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.
| 101. |
Which is false about antibiotics ?A. Coined by Waksman (1942)B. Produced by microorganismsC. Produce allergy in some personsD. Cure all diseases |
| Answer» Correct Answer - D | |
| 102. |
Nitrogen fixation isA. Nitrogen `rarr` AmmoniaB. Nitorgen `rarr` NitratesC. Nitrogen `rarr` Amino acidsD. Both A and B |
| Answer» Correct Answer - D | |
| 103. |
Pasteurisation is carried out atA. `120^(@)C` for 60 minutesB. `60^(@)-63^(@)C` for thirty minutesC. `70^(@)C` for 60 minutesD. `80^(@)C` for 30 minutes |
| Answer» Correct Answer - B | |
| 104. |
Pasteurisation isA. Heating of liquid at `65^(@)C`B. Heating of liquid between `65^(@)-80^(@)C` followed by rapid coolingC. Heating of solids at `65^(@)C`D. None of these |
| Answer» Correct Answer - B | |
| 105. |
Human society started use of bronze/copperA. Earlier than ironB. Later than ironC. Around 2000 B.C.D. Both B and C |
| Answer» Correct Answer - A | |
| 106. |
Yeast is used in the production ofA. Cheese and butterB. bread and beerC. citric acid and lactic acidD. lipase and pectinase |
| Answer» Correct Answer - B | |
| 107. |
Assertion a : Azolla is used as biofertilzer in rice fields Reason r: Azolla contains nitrogen fixing cyanobacteria in its root nodulesA. Both a and r true, but r is not correct explanation of aB. a is true but r is falseC. a is false but r is trueD. Both a and r are true and r is correct explanation of a |
| Answer» Correct Answer - B | |
| 108. |
Azolla pinnata is allowed to grow in rice fields becauseA. It does not disturb photosynthesis of Rice plantsB. It provides food to fishC. It provides aeration to standing waterD. It contains Anabaena |
| Answer» Correct Answer - 4 | |
| 109. |
Which one of the following is useful in Rice fieldsA. RhizobiumB. ClostridiumC. AnabaenaD. Ferrobacterium |
| Answer» Correct Answer - C | |
| 110. |
maximum nutritional diversity is found in the rice fields isA. FrankiaB. TolypothrixC. FungiD. Animalia |
| Answer» Correct Answer - A | |
| 111. |
Yeast is used in the production of:-A. Bread and beerB. Cheese and butterC. Citric acid and lactic acidD. Lpase and pectinase |
| Answer» Correct Answer - A | |
| 112. |
A nitrogen fixing microbe associated with Azolla in rice-fields is:-A. FrankiaB. TolypothrixC. SpirulineD. Anabaene |
| Answer» Correct Answer - D | |
| 113. |
A nitrogen fixing microbe associated with the fern Azolla in rice fields isA. SpirulinaB. AnabaenaC. FrankiaD. Tolypothrix |
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Answer» Correct Answer - B Anabaena azollae is a free-living nitrogen fixing blue-green alga or cyanobacterium but it may also live symbiotically in the leaf cavities of Azolla, an aquatic , This cyanobacterium has nitrogenase enzyme, therefore can fix nitrogen. If this fern is grown in paddy (rice) fields, a remarkable 50% increase in yield can be noticed. |
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| 114. |
A nitrogen fixing microbe associated with the fern Azolla in rice fields isA. FrankiaB. RhizobiumC. SpirunlinaD. Anabaena |
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Answer» Correct Answer - D Anabaena azollae, a cyanobacterium that lives in symbiotic association with the free folating water ferm Azolla. Anabaena azollae can grow photo-autotrophically and fixed atmospheric nitrogen. The inoculation of cyanobacteria in rice crop significantly influences the growth of rice crop by secretion of ammonia in flood water. |
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| 115. |
A nitrogen fixing microbe associated with Azolla in rice-fields is:-A. FrankiaB. TolypothrixC. SpirulinaD. Anabaena |
| Answer» Correct Answer - 4 | |
| 116. |
Which microorganisms is empolyed in production of dextran ?A. LeuconostocB. TorulopsisC. RhizopusD. Lactobacillus |
| Answer» Correct Answer - A | |
| 117. |
Dextran is used in :A. bleedingB. blood clottingC. blood transfusionD. blood preservation |
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Answer» Correct Answer - C Dextran is used as a substitute for blood plasma in transfusion. |
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| 118. |
Name the insecticides obtained from tobacco.A. RyaniaB. SalaninC. NicotineD. Meliantiol |
| Answer» Correct Answer - C | |
| 119. |
Mostly bread is semi-sweet in taste due toA. YeastB. Remnants of alcoholC. SugarD. Acetic acid |
| Answer» Correct Answer - B | |
