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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.
| 851. |
Which of following microbe is most active nitrogenj fixer in rice field in India?A. RhizobiumB. RhodospirillumC. FrankiaD. Aulosira |
| Answer» Correct Answer - D | |
| 852. |
Which raw material is used in fermantation process of making beerA. Sugar in fruitsB. Starch in cerealsC. Protein in pulsesD. Starch in vegetables |
| Answer» Correct Answer - B | |
| 853. |
Which raw material is used in fermantation process of making beerA. Starch in vegetablesB. Starch in cerealsC. Sugar in fruitsD. Protein in Pulses |
| Answer» Correct Answer - B | |
| 854. |
During fermantation by yeast, alcohol is produced fromA. sugarsB. proteinsC. mocopolysaccharidesD. fats |
| Answer» Correct Answer - A | |
| 855. |
Clostridium butylicum has been used in the synthesis ofA. vitamin-BB. vitamin-AC. vitamin-CD. vitamin-D |
| Answer» Correct Answer - A | |
| 856. |
Fleming is famous for his discovery ofA. ActinomycinB. PenicillinC. ChloromycetinD. Streptomycin |
| Answer» Correct Answer - B | |
| 857. |
Woodruf (1941) were responsible for the isolation ofA. StretomycinB. PenicillinC. ActinomycinD. Neomycin |
| Answer» Correct Answer - C | |
| 858. |
Walksman and Woodruff (1941) were responsible for the isolation ofA. StreptomycinB. PencillinC. ActionomycinD. Neomycin |
| Answer» Correct Answer - A | |
| 859. |
Which of the following is not used as a biopesticide ?A. Trichoderma harzianumB. NucleopolyhedrovirusC. Xanthomonas campestrisD. Bacillus thuringiensis |
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Answer» Correct Answer - C Xanthomonas campestris is not used as a biopesticide. Bacillus thuringiensis is used as a microbial biocontrol agent. Trichoderma harzianum is a free-living fungi, common in soil and root ecosystems. It is an effective biocontrol agent of several plant pathogens. viruses of the family Baculoviruses are pathogens that attack insecs and other arthropods. The majority of baculoviruses used as biological control agents belong to genus Nucleopolyhedrovirus. |
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| 860. |
Assertion : Biofertilisers are preferred to chemical fertilisers. Reason : Chemical fertilisers are generally more expensive and hazardous to environment.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 - A | |
| 861. |
The reson that the chemical/synthetic fertilisers should be replaced by biofertilisers is that the formerA. are source of environmental pollutionB. are expensiveC. axaust the valuable energy resources for their manufactureD. all of these |
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Answer» Correct Answer - D Chemical fertilisers are being used in increasing amounts in order to increase output in high yielding varieties of crop plants. However, chemical fertilisers cause pollution of water bodies as well as ground water, besides getting stored in crop plants. They are expensive and also require lot of energy resources in their manufacture. |
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| 862. |
Assertion : Nitrogenase enzyme gets inactivated in presence of oxygen yet `N_(2)` fixation occurs in aerobic cells of legume nodules. Reason : Laghaemoglobin allows presence of oxygen just sufficient for cellular respiration only.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true but reason is falseD. If both assertion and reason are false |
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Answer» Correct Answer - A Nitrogenase enzyme is the enzyme responsible for nitrogen fixation in leguminous plants inside nodules infected by Rhizobia. This enzyme undergoes irreversibledamage in presence of oxygen and `N_(2)` fixation is stopped but the eukaryotic cells of nodules respire aerobically thus, oxygen is needed. Proper balance of oxygen amount is maintained by oxygen scavanger protein called leghaemoglobin which maintains oxygen level just sufficient for cellular respiration so the cells do not die and it remove extra oxygen to produce anaerobic atmosphere for proper functioning of nitrogenase enzyme. |
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| 863. |
Assertion : Biofertilisers are preferred to chemical fertilisers. Reason : Chemical fertilisers are generally more expensive and hazardous to environment.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true but reason is falseD. If both assertion and reason are false |
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Answer» Correct Answer - A Biofertilisers are microorganisms that are used for increasing fertility of soil. For example, free-living bacteria and cyanobacteria that fix nitrogen increase soil productivity. Biofertilisers are preferred over chemical fertilisers because chemical fertiliser are more expensive, disturb soil fauna and flora and affects soil pH. Although chemical fertilisers initiallty show better response than biofertilisers but they decreases soil fertility in the long run. |
