NEET Biology Microbes in Human Welfare Miscellaneous Multiple Choice Question And Answers

Biology MCQs with answers for NEET Microbes in Human Welfare Miscellaneous

Question 1. The branch of biology which deals with the study of microbes is called

1. Palynology
2. Zoology
3. Microbiology
4. Botany

Answer: 3. Microbiology

Microbiology is the study of microbes or microorganisms, those being unicellular, multicellular or acellular. It encompasses numerous sub-disciplines including virology, parasitology, mycology and bacteriology.

Question 2. Which of the following microorganism is present in hot springs?

1. Thermoplasma
2. Halobacterium
3. B. Brevis
4. A. Niger

Answer: 1. Thermoplasma

Thermophilic microorganisms found in hot springs, e.g. Bacterium, thermoplastic.

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Question 3. The energy obtained from biological resources is called

1. Electrical energy Rajasthan
2. Mechanical energy
3. Bioenergy
4. Life energy

Answer: 3. Bioenergy

Energy obtained from biological sources is called bioenergy, which is of two types, i.e. Animal energy and biofuels.

Biology MCQs with answers for NEET

Question 4. The botanical name of berseem (Egyptian clover) is

1. Lens esculent
2. Crotalaria juncea
3. Cyamopsis tetragonoloba
4. Trifolium alexandrinum

Answer: 4. Trifolium alexandrinum

The botanical name of berseem is Trifolium alexandrinum which is an annual clover, cultivated mostly in irrigated sub-tropical regions and used as fodder, mainly for cattle and milk buffalo.

Question 5. Fill up the blanks.

1. Bread making – A
2. Commercial production of citric acid – B
3. The traditional drink of South India – C
4. Gives the characteristic feature of Swiss-cheesed

Choose the correct option

1. A–penicillium roqueforti, B–penicillium, C– toddy, d–aspergillus niger
2. A–lactobacillus, B–aspergillus niger, C–Toddy, D–acetobacter acetic
3. A–Saccharomyces cerevisiae, B–aspergillus niger, C–Toddy, D–propionibacterium shermanii
4. A–propionibacterium shermanii, B– bacillus, C–toddy, D–lactobacillus

Answer: 3. A–Saccharomyces cerevisiae, B–aspergillus niger, C–Toddy, D–propionibacterium shermanii

Question 6. …… Are not nitrogen-fixing bacteria.

1. Nostoc, clostridium and azotobacter
2. Anabaena, azotobacter and rhizobium
3. Nitrosomonas, nitrosococcus and nitrobacter
4. Aulosira and bacillus polymyxis

Answer: 3. Nitrosomonas, nitroso-coccus and Nitrobacter

The conversion of ammonia to nitrite and nitrite to nitrate is carried out by certain bacteria in the soil. The chemosynthetic bacteria nitrosomonas, nitrobacter and nitrosococcus carry out denitrification. So, they are not nitrogen-fixing bacteria.

Biology MCQs with answers for NEET

Question 7. Match the following columns.

Answer: 2. A–1, b–3, c–4, d–2

Question 8. Match the following columns.

Answer: 3. A–2, b–1, c–4, d–3

Question 9. Which of the following is wrongly matched in the given table?

Answer: 4. Wrongly matched

Pair and can be corrected as clostridium bretylium is used for the production of butyric acid. Candida lipolytic is the source of lipase. Rest options are correctly matched pairs.

Biology MCQs with answers for NEET

Question 10. Edible fungus is

1. Agaricus bisporus
2. Volvariella volvacea
3. Pleurotus Florida
4. All of the above

Answer: 4. All of the above

All given species are edible fungi. Edible fungus is a nutritious food that can be consumed by human beings and other living organisms and does not cause any side effects. Thus, option

Question 11. The calorific value of biogas is

1. 10-20 MJ/kg
2. 23-28 MJ/kg
3. 30-40 MJ/kg
4. 5-10 MJ/kg

Answer: 3. 30-40 MJ/kg

• Biogas is composed of gases such as CO2 (around 30%), ch4 (around 70%) and trace amounts of n2, o2 and water vapour.
• Its combustible portion is ch 4. Raw biogas has an average calorific value of about 30-35 MJ/kg. After purification, biogas can have a calorific value of 40-45mj/kg

Question 12. Assertion agriculture output increased several times after the introduction of DDT. Reason (R) DDT was the first insecticide used on a wide scale.

1. Both a and r are true and r is the correct explanation of a
2. Both a and r are true, but r is not the correct explanation of a
3. A is true, but r is false
4. Both a and r are false

Answer: 1. Both a and r are true and r is the correct explanation of a

Biology MCQs with answers for NEET

Question 13. In September 2001, which of the following was used as a bioweapon agent in America?

1. Botulinum
2. Anthrax (Bacillus anthracis)
3. Poliovirus
4. Aids virus

Answer: 2. Anthrax (Bacillus anthracis)

Question 14. Select the mismatch.

1. Frankia – Alnus
2. Rhodospirillum – mycorrhiza
3. Anabaena – nitrogen-fixer
4. Rhizobium – alfalfa

Answer: 2. Rhodospirillum – mycorrhiza

Mismatched and can be corrected as rhodospirillum is an anaerobic, free-living bacterium that helps in nitrogen fixation. Whereas mycorrhiza is the symbiotic relationship between fungi and the roots of higher plants. The rest of the options are correctly matched pairs.

Question 15. Which of the following herbicides and defoliants were used by our military in its herbicidal warfare programme during the Vietnam War?

1. Agent black
2. Agent Orange
3. Super orange
4. Both (2) and (3)

Answer: 4. Both (2) and (3)

Agent Orange and Super Orange were used from 1961 to 1971. They released toxins, which caused harm to the health of those exposed during the Vietnam War. Agent blue and white were part of the same programme but did not contain toxins.

Question 16. Match the following columns and choose the correct option from the codes given below.

Answer: 1. A–4, b–3, c–1, d–2

Question 17. Match the following columns.

Answer: 1. A–4, b–3, c–2, d–1