InterviewSolution
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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. |
Bacteriphages killA. fungiB. parasitesC. bacteriaD. viruses |
| Answer» Correct Answer - C | |
| 652. |
When domestic sewage mixes with river waterA. small animals like rats will die after drinking river waterB. the increased microbial activity releases micronutrients such as ironC. the increased microbial activity uses up dissolved oxygenD. the river water is still suitable for drinking as impurities are only about `0.1%`. |
| Answer» Correct Answer - C | |
| 653. |
when domestic sewage mixes with water ,A. small animals such as rats will die after drinking river waterB. the increased micorobial activity relases micronutrients such as ironC. the increased microbial actvity uses up dissolved oxygenD. the river water is still suitable for drinking as impuphorus are only about 0.1% |
| Answer» Correct Answer - C | |
| 654. |
when domestic sewage mixes with water ,A. Small animals like rats will die after drinking river water.B. The increased microbial activity releases micronutrients such as iron.C. The increased microbial activity uses up dissolved oxyen.D. The river water is still suitable for drinking as impurities are only about 0.1%. |
| Answer» Correct Answer - C | |
| 655. |
Select the correct combination of the statements (a-d) regarding the characteristics of certain organismsA. Methanogens are archaebacteria which produce methane in marshy areas.B. Nostoc is a filamentous blue green alga which fixes atmospheric nitrogen.C. Chemosynthetic autotrophic bacteria synthesise cellulose from glucose.D. Mycoplasma lacks a cell wall and can survive |
| Answer» Correct Answer - D | |
| 656. |
The introduction of t-DNA into plants involvesA. Allowing the plant roots to stand in waterB. Infection of the plant by Agrobacterium tumefaciensC. Altering the pH of the soil, then heat shocking the plantsD. Exposing the plants to cold for a brief period. |
| Answer» Correct Answer - B | |
| 657. |
Bioreactors are useful inA. separation and purification of a productB. processing of large volumes of cultureC. isolation of genetic materialD. none of these |
| Answer» Correct Answer - B | |
| 658. |
Microorganisms can be grown in the bioreactors byA. support growth systemB. agitated growth systemC. suspended growth systemD. both (1) and (3) |
| Answer» Correct Answer - 4 | |
| 659. |
Cry 1 endotoxins obtins obtained from Bacillus thuringiensis are efficetive againstA. NematodesB. Boll worsC. MosquitoesD. Flies |
| Answer» Correct Answer - B | |
| 660. |
Match the following and find the correct option A. a-iv, b-i, c-ii, d-iiiB. a-iii, b-i, c-iv, d-iiC. a-iii, b-ii, c-i, d-ivD. a-iii, b-iv, c-i, d-ii |
| Answer» Correct Answer - D | |
| 661. |
A bioreactors refers toA. fermentation tankB. tank for biochemical reactionsC. organisms reacting to a stimulusD. nuclear reactor for biological studies |
| Answer» Correct Answer - A | |
| 662. |
Fermentation consists of three steps . The correct sequence is :A. Inoculation , sterilisation and inoculationB. Product recovery , sterilisation and inoculationC. Sterilisation, inoculation and product recoveryD. Sterilisation , product recovery and inoculation |
| Answer» Correct Answer - C | |
| 663. |
The following change is observed due to addition of hops is bear wart during fermentationA. ColourB. FlavourC. Mild antibacterial activityD. All the above |
| Answer» Correct Answer - D | |
| 664. |
If wheat field is inoculated with RhizobiumA. Soil with become nitrogen richB. No effect on soil nitrogenC. Soil will be deplected of nitrogenD. Soil will become rich in calcium |
| Answer» Correct Answer - B | |
| 665. |
If wheat field is inoculated with RhizobiumA. Soil will become nitrogen richB. No effect on soil nitrogenC. Soil will be depleted of nitrogenD. Soil will become rich in calcium |
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Answer» Correct Answer - B If wheat field is inoculated with Rhizobium there is no effect on soil nitrogen. |
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| 666. |
Which of the following acts as biofertiliserA. NostocB. RhizobiumC. MycorrhizaD. All of the above |
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Answer» Correct Answer - D Nostoc,Rhizobium and Mycorrhiza acts as biofertiliser. |
