328
MCQ Questions
35
Assertion-Reason
79
NEET 2025 Pattern
20
Previous Year Q
NCERT Mapping
Microbes in human welfare is from NCERT Class 12 Biology, Chapter 8, under the unit Biology and Human Welfare. This chapter carries approximately 3% weightage in NEET, based on analysis of the last 10 years of question papers. MedicNEET covers this chapter with 442 questions — every question built from line-by-line NCERT analysis.
Topics in Microbes in human welfare
Microbes in industrial products
Microbes in production of biogas
Microbes in sewage treatment
Microbes in household products
Microbes as biofertilizers
Microbes as biocontrol agents
Sample Questions — Microbes in human welfare
Try 5 free questions below. Get all 442 in the MedicNEET app.
MCQ
Why is milk partially digested during curdling?
✅ Correct Answer: D
LAB secrete acids that coagulate and partially digest casein proteins in milk.
MCQ
In which year did Fleming, Chain, and Florey receive the Nobel Prize?
✅ Correct Answer: C
They were awarded the Nobel Prize in 1945.
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MCQ
Why was the discovery of streptokinase significant in medical therapy?
✅ Correct Answer: C
Streptokinase is used as a clot buster to treat heart attacks.
Assertion-Reason
Assertion (A): Antibiotics can kill or retard the growth of disease-causing microbes.
Reason (R): Antibiotics are chemical substances produced by some microbes.
✅ Correct Answer: A
Both statements are exact NCERT quotes. NCERT defines antibiotics as “chemical substances, which are produced by some microbes” and states they “can kill or retard the growth of other (disease-causing) microbes.” The Reason explains WHAT antibiotics are (their origin) that enables the antimicrobial function described in the Assertion.
NEET 2025 Pattern
Which of the following statements concerning microbial applications and associated initiatives are correct?
S1: The Khadi and Village Industries Commission (KVIC) played a significant role in popularising biogas technology in rural India.
S2: The Indian Agricultural Research Institute (IARI) contributed to the development of biofertilisers by identifying several nitrogen-fixing bacteria like Azospirillum and Azotobacter.
S3: Both biogas production and activated sludge treatment primarily rely on aerobic microbial activity.
S4: The Ministry of Environment and Forests initiated the Ganga and Yamuna Action Plans to prevent pollution of rivers by untreated sewage.
S5: Trichoderma polysporum, a fungus, is utilized for the commercial production of blood-cholesterol lowering agents called statins.
✅ Correct Answer: B
Microbes are extensively used in various applications, including biogas production, sewage treatment, and as biofertilisers, often supported by government initiatives and research institutes.
S1: Correct. KVIC, along with IARI, was instrumental in developing biogas technology in India.
S2: Incorrect. The NCERT states IARI's role in developing biogas technology, but does not explicitly link it to the development of biofertilisers by identifying Azospirillum and Azotobacter within this chapter.
S3: Incorrect. Biogas production is an anaerobic process. While the primary effluent in sewage treatment undergoes aerobic treatment (aeration tanks), the digestion of activated sludge is anaerobic. Thus, the claim that *both* primarily rely on aerobic activity is false.
S4: Correct. The Ministry of Environment and Forests initiated these action plans to address river pollution caused by untreated sewage.
S5: Incorrect. Trichoderma polysporum produces Cyclosporin A (an immunosuppressive agent), while statins (blood-cholesterol lowering agents) are produced by the yeast Monascus purpureus.
Therefore, statements S1 and S4 are correct.
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Frequently Asked Questions
How many Microbes in human welfare questions does MedicNEET have?
MedicNEET has 442 questions for Microbes in human welfare, including 328 MCQs, 35 Assertion-Reason questions, and 79 NEET 2025-style long-form questions.
What is the NEET weightage of Microbes in human welfare?
Microbes in human welfare carries approximately 3% weightage in NEET, based on analysis of the last 10 years of papers. It falls under the Biology and Human Welfare unit of Class 12 Biology.
Are Microbes in human welfare questions NCERT-based?
Yes, all MedicNEET Microbes in human welfare questions are built from line-by-line analysis of NCERT Class 12 textbook. Every question maps to specific NCERT pages and concepts.