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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.
| 301. |
Some blue green algae are used as biofertilizers because theyA. fix nitrogenB. are mucilaginousC. can grow everywhereD. are deficint in nutrient |
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Answer» Correct Answer - A Biofertilisers are organisms, which bring about nutrient availability to crop plants by fixing the nitrogen. The main sources of biofertilisers are nitrogen-fixing bacteria, nitrogen-dixing cyanobacteria and mycorrhizal fungi, e.g. Azotobacter, Azolla, Clostridum etc. |
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| 302. |
Milk is converted into curd by :A. Xanthomonas citriB. Bacillus megatheriumC. Acetobacter acetiD. None of these |
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Answer» Correct Answer - D The jpreparation of curd from milk is catalysed by thermophlius at temperature about `40^@C`. Lactobacillus converts lactose to lactic acid whiereas Streptococcus causes coagulation of casein due to acidity. |
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| 303. |
Milk is converted into curd by :A. Bacillus megatheriumB. Xanthomonas citriC. Acetobacter acetiD. None of these |
| Answer» Correct Answer - D | |
| 304. |
Which of the following is correctly matched for the product produced by themA. Methanobacterium: Lactic acidB. Penicillium:Acetic acidC. Saccharomyces cerevisiae: EthanolD. Acetobacter aceti: Antibiotics |
| Answer» Correct Answer - C | |
| 305. |
Which of the following is correctly matched for the product produced by themA. Acetobacter aceti : AntibioticsB. Methanobacterium : Lactic acidC. Penicillium notatum : Acetic acidD. Sacchromyces cerevisiae : Ethanol |
| Answer» Correct Answer - 4 | |
| 306. |
Which of the following is correctly matched for the product produced by themA. Acetobacter aceti - antibioticB. Methanobacterium - lactic acidC. Penicillium notatum - acetic acidD. Saccharomyces cerevisiae - Ethanol |
| Answer» Correct Answer - D | |
| 307. |
Select the mismatchA. Frankia- AlnusB. Rhodospirillum - MycorrhizaC. Anabaena - Nitrogen fixerD. Rhizobium-Alfalfa |
| Answer» Correct Answer - B | |
| 308. |
Heating of milk of ant other liquid at `63^(@)` C and sudden cooling is known as :A. PreservationB. SterilizationC. FermentationD. Pasteurization |
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Answer» Correct Answer - D Pasteurization involves the heating of milk at `63^(@)C (142^(@) -145^(@) F)` for 30 minutes or `72^(@)(160^(@)F)` for 20second and then suddenly cooling it. |
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| 309. |
Tissue plasminogen activator isA. A vitaminB. An electric deviceC. An enzymeD. A chemical that stimulates tissue differentiation |
| Answer» Correct Answer - C | |
| 310. |
Enzyme tissue plasminogen activator (TPA) is used for:A. Dissolving blood clotsB. Clearing turbidity of juicesC. Maintaining turgor pressureD. Stimulating thromboplastin production |
| Answer» Correct Answer - A | |
| 311. |
Therioside is a protenaceous toxin, which is obtained fromA. plantsB. bacteriaC. green manureD. farmyard manure |
| Answer» Correct Answer - B | |
| 312. |
Which of the following is a free-living nitrogen-fixing biofertiliser ?A. RhizobiumB. MicrophlkosC. PyrethrinD. Aztobacter |
| Answer» Correct Answer - D | |
| 313. |
Source of riboflavin isA. Ashbya yeastB. TorulopsisC. Saccharomyces yeastD. all yeasts |
| Answer» Correct Answer - A | |
| 314. |
Riboflavin isA. Vitamin `B_(12)`B. Vitamin `B_(6)`C. Vitamin `B_(2)`D. Vitamin `B_(9)` |
| Answer» Correct Answer - 3 | |
| 315. |
Yeast grows abundantly onA. cow dung and cow urineB. organic matter rish in sugarC. organic matter rich in fatsD. necter |
| Answer» Correct Answer - B | |
| 316. |
Acetobacter acid ferementation is brought about by :A. NitrobacterB. RhizopusC. AcetobacterD. Aspergillus |
| Answer» Correct Answer - C | |
| 317. |
Name an immune immunosupressive agent? |
| Answer» Cyclosporin-A produced by the fungus Trichoderma polysporum is used as an immunosupressive agent in organ transplant patients. | |
| 318. |
The first organic acid to be produced industrially by fermentation was :A. Citric acidB. Lactic acidC. Acetic acidD. Aspergillus |
| Answer» Correct Answer - B | |
| 319. |
The first organic acid to be produced industrially by fermentation was :A. Acetic acidB. Citric acidC. Gluconic acidD. Lactic acid |
| Answer» Correct Answer - 4 | |
| 320. |
Devine and Collego are two trade names forA. bioinsecticidesB. biofungicidesC. bioherbicidesD. rodenticides |
| Answer» Correct Answer - 3 | |
| 321. |
Biofertizers includeA. Blue green alagae ,Rhizobium , other nitrogen - fixing bacteria , and mycorrhizaB. blue green alage , trichoderma , rhizobium , and other nitrrogen - fixing bacteriaC. Rhizbium , other nitrogen -fixing bacteria ,NPv, and mycorrhizaD. Blue green alage Rhizbium ,Bt cotton , and mycorrhiza |
| Answer» Correct Answer - A | |
| 322. |
Devine and collego are two agricultural substances that are used asA. BiofertilizersB. Natural insecticdesC. Insect hormonesD. Bioherbicides |
