Microbes in Human Welfare Biology Quiz for NEET

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Details of Microbes in Human Welfare Biology Quiz for NEET
No. of Questions in Quiz29 with Explanation
Time for each Questions60 Seconds
Attempts AllowedUnlimited
AvailableAlways
Pass Percentage70 %

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#1. Which of the following is a commercial blood cholesterol lowering agent?

  • Statin is obtained from a yeast (Fungi) called Monascus purpureus
  • It acts by competitively inhibiting the enzyme responsible for synthesis of cholesterol.

#2. Select the correct group of biocontrol agents.

Fungs Trichoderma, Baculoviruses (NPV) and Bacillus thuringiensis are used as biocontrol agents.

Rhizobium, Nostoc, Azospirillum and Oscillatoria are used as biofertilisers, whereas TMV is a pathogen and aphids are pests that harm crop plants.

#3. Which of the following can be used as a biocontrol agent in the treatment of plant disease?

Fungus Trichoderma is a biological control agent being developed for use in the treatment of plant diseases.

#4. Conversion of milk to curd improves its nutritional value by increasing the amount of

  • Curd is more nourishing than milk.
  • It contains number of vitamins specially Vit-B₁₂.

#5. Which of the following in sewage treatment removes suspended solids?

Primary treatment is a physical process which involves sequential filtration and sedimentation.

#6. Which of the following is correctly matched for the product produced by them?

Saccharomyces cerevisiae is commonly called Brewer’s yeast. It causes fermentation of carbohydrates producing ethanol.

#7. Select the mismatch

Rhodospirillum is anaerobic, free living nitrogen fixer.

Mycorrhiza is a symbiotic relationship between fungi and roots of higher plants.

#8. What gases are produced in anaerobic sludge digesters?

In anaerobic sludge digesters, bacteria produce a mixture of gases like CH₄, H₂S and CO2.

#9. Besides paddy fields, cyanobacteria are also found inside vegetative part of

BGA are also found in coralloid roots of Cycas for nitrogen-fixation e.g. Nostoc & Anabaena.

#10. A good producer of citric acid is

Citric acid – Aspergillus niger.

#11. During sewage treatment, biogases are produced which include :

#12. The domestic sewage in large cities

#13. Monascus purpureus is a yeast used commercially in the production of

#14. In Gobar gas, the maximum amount is that of

#15. Yeast is used in the production of

Yeast – Saccharomyces cerevisiae used in production of bread and beer.

#16. A nitrogen fixing microbe associated with Azolla in rice fields is

Anabaena azollae associated with Azolla (fern).

#17. Measuring Biochemical Oxygen Demand (BOD) is a method used for

Measuring Biochemical Oxygen Demand (BOD) is a method used for estimating the amount of organic matter present in sewage water.

#18. The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibioticsare the ones categorised as

#19. Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct?

Clostridium butylicum – Butyric acid.

#20. Which one of the following is an example of carrying out biological control of pests/diseases using microbes?

A biological control being developed for use in the treatment of plant disease is the fungus Trichoderma. Trichoderma species are free living fungi that are very common in the root ecosystems. They are effective biocontrol agents of several plant pathogens.

We found both options correct

#21. Which one of the following microbes forms symbiotic association with plants and helps them in their nutrition?

#22. Organisms called Methanogens are most abundant in a

#23. Secondary sewage treatment is mainly a

#24. Ethanol is commercially produced through a particular species of

Ethanol is commercially produced through Saccharomyces.

#25. Which one of the following is not a biofertilizer?

Agrobacterium is used in genetic engineerring.

#26. Select the correct statement from the following

Activated sludge sediments in settling tanks of sewage treatment plant is rich source of aerobic bacteria.

#27. An example of endomycorrhiza is

#28. A common biocontrol agent for the control of plant diseases is

#29. Which one of the following is not used in organic farming?

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25 thoughts on “Microbes in Human Welfare Biology Quiz for NEET”

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  1. Quiz is awesome i usually solve it when i take my lunch and dinner..just one request make more question of chapter of short batches like from living world and biological classification

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