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| 667. |
Assertion:Besides macroscopic plants and animals, microbes are the major components of biological systems on this earth. Reason: Microbes causea large number of diseases in humans, plants and animals.A. If both assertion and reason are trueand the reason is the correct explanation of the assrertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion istrue but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - B `*` Besides macroscopic plants and animals, microbes are the major components of biological systems on this earth. `*` Microbes causes a large number of diseases in humans, plants and animals. |
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| 668. |
Assertion: Not all the microbes are harmful, several microbes are useful to man in diverse ways. Reason: Microbes are used to ferment fish, soyabean and bamboo-shoot to make food.A. If both assertion and reason are trueand the reason is the correct explanation of the assrertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion istrue but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - A `*` Not all the microbes are harmful, several microbes are useful to man in diverse ways as they are used to ferment fish, soyabean and bamboo-shoot to make food. |
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| 669. |
In which way have microbes played a major role in cotrolling diseages caused by harmful bacteria ? |
| Answer» Correct Answer - Microbes are the major source of antibiotic production. The antibiotics are used in crotrolling diseases caused by harmful bacteria. | |
| 670. |
Red pigment (Leghaemoglobin) having affinity for oxygen is present in the roots ofA. MustardB. SoyabeanC. CarrotD. Radish |
| Answer» Correct Answer - B | |
| 671. |
Consider the following four statemets (A - D) related to organic farming and select the correct option stating which ones are true (T) and which ones are false (F). The statements: (A) Produces food crops rich in lipids, vitamins and iron (B) Users biofertilisers which increases soil fertility (C ) There is more use of chemical fertilisers and pesticides (D) Raising unpolluted crops throuth the use of bacteria, fungi and cyanobacteriaA. `{:("(A)","(B)","(C)","(D)"),(T,T,F,F):}`B. `{:("(A)","(B)","(C)","(D)"),(F,T,F,T):}`C. `{:("(A)","(B)","(C)","(D)"),(T,F,T,F):}`D. `{:("(A)","(B)","(C)","(D)"),(T,F,F,F):}` |
| Answer» Correct Answer - 2 | |
| 672. |
Confusion technique usesA. Juvenile hormoneB. EcdysoneC. PheromoneD. A combination of hormones |
| Answer» Correct Answer - C | |
| 673. |
Ethyl alcohol si commercially manufactured fromA. WheatB. GrapesC. MaizeD. Sugarcane |
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Answer» Correct Answer - D Sugarcane (Saccharum officinarum ) is the main source of commercial etheyl alchol. Source is extracted from the juice of sugarcane as a commerical product, but this leaves a syrup called molasses which contains glucose and frutose. Ethanol is produced by the fementation of molasses by using yeast Saccharomyces cervisiae. |
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| 674. |
Antibiotics belong to the categort ofA. SteriodsB. ToxinsC. MedicinesD. Tonics |
| Answer» Correct Answer - C | |
| 675. |
Which one of the following pairs is not correctly matchedA. Spirulina -Single cell porteinB. Rhizobium - BiofertlizerC. Streptomyces -AntibioticD. Serratia -Drug addiction |
| Answer» Correct Answer - D | |
| 676. |
Streptococcus is employed in the manufacture of:A. wireB. breadC. cheeseD. all of these |
| Answer» Correct Answer - C | |
| 677. |
Streptococcus thempophilus and Lactobacillus bulgaricu are being used for the production ofA. CheeseB. TempehC. MisoD. |
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Answer» Correct Answer - B Yoghurt /yogurt produced by curdling of milk with the help of Streptococus thermophilus and Lactobacillus bulgaricus at `40-46^(@)` for four hours. |
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| 678. |
Streptococcus lactic is respondible for theA. conversion of curd into lactic acidB. making of butterC. conversion of milk into curdD. flaversion of milk into curd |
| Answer» Correct Answer - B | |
| 679. |
Commonly used microbe in alcohol industry isA. penicillumB. SaccharomycesC. RhizopusD. Puccinia |
| Answer» Correct Answer - B | |
| 680. |