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| 864. |
Assertion : Most orchid seedings cannot develop well in the absence of fungal mycellium. Reason : Fingal mycelium increases efficiency of abosorption onlyA. If both assertion and reason are true and reason is the correct explanation of assertionB. If both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true but reason is falseD. If both assertion and reason are false |
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Answer» Correct Answer - C Some fungi form a mutually beneficial or symbiotic association with the roots of higher plants. In seedling stage of most orchids, the fungal hyphae not only increase absorption frequenct but also provide nourishment by forming nutrient rich cells called pletons. |
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| 865. |
Expand BOD. |
| Answer» Correct Answer - Biochemical oxygen demand. | |
| 866. |
Assertion : Newer Antibiotics are required to be prosuced Regularly . Reason : Pathogens often develop resistance to existing antibiotics.A. If both Assertion and Reason are true and the reason is the correct explanation of the assertion , then mark (1) .B. If both Assertion and Reason are true but the reason is not the correct explanation of the assertion , then mark (2).C. If assertion is true but Reason is false , then false , then mark(3).D. If both assertion is true Reason are false , then Mark (4). |
| Answer» Correct Answer - A | |
| 867. |
Assertion : Cyclosporin A is antifungal and immunosup-pressive medicine Reason : It stimulates the activation of T - cells and Prevents rejections.A. If both Assertion and Reason are true and the reason is the correct explanation of the assertion , then mark (1) .B. If both Assertion and Reason are true but the reason is not the correct explanation of the assertion , then mark (2).C. If assertion is true but Reason is false , then false , then mark(3).D. If both assertion is true Reason are false , then Mark (4). |
| Answer» Correct Answer - C | |
| 868. |
Assertion : Agricultural output increased several times after the introduction of DDT . Reason : DDT was the first insecticide used on a wide scale .A. If both Assertion and Reason are true and the reason is the correct explanation of the assertion , then mark (1) .B. If both Assertion and Reason are true but the reason is not the correct explanation of the assertion , then mark (2).C. If assertion is true but Reason is false , then false , then mark(3).D. If both assertion is true Reason are false , then Mark (4). |
| Answer» Correct Answer - A | |
| 869. |
Assertion : Barley ,Sorghum , and millet are smoother crops. Reason : they factor the growth of some common weeds.A. If both Assertion and Reason are true and the reason is the correct explanation of the assertion , then mark (1) .B. If both Assertion and Reason are true but the reason is not the correct explanation of the assertion , then mark (2).C. If assertion is true but Reason is false , then false , then mark(3).D. If both assertion is true Reason are false , then Mark (4). |
| Answer» Correct Answer - C | |
| 870. |
Assertion : Barley ,Sorghum , and millet are smoother crops. Reason : they factor the growth of some common weeds.A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).C. If Assertion is true statement but Reaosn is false, then mark (3).D. If both Assertion and Reason are false statements, then mark (4). |
| Answer» Correct Answer - 3 | |
| 871. |
Assertion : Curdling is required in the manufacture of cheese. Reason : Lactic acid bacteria are used for the purpose.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 the correct explanation of the assertion.C. If the assertion is true but reasonis false.D. If both the assertion and reason are false. |
| Answer» Correct Answer - B | |
| 872. |
Select the correct statement from the followingA. Methanobacterium is an aerobic bacterium found in rumen of cattleB. Biogas commonly called gobar gas is pure methaneC. Activated sludge sediment in settling tanks of sewage treatment plant is rich source of aerobic bacteriaD. Biogas is produced by the activity of aerobic bacteria on animal waste. |
| Answer» Correct Answer - C | |
| 873. |
Safe refrigeration period isA. 1-2 daysB. 2-3 daysC. 2-4 daysD. 3-6 days |
| Answer» Correct Answer - D | |
| 874. |
Mode of action of Novobiocin isA. Induces abnormal protein synthesisB. Inhibits DNA polymerisationC. Interferes with protein synthesisD. Inhibits cell wall synthesis |
