Details of Microbes in Human Welfare Biology Quiz for NEET
| No. of Questions in Quiz | 29 with Explanation |
| Time for each Questions | 60 Seconds |
| Attempts Allowed | Unlimited |
| Available | Always |
| Pass Percentage | 70 % |
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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.
Q no 20 ka galat hai answer 3 hona chahiye
Sorry wo galti se select ho gaya tha we updated
In Ques no.20, 2nd option is more appropriate.plz check once.
Ok we checked and update thanks for your feedback
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