Nitrogen-fixation is performed byA. green algae and fungiB. mycorrhizaC. mycoplasmaD. blue-green algen and bacteria |
| Answer» Correct Answer - D | |
| 681. |
Which bacterium produces butyric acid? |
| Answer» Clostridium butylicum. | |
| 682. |
Term Antibiotics was introduced by S.A. Waksman. Which species produce more than 60 antibioticsA. Streptomyces griseusB. Bacillus subtilisC. Penicillium notatumD. Pseudomonas |
| Answer» Correct Answer - 2 | |
| 683. |
Write the name of four deadly diseases which are treated by antibiotics? |
| Answer» Plague, whooping cough, gal ghotu, kusht rog. | |
| 684. |
When yeast ferments glucose, the products are:A. `H_2O+CO_2`B. methanol and waterC. methanol and `CO_2 `D. ethanol and `CO_2` |
| Answer» Correct Answer - 4 | |
| 685. |
Given an example of a rod-shaped virus. |
| Answer» Tabacco mosaic virus is a rod-shaped virus. This is the first plant virus to be discovered. | |
| 686. |
Name any genetically modified crop. |
| Answer» By cotton is genetically modified plant that has been modified to resist attack by insect pests e.g. cotton ball worm). These are developed by introducing a gene from Bacillus thuringiensis which produces toxin is plants which is lethat to insects. | |
| 687. |
What is the group of bacteria found in both the rumen of cattle and sludge of sewage treatment? |
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Answer» Methanogens (Methanobacterium), anaerobically break down cellulosic material to produce `CO_(2)` and `H_(2)` and are found in (i) Anaerobic sludge in sewage treatment plants. (ii) Rumen (a part of stomach) to cattles, thus providing nutrition to cattles. |
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| 688. |
What is the source organism for Eco RI, restriction endonuclease? |
| Answer» Escherichia coli strain RY 13 is the source organism for Eco RI. | |
| 689. |
What would happen if our intestine harbours microbial flora exactly similar to that found in the rumen of cattle? |
| Answer» It our intestine harbors microbial flora exactly similar to that found in the rumen to cattle, we would be able to digest the cellulose present in our foods because the microbes present in the rumen (a part of stomach) of cattle, collectively called methanogens, are capable of digesting cellulose as they have cellulase enzyme. | |
| 690. |
Mark the correct option (w.r.t. composition of biogas)A. `50-70% H_(2)`B. `30-40% CO_(2)`C. `95% CH_(4)`D. `10%CO` |
| Answer» Correct Answer - B | |
| 691. |
Which one of the following is not a nitrogen-fixing organism ?A. NostocB. AnabaenaC. AzotobacterD. Pseudomonas |
| Answer» Correct Answer - D | |
| 692. |
Which one of the following is not a nitrogen-fixing organism ?A. AnabaenaB. NostocC. AzotobacterD. Pseudomonas |
| Answer» Correct Answer - d | |
| 693. |
Do you think microbes can also be used as source of energy? If yes, how? |
| Answer» Correct Answer - Yes, the microbes present in activated sludge are digested anaerobically to generate an inflammable biogas which is used as source of energy. | |
| 694. |
Which one of the following gropus of bacteria supplies notrogen to tur crop plants irresective of crop retation or manuring ?A. NitrosomonasB. NitrobacterC. RhizobiumD. All of them |
| Answer» Correct Answer - D | |
| 695. |
Most common nitrogen - fixing cyanobacterium of paddy fields isA. CylindrospermumB. AulosriaC. OscillatoriaD. Nostoc |
| Answer» Correct Answer - B | |
| 696. |
Streptomyces venezuelae yieldsA. aureomycinB. chloromycetinC. tetracyclineD. streptomycin |
| Answer» Correct Answer - B | |
| 697. |
Bt-cotton is resistant to:A. insectsB. herbicidesC. saltD. drought |
| Answer» Correct Answer - 1 | |
| 698. |
Oxytetracycline is another name for:A. PenicillinB. TerramycinC. NeomycinD. Streptomycin |
| Answer» Correct Answer - B | |
| 699. |
Streptomyces venezuelae is used to obtain:A. AureomycinB. TetracyclineC. StreptomycinD. Chloramphenicol |
| Answer» Correct Answer - D | |
| 700. |
Assertion. The antibiotics produced by Streptomyces species have found greatest commercial application. Reason: Some of the important life saving antibiotics such as penicillia and polymixia-B are produced by streptomyces.A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.C. If Assertion is true but the Reason is false.D. If both Assertion and Reason are false. |
| Answer» Correct Answer - C | |