| Answer» Correct Answer - B | |
| 875. |
Why are raw foods kept below in refrigerators while cooked foods are kept aboveA. For proper handling and storageB. Cooked food requires `5^(@)C` while raw foods require `10^(@)C` for low temperature preservationC. Cooked food stays fresh at `3^(@)C` while raw foods do so at `5^(@)C`D. Cooked food fresh for longer period at `5^(@)C` while raw foods do so at `3^(@)C` |
| Answer» Correct Answer - C | |
| 876. |
A Bioenergy source obtained by fermentation to supplement fossil fuel petrol isA. ButanolB. MethanolC. EthanolD. Propanol |
| Answer» Correct Answer - C | |
| 877. |
The microe used as nutritional supplement isA. ChlorellaB. SpirulinaC. Saccharomyces cerevisiaeD. All of the above |
| Answer» Correct Answer - D | |
| 878. |
Skin disfigurement caused by dioxin isA. Chlor-acneB. UrticariaC. Dermatitis herpetiformisD. Necrosis |
| Answer» Correct Answer - A | |
| 879. |
Which of the following acids is used for skin whitening ?A. Kojic acidB. acetic acidC. Gluconic acidD. Oxalic acid |
| Answer» Correct Answer - A | |
| 880. |
Which of the following microbes have the potential fo deliver theraeutic proteins tumours gtA. S. cerevisiaeB. ClavicepsC. ClostridiaD. Both (a) and (c ) |
| Answer» Correct Answer - C | |
| 881. |
Which of the following antibiotics is used for tubeculosis ?A. StreptomycinB. ErythromycinC. PenicillinD. Polymixin |
| Answer» Correct Answer - A | |
| 882. |
Match the following Columns. A. `{:(A,B,C,D),(2,1,3,4):}`B. `{:(A,B,C,D),(1,4,3,2):}`C.D. `{:(A,B,C,D),(3,2,1,4):}` |
| Answer» Correct Answer - C | |
| 883. |
In cheese, manufacture microorgansim are important for :A. Ripening onlyB. Souring of milk onlyC. Development of resistance to spoilageD. Both souring and ripening processes |
| Answer» Correct Answer - D | |
| 884. |
Which one is the most important role of microorganism for the wellbeing of humans?A. Sewage treatmentB. Production of methaneC. Conversion of milk to curdD. Biological control of plant disease |
| Answer» Correct Answer - C | |
| 885. |
Which one is the most important role of microorganism for the wellbeing of humans?A. Sewage treatmentB. Production of methaneC. Biological control of plant diseaseD. Conversion of milk to curd |
| Answer» Correct Answer - D | |
| 886. |
Which one is the most important role of microorganism of the well being of humans?A. sewage treatmentB. production of methaneC. producion of `SO_(2)`D. conversion of milk to curd |
| Answer» Correct Answer - A | |
| 887. |
Which one of the following is not used in organic farming ?A. SmallB. GlomusC. EarthwormD. Oscillatoria |
| Answer» Correct Answer - A | |
| 888. |
Select the correct statement from the followingA. Activated sludge sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria.B. Biogas is produced by the activity of aerobic bacteria on animal wastes.C. Methanobacterium is an aerobic bacterium found in rumen of cattle.D. Biogas, commonly gobar gas is pure methane. |
| Answer» Correct Answer - A | |
| 889. |
What is obtained from cultures of streptococcus bacterium? What is the use of this product? Give its alternative name also. |
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Answer» Streptokinase is the enzyme obtained from cultures of Streptococcus and modified by genetic engineering. This enzyme is used as a clot buster for removing clots from the blood vessels through dissolution of intravascular fibrin. It is effective in those patients who have undergone mycoardial infarction leading to heart attack. Streptokinase is also known as Tissue Plasminogen Activator (TPA). |
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| 890. |
List the most common microorganisms which are termed lactic acid bacteria (LAB). Write their three functions. |
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Answer» Lactobacilllus bulgaricus and Streptococcus thermophillus. Functions: (i) These convert milk into curd (ii) Besides the conversion of milk into lactic acid, the LAB also improve its nutritional quality by increasing vitamin `B_(12)`. (iii) LAB are present in our stomach where they check disease causing microbes. |
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| 891. |
Which of the following is not the belief of an organic farmer?A. The more variety a landscape has, the more sustainable it isB. The insects that are sometimes called pests are not eradicated, but instead are kept at manageable levels by a complex system of checks and balances within a living and vibrant ecosystemC. For controlling plant diseases and pests, chemicals lilke insecticides and pesticides should be used extensivelyD. Eradication of the pests is undersirable because they act as food or hosts for beneficial predatory and parasitic insects |