| 120. |
Antiboitic flavicin is obtained fromA. Aspergillus flavousB. Aspergillus clavatusC. Streptomyces greiseusD. Streptomyces fradiae |
| Answer» Correct Answer - A | |
| 121. |
Which one of the following insecticides is of plant originA. EcdysoneB. RotenoneC. ParathionD. Malathion |
| Answer» Correct Answer - B | |
| 122. |
The purpose of bioligical treatment of waste water is toA. reduce BODB. increase BODC. reduce sedimentationD. increase sedimentation. |
| Answer» Correct Answer - A | |
| 123. |
Antibiotic flavicin is obtained fromA. Aspergillus fumigatusB. Aspergillus flavusC. Streptomyces gresusD. Streptomyces fradiae |
| Answer» Correct Answer - B | |
| 124. |
The phenomenon of antibiosis (i.e., secre- tion of one microbe) was discovered byA. PasteurB. BabesC. VuileninD. Fleming |
| Answer» Correct Answer - 2 | |
| 125. |
name the blank spaces A, B C,and D from the a table given below: A. A-Trichoderina polyspora, B-Organ transplant patients, C-Yeast (Fungus), D-Lowering of blood cholesterolB. A-Lowering of blood cholesterol, B -Terichoderina polyspora, C-Organ transplant perients, D-Yeast (Fungus)C. A-Yaast (Fungus), B-Lowering of blood cholesterol, C-Trichoderina polyspora, D-Oral transplant patientsD. A-Organic transplant patients, B-Yeast (Fungus), C-Lowering of blood cholesterol, D-Trichoderina polyspora |
| Answer» Correct Answer - A | |
| 126. |
Which one of the following organsims is not used as biocontrol agent ?A. Bacillus sphaericusB. Trichoderma virideC. Bacillus thuringenesisD. Bacillus subtilis |
| Answer» Correct Answer - D | |
| 127. |
A good example of organic fertillizer which improves phosphorus uptake isA. Actinomcetes fungiB. RhizobiumC. AzospirillumD. None of these. |
| Answer» Correct Answer - C | |
| 128. |
Assertion: The greater the BOD of waste water, less is its polluting potential. Reason: The effuent from the primary treatment plant is generally released into natural water bodies like rivers and streams.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 - D The greater the BOD of waste water, more is its poloting potential. `*` The effluent from the secondary treatment plant is generally released into natural water bodies like rivers and strems. |
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| 129. |
Cyclosporin - an immunosuppressive drug - is produced byA. Aspergillus nigerB. Manascus purpureusC. Penicillium notatumD. Trichoderma polysporum |
| Answer» Correct Answer - D | |
| 130. |
Highest number of antibiotics are produced byA. BacillusB. PenicilliumC. StreptomycesD. Cephalosporium |
| Answer» Correct Answer - A | |
| 131. |
Name the block speses A,B,C and D given in the following table A. A-Streptococcus, B-Fungus, C-Cyelosporin-A,D-Clostridium butylicum.B. A-Clostridium buytylicum, B-Streptococcus, C-Fungus, D-Cyclosporin-AC. A-Cycolsporin-A,B-Clostridium butylicum, C-Streptococcus, D-FingusD. A-Fungus, B-Cyclosporin-A,C-Clostridium Butylicum, D-Streptococous |
| Answer» Correct Answer - A | |
| 132. |
Which of the following antibiotics kills bacterial cells by inhibitng the polymerisation of peptidoglycansA. AminoglycosidesB. FluoroquiolonesC. QuinineD. Penicillin |
| Answer» Correct Answer - D | |
| 133. |
The concept of antibiosis was prodounded in 1889 by:A. Louis PasteurB. Paul VuilleminC. Selman WaksmanD. Alexander fleming |
| Answer» Correct Answer - B | |
| 134. |
Assertion: The municipal waste-water is also called sewage. Reason: Amalor component of sewage is human excreta.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 `*` Themunicipal waste-water is also called sewage. `*` Amajor component of sewage is human excrets. |
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| 135. |
Assertion: Indirectly, BOD is measure of organic matter present in the water. Reason: The BOD test measures the rate of uptake of oxygen by micro-organisms in a sample of water.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 The BOD test measures the rate of uptake of oxygen by micro-organisms in a sample of water, thus indirectly, BOD is a measure present in the water. |
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| 136. |
which one of the following is used as biological insecticide ?A. Tiger beetleB. CaterpillarC. Silk mothD. Mazra Poka |
| Answer» Correct Answer - A | |
| 137. |
