atmosphereD. Ozone layer of atmosphere |
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Answer» Correct Answer - C Greenhouse effect is wanning due to increase in temperature due to increase In carbon dioxIde concentration of atmosphere. |
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| 683. |
Global warming leads toA. Deleterious changes in the environment and resulting in odd climatic changes (e.g. El Nino effect)B. Increased melting of polar ice caps and Himalayan snow capsC. Rise in the sea level that can submerge many coastal areas.D. All of the above |
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Answer» Correct Answer - D Global warming leads to: Deleterious changes in the environment and resulting in odd climatic changes (e.g.. El Nino effect). Increased melting of polar ice caps and Himalayan snow caps. Rise in the sea level that can submerge many coastal areas. |
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| 684. |
During the past century the temperature of Earth has increased byA. `0.6^@C`, most of it during the last two decadesB. `0.5^@C`, most of it during the last two decadesC. `0.6^@C`, most of it during the last three decadesD. `0.5^@C`, most of it during the last three decades |
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Answer» Correct Answer - C During the past century, the temperature of Earth has increased by 0.6°C, most of it during the last three decades. |
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| 685. |
Increase in level of greenhouse gases has led to considerable heating of Earth leading toA. Ozone depletionB. Skin cancerC. Global wamingD. Both A and B |
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Answer» Correct Answer - C Increase in level of greenhouse gases has led to considerable heating of Earth leading to global warming. |
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| 686. |
Which one of the following statements is not valid for aerosols?A. They alter rainfall and monsoon patternsB. They cause increased agricultural productivityC. They have negative impact on agricultural landD. They are harmful to human health |
| Answer» Correct Answer - B | |
| 687. |
Granis of major cereals and millets lack amino acidsA. Methionine and cysteineB. Methionine and lysineC. Tryoptophan and cysteineD. Lysine and troptophan |
| Answer» Correct Answer - D | |
| 688. |
Hormone replacement therapy (HRT) is carried out in case ofA. SCIDB. AIDSC. FibrillationD. Menopausal complication |
| Answer» Correct Answer - D | |
| 689. |
Inferon is useful inA. Killing virus particlesB. Protecting healty cells from viral infectionC. Killing virus infected cellsD. All the above |
| Answer» Correct Answer - B | |
| 690. |
A nonspecific immunity isA. Passive immunityB. Active immunityC. Innate immunityD. Autoimmunity |
| Answer» Correct Answer - C | |
| 691. |
Phagocytes of innate immunity areA. NeutrophilsB. MacrophagesC. MonocytesD. All the above |
| Answer» Correct Answer - D | |
| 692. |
Aquired immunity is also calledA. Adaptive immunityB. Specific immunityC. Nonspecific immunityD. Both A and B |
| Answer» Correct Answer - D | |
| 693. |
Environmental hum has a sound frequency ofA. 0.1 HzB. 1.0 HzC. 40 HzD. 100 Hz |
| Answer» Correct Answer - C | |
| 694. |
Elephants communicate with one another at a sound frequency ofA. 1.0 HzB. 15 HzC. 150 HzD. 0.1 Hz |
| Answer» Correct Answer - A | |
| 695. |
Pigeons are highly alert as they can detect a sound frequency ofA. 0.1 HzB. 1.0 HzC. 4 HzD. upto 10 Hz |
| Answer» Correct Answer - A | |
| 696. |
Range of human hearing isA. 20-400 HzB. 100-1000 HzC. 20-15000 HzD. 1000-15000 Hz |
| Answer» Correct Answer - C | |
| 697. |
Range of human hearing isA. `20-400 Hz`B. `100 - 1000 Hz`C. `20-20000 Hz`D. `1000-15000 Hz` |
| Answer» Correct Answer - C | |
| 698. |
In human body, the chlorinated hydrocarbons keep on accumulating in:A. bonesB. brainC. skinD. fatty tissue |
| Answer» Correct Answer - D | |
| 699. |
The highest DDT concentration in aquatic food chain shall occur in:A. phytoplanktonB. seagullC. crabD. eel |
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Answer» Correct Answer - B DDT is a toxic substance which gets concentrated subsequently in a food chain of an aquatic ecosystem in the following manner `underset("(0.04 ppm)")("Phytoplanktons") rarr underset("(0.5 ppm)")("Eel")rarr underset("(2 ppm)")("Crab")rarr underset("(25 ppm)")("Seagull")` Thus, the animal or organism acquiring the highest positron in a food chain would have the highest DDT concentration (here seagull). This process is known as biological magnification or biomagnification. |
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| 700. |
The term Greenhouse effect has been derived from a phenomenon that occurs in aA. House which is painted by green colourB. Greenhouse, that looks like a small glass houseC. Green house, which is covered by green glass pane ls that does not allow the light to lets inD. Both Band C |
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Answer» Correct Answer - B The term Greenhouse effect has been derived from a phenomenon that occurs in a greenhouse,that looks like a small glass house. |
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