| Answer» Correct Answer - D | |
| 323. |
which of the following statements is incorrect with respect to pectinases ?A. they are used in clearing of fruit juicesB. they are used in chill-profing beer and whiskyC. they are obtained from Byssoclamys fulvaD. they are used in retting of fibers |
| Answer» Correct Answer - B | |
| 324. |
Methanogenic bacteria are not found inA. Bottom of water - logged paddy fieldsB. Activated sludgeC. Gobar gas plantD. Rumen of cattle |
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Answer» Correct Answer - B Methanogenic bacteria are not found in the activated sludge. |
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| 325. |
Bottled juices are clarified by the use ofA. PectinasesB. PeptidasesC. LipasesD. Both A and B |
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Answer» Correct Answer - A Bottled juices are clarified by the use of pectinases. |
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| 326. |
Type of the alcholic drinks are depend on theA. Type of raw material usedB. Type of processingC. Type of fermentorsD. Type of weather |
| Answer» Correct Answer - D | |
| 327. |
which of the following organism is useful in the preparation of requefort cheeseA. MucorB. PhizopusC. AspergillusD. Penicillium |
| Answer» Correct Answer - D | |
| 328. |
The application of microbial metabolism to trensform simple raw materials into valuabale products isA. BioctalysisB. Genetic enegineeringC. Tissue cultureD. Fermentation |
| Answer» Correct Answer - D | |
| 329. |
A : Statins are product of fermentation activity of yeast. R : Statins and mevalonate compete for same active site on enzyme involved in cholesterol synthesis.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 | |
| 330. |
Assertion : Enzymes application provides protection to enzymes without affecting their activity. Reason : Immobilization provides protection to enzymes without affecting their activity.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explananation of the assertionC. If the assertion is true but the reasons is falseD. If both the assertion and reason are false |
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Answer» Correct Answer - A An immmoblized enzyme is physically entrapped or covalently bonded by chemical means to an inert and usally isolube matrix, where it can act upon its natural sunstrate. The matrix, is usually a high molecular weight, polymer such as polyacrylamide, cellulose, strach ,galss, beads, etc. Because of its binding wih a matrix, the immobilizzed enzyme has better stability in many cases. Efficiency of immobilized enzyme is better. The enzyme can be recovered at the end of the reaction and can be used repeatedly. |
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| 331. |
Peniciliin is obtained fromA. Aspergillus fumigatusB. Penicililium chrysogenumC. Penicllium griseofulveumD. Stretomyces griseus |
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Answer» Correct Answer - B Pecnicillin is obtained from Pencillium notatum and Penicillium chrysogenum. (Sir Alexander flemming 1928). |
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| 332. |
Yeast is used in the formation of :A. curdB. petrolC. alcoholD. ammonia |
| Answer» Correct Answer - C | |
| 333. |
Saccharomyces is commonly used in the production ofnA. Ethuyl alcoholB. CurdC. Acetic acidD. |
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Answer» Correct Answer - A Alcohol fermentation is carried out by a number of bacteria and yeast (Saccharomyces. ) The ethanol and carbon dioxide produced by Saccharomyces are useless for yeast but useful to humans. Acetic acid is sythesized by the help of Acetobacter (bacteria. ) Citirc acid- is produced by the help of fungus Aspergillus. |
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| 334. |
Which of the folliowing statements is not trur for stirred tank fermentationA. Buffer needed to control pHB. Batch and feed possibleC. Controlled dissovled oxygenD. Easy in process sampling |
| Answer» Correct Answer - C | |
| 335. |
When yeast ferments glucose, the products are:A. water`+CO_(2)`B. Ethanol `+H_(2)O`C. Ethanol `+CO_(2)`D. Methanol `+CO_(2)` |
| Answer» Correct Answer - C | |
| 336. |
Streptocossu is emeplyed in the manufactring ofA. WineB. BreadC. CheeseD. All of these |
| Answer» Correct Answer - C | |
| 337. |
Leavened bread is produced with the help of :A. yeastB. RhizopusC. NeurosporaD. Lactobacillus |
| Answer» Correct Answer - A | |
| 338. |
What would happen if oxygen availability to activated sludge flocs is reduced ?A. It will slow down the rate of degradation of organic matterB. The center of flocs will becoms anoxic, which would cause death of bacteria and eventually breakage of flocsC. Flocs would increase in size as anerobic bacteria would grow around flocsD. Protozoa would grow in large numbers |
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Answer» Correct Answer - A::B Flocs are masses of bacteria associated with fungal filaments to form mesh-like structures. If oxygen availability to activated sludge flocs is reduced, their rate of decomposition of organic matter will decrease. And as the centre of flocs will become anoxic, the bacterial cells will die, thus causing breakage of flocs. |