a sewage treatment in which a part of decomposer bacteria present in the is recycled into the starting of the process is calledA. Cyclic treatmentB. Activated sludge treatmentC. Primary treatmentD. Tertiary treatment |
| Answer» Correct Answer - B | |
| 138. |
which one of following is not true about antibiotics?A. the first antibiotic was discovered by Alexander Fleming .B. the term'antibiotic was coined by Sgt Waksman in 1942.C. Some persons can be allergic to a particular antibiotic .D. Each antibiotic is effictiive only against one particular kind of germ . |
| Answer» Correct Answer - D | |
| 139. |
Assertion: Sewage contains large amounts of organic matter and microbes. Many of which are pathogenic. Reason: Before disposal, sewage is treated in sewage treatment plants `(STP_(s))`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 `*` Sewage contains large amounts of organic matter and microbes. Many of which are pathogenic. Before disposal, sewage is treated in sewage treatment palnts (STPs) to make it less polluting. |
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| 140. |
which one of the following is used as biological insecticide ?A. Tiger beetleB. CaterpillarC. Silk mothD. Majra poka |
| Answer» Correct Answer - A | |
| 141. |
the term' Antibiotic " was coined byA. Alexander flemingB. S. WaksmanC. Louis pasteurD. Edward jenner |
| Answer» Correct Answer - B | |
| 142. |
Biogas production is carried out byA. ThermoacidophilesB. MathanogensC. HalophilesD. Luminants |
| Answer» Correct Answer - B | |
| 143. |
(A) : Sewage cannot be directly discharged into natural water bodies. (R) : It contains large amount of pathogenic microbes.A. If both (A) and (R) are true and (R) is the correct explanation of (A).B. If both (A) and (R) are true but (R) is not the correct explanation of (A).C. If (A) is true but (R) is false.D. If both (A) and (R) are false. |
| Answer» Correct Answer - A | |
| 144. |
Biogas produced by the fermentation of manure , sewage , cattle dung , etc., predominantly comprisesA. Methane,nitrogen ,and hydrogenB. Methane and carbon dioxideC. Methane and carbon monoxideD. Methane and nitric oxide |
| Answer» Correct Answer - B | |
| 145. |
(A) : Biogas plants are usually build in rural areas. Cattle dung is available in large quantities.A. If both (A) and (R) are true and (R) is the correct explanation of (A).B. If both (A) and (R) are true but (R) is not the correct explanation of (A).C. If (A) is true but (R) is false.D. If both (A) and (R) are false. |
| Answer» Correct Answer - A | |
| 146. |
Biogas produced by the fermentation of manure , sewage , cattle dung , etc., predominantly comprisesA. methane, nitrogen and hydrogenB. methane and carbon dioxideC. methane and carbon monoxideD. methane and nitric oxide. |
| Answer» Correct Answer - B | |
| 147. |
Assertion: Soil is polluted through use of weedicides to remove weeds. Reason: Agricultural chemicals (like insecticides and pesticided) are toxic and extremely harmful, to human beings and animals alike, and have been polluting environment (soil,ground water), fruits, vegetables and crop plants.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 `*` Soil is pulluted through use of weedicides to remove weeds. `*` Agricultural chemicals (like insecticides and pesticides are toxic and extremely harmful, to human beings and animals alike, and have been polluting environment (soil, gground water), fruits, vegetables and crop plants. |
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| 148. |
Assertion: Biogas plants are more often built in rural areas Reason: Cattle dung is available in large quantities in rural areas wherecattle ae used for a variety of purposes.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 biogas plants are more often built in rural areas because cattle dung is availabe in large quantities in rural areas where cattle are used for a variety of purposes. |
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| 149. |
Ergot, which is an important source of a drug is obtained fromA. AgaricusB. ClavicepsC. CommiphoraD. Ephedra |
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Answer» Correct Answer - B Claviceps perpurea is a fungus which cause ergotismm is rye (secale cereae ) and other plants. It also yields a hallucibnogenic drug called. LSD. |
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| 150. |
Bacillus thuringiensis is used to controlA. bacterial pathogensB. fungal pathogensC. nematodesD. insect pests |
| Answer» Correct Answer - D | |