| Answer» Correct Answer - 3 | |
| 892. |
Agent orange isA. A biodegradable insecticideB. A weedicide containing dioxinC. Colour used in fluorescent lampD. A hazardous chemical used in luminous paints |
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Answer» Correct Answer - B Agent orange is a weedicide containind dioxin It is so , called because of distinctive orange stripe on its packaging , combines equal parts of 2,4-D and 2,4,5-T was later on found to contain a highly poisonous chemical dioxin as impurity. |
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| 893. |
Which of the microrganisms is used for production of citric acid in industries ?A. Lactobacillus bulgarisB. Penicillium citrinumC. Aspergillus nigerD. Rhizopus nigricans |
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Answer» Correct Answer - C Aspergillus niger is the microoganism used for production of citric acid in industries . Citric acid has an extraordinary range of uses. It gives tartness and flovour to the foods. It is an antioxidant and pH adjuster in many foods and dairy products , it often serves as an emulsifier. |
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| 894. |
Methanogens growing anaerobically on cellulosic material produceA. MethaneB. Methane and hydrogenC. Methane and carbon dioxideD. Methane, carbon dioxide and hydrogen |
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Answer» Correct Answer - D Methanogens (Methanobacterium) growing anaerobically on cellulosic material and produce methane, carbon dioxide and hydrogen. |
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| 895. |
Assertion : Curd is more nutritious than milk . Reason : LAB present in curd checks the growth of disease- causing microbes.A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).C. If Assertion is true statement but Reaosn is false, then mark (3).D. If both Assertion and Reason are false statements, then mark (4). |
| Answer» Correct Answer - 2 | |
| 896. |
Assertion : Curd is more nutritious than milk . Reason : LAB present in curd checks the growth of disease- causing microbes.A. If both Assertion and Reason are true and the reason is the correct explanation of the assertion , then mark (1) .B. If both Assertion and Reason are true but the reason is not the correct explanation of the assertion , then mark (2).C. If assertion is true but Reason is false , then false , then mark(3).D. If both assertion is true Reason are false , then Mark (4). |
| Answer» Correct Answer - B | |
| 897. |
Microbes produce different types of gaseous end products during growth and metabolism.A. MicrobesB. Organic substractesutilised by microbesC. End productD. Both A and C |
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Answer» Correct Answer - D Microbes produce different types of gaseous end products during growth and metabolism. The type of the gas producd depends upon the microbes and organic substrates utilised by microbes. |
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| 898. |
Match the following list of bacteria and their commercially important products A. `A-ii," " B-iii, " "C-iv, " " , D-i`B. `A-ii, " " B-iv, " " C-iii, " " D-i`C. `A-iv " " B-iii, " " C-ii, " " D-i`D. `A-iv, " " B-I, " " C-iii, " " D-ii` |
| Answer» Correct Answer - C | |
| 899. |
Give examples to prove that microbes release gases during metabolism. |
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Answer» The examples of bacteria that release gases during metabolism are: Bacteria and fungi carry out the process of fermentation and during this process, they release carbon dioxide. Fermentation is the process of converting a complex organic substance into a simpler substance with the action of bacteria or yeast. Fermentation of sugar produces alcohol with the release of carbon dioxide and very little energy. `"Glucose overset "("without ")/("oxygen")"alcohol " + " energy " + CO_2 ` The dough used for making idli and dosa gives a puffed appearance. This is because of the action of bacteria which releases carbon dioxide. This `CO_2` released from the dough gets trapped in the dough, thereby giving it a puffed appearance. |
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| 900. |
Match the following list of bioactive substance and their roles `{:(,"Bioactive",,"Role"),(A.,"Statin",i.,"Removal of oil stains"),(B.,"Cyclosporin A",ii.,"Removal of clots from blood vessels"),(C.,"Streptokinase",iii.,"Lowering of blood chloesteroal"),(D.,"Lipase",iv.,"Immuno-suppressive agent"):}` Choose the correct matchA. `A-ii," " B-iii, " "C-i, " " , D-iv`B. `A-iv, " " B-ii, " " C-I, " " D-iii`C. `A0iv, " " B-I, " C-ii, " " D-iii`D. `A-iii, " " B-iv, " " C-ii, " " D-i` |
| Answer» Correct Answer - D | |