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| 339. |
Mycorrhiza does not help the host plant inA. enhancing its phosphorus uptake capcityB. increasing its tolerance to droughtC. enhancing its resistance to root pathogensD. increasing its resistance to insects |
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Answer» Correct Answer - D Fungi are also known to form symbiotic associations with plants (mycorrhiza). Many members of the genus Glomus form mycorrhiza. The fungal symbionts in these assocaitions absorb phosphorus from soil and pass it to the plant. Plants having such association show other benefits also, such as resistance to root-borne pathogens, tolerance to salinity and drought, and an overall increase in plant growth and development. |
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| 340. |
Big holes in Swiss cheese are made by aA. a machineB. a bacterium that produces methane gasC. a bacterium producing a large amount of carbon dioxide.D. a fungus that releases a lot of gases during its metabolic activities. |
| Answer» Correct Answer - C | |
| 341. |
Big holes in Swiss cheese are made by aA. a machineB. a bacterium that produces methane gasC. a bacterium producing a large amount of carbon dioxideD. a fungus that releases a lot of gases during its metabolic activities |
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Answer» Correct Answer - C Ripened cheese is prepared from unripened cheese by first dipping in brine, wiping and then maturation with different strain of bacteria and fungi. It takes 1-16 months for ripening. Large holed Swiss cheese is ripened with the help of `CO_(2)` producin (causing holes) bacterium called Propionibacterium sharmanii. |
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| 342. |
The residue left after methane production from cattle dung isA. burntB. burried in land fillsC. used as manureD. used in civil construction |
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Answer» Correct Answer - C Biogas is a methane rich fuel gas produced by anaerobic breakdown or digestion of biomass with the help of methanogenic bacteria. Biogas is made up of methane `(50 - 70%)`, carbon dioxide `(30-40%)` with traces fo nitrogen, hydrogen sulphide and hydrogen. the effluent and residue left after the fermentative generation of biogas is rich in minerals, lignin and a part of cellulose. it is an ideal manure. |
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| 343. |
The residue left after methane production from cattle dung isA. burntB. buried in land fillsC. used an manureD. used in civil construction |
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Answer» Correct Answer - C The raw material for biogas production is excreta (dung) of cattle. The biogas planr consists of a concrete tank (10-15 feet deep) in which bio-wastes are collected and a slurry of dung is fed. A floating cover is placed over the slurry, which keeps on rising as the gas is produced in the tank dur to the microbial activity. Methanobacterium in the dung act on the bio-wastes to produce bio-gas. the gas produced in supplied to nearly houses by an oulet. Through another outlet, the spent slurry is removed to be used as manure. |
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| 344. |
Mathanogens do not produceA. oxygenB. methaneC. carbon dioxideD. hydrogen sulphide |
| Answer» Correct Answer - A | |
| 345. |
Mathanogens do not produceA. oxygenB. methaneC. hydrogen sulphideD. carbon dioxide |
| Answer» Correct Answer - A | |
| 346. |
What is BOD? What does it mean if a water sample has more BOD? |
| Answer» Biochemical oxygen demand (BOD) represents the amount of dissolved oxygen that would be consumed if all the organic matter in one litre of water were oxidized by microorganisms. More value of BOD means the water sample is polluted with organic matter. | |
| 347. |
What is the function of aeration tank in the treatment of sewage? |
| Answer» Aeration tank is meant for agitating the liquid effluent from the primary settiling tank where the air is aloowed to pass through agitating mixture to make it aerobic. | |
| 348. |
Which one as used/regarded as biofertilliser?A. A association between pteridophytes and cyanobacteria AnabaenaB. A association between gymnosperms and NostocC. A association between legume and RhizobiumD. All of the above. |
| Answer» Correct Answer - D | |
| 349. |
Name the water ferm that is an excellent biofertilliser for rice cultigvation. What helps the fern to do so? |
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Answer» An attractive cyanobacterial biofertiliser is Azolla-Anabaena symbiosis which is an excellent biofertiliser for rice cultivation. The atmospheric nitrogen is fixed by cyanobacteria-Anabuena azollae. |
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| 350. |
Give the scientific name of the source organism from which the first antibiotic was produced. |
| Answer» Correct Answer - Penicillium notanum. | |