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Zoology - Microbes in Human Welfare

Practise 62 NEET previous year questions on Microbes in Human Welfare, compiled from papers spanning 2002 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty NEET tests.

Microbes in Human Welfare has been asked in 22 of the 39 years of NEET papers analysed (1988–2026), with 65 questions in all. 65% of them were easy, 35% moderate and 0% tough. Most of its questions came from 2019, with 7 questions that year. In the last three years (2024–2026) it had 11 questions across 13 papers, about 0.8 per paper.

The chapter's 9 topics are not weighted equally: Products (29 questions, 45%), Sewage Treatment (15 questions, 23%), and Biocontrol Agents (9 questions, 14%) have been asked the most. Products has also led over the last five years, with 8 questions.

  1. 1Which of the following is an example of non-distilled alcoholic beverage produced by yeast?2025Products
  2. 2Streptokinase produced by bacterium Streptococcus is used for2025products
  3. 3Which of following organisms cannot fix nitrogen? A. Azotobacter B. Oscillatoria C. Anabaena D. Volvox E. Nostoc Choose the correct answer f2025biofertilizers
  4. 4Which of the following microbes is NOT involved in the preparation of household products? A. Aspergillus niger B. Lactobacillus C. Trichoder2025Products
  5. 5Match List I with List II Choose the correct answer from the options given below:2024Products
  6. 6Following are the steps involved in action of toxin in Bt. Cotton A. The inactive toxin converted into active form due to alkaline pH of gut2024 (Re-NEET)Biocontrol Agents
  7. 7Match List-I with List-II relating to microbes and their products: Choose the correct answer from the options given below:2024 (Re-NEET)Products
  8. 8Given below are two statements: Statement I: Antibiotics are chemicals produced by microbes that kill other microbes. Statement II: Antibodi2024 (Re-NEET)Products
  9. 9Identify the microorganism which is responsible for the production of an immunosuppressive molecule cyclosporin A:2022 (Phase 1)Products
  10. 10Match List - I with List - II . List - I List - II (a) Aspergillus niger (i) Acetic acid (b) Acetobacter aceti (ii) Lactic acid (c) Clostrid2021Products
  11. 11Match the following columns and select the correct option. Column-I Column-II (a) Clostridium butylicum (i) Cyclosporin-A (b) Trichoderma po2020 (Phase 1)Products
  12. 12Which of the following is put into Anaerobic sludge digester for further sewage treatment?2020 (Phase 1)Sewage Treatment
  13. 13For the commercial and industrial production of citric acid, which of the following microbes is used?2020 (Phase 2)Products
  14. 14Match the following columns and select the correct option: Column - I column - II (a) Dragonflies (i) Biocontrol agents of several plant pat2020 (Phase 2)Biocontrol Agents
  15. 15Cyclosporin A , used as an immuno-suppression agent, is produced from:2020 (Phase 2)Products
  16. 16This entry in the table is wrongly matched, identify.2019 (All India)Products
  17. 17Match the following organisms with the products they produce: Column - I Column - II ( a ) Clostridium butylicum ( i ) Lactic acid ( b ) Sac2019 (All India)Products
  18. 18Which of the following can be used as a biocontrol agent in treatment of Plant diseases?2019 (All India)Biocontrol Agents
  19. 19Which of the following is a commercial blood cholesterol-lowering agent?2019 (All India)Products
  20. 20Select the correct group of biocontrol agents.2019 (All India)Biocontrol Agents
  21. 21A biocontrol agent to be a part of an integrated pest management should be2019 (Odisha)Biocontrol Agents
  22. 22Among the following pairs of microbes, which pair has both the microbes that can be used as biofertilisers?2019 (Odisha)Biofertilizer
  23. 23Conversion of milk to curd improves its nutritional value by increasing the amount of2018Products
  24. 24Which of the following in sewage treatment removes suspended solids?2017Sewage Treatment
  25. 25Which of the following is correctly matched for the product produced by them?2017Introduction
  26. 26Which of the following is wrongly matched in the given table?2016 (Phase 1)Products
  27. 27The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the:2016 (Phase 1)Production of Biogas
  28. 28A river with an inflow of domestic sewage rich in organic waste may result in:2016 (Phase 1)Sewage Treatment
  29. 29Match Column-I with Column-II and select the correct option using the codes given below : Column I Column II a. Citric acid (i) Trichoderma 2016 (Phase 2)Products
  30. 30Biochemical Oxygen Demand (BOD) may not be a good index for pollution for water bodies receiving effluents from2016 (Phase 2)Sewage Treatment
  31. 31The high value of BOD (Biochemical Oxygen Demand) indicates that:2015 (Phase 1)Sewage Treatment
  32. 32Match the following list of microbes and their importance: Column I Column II A Lactobacillus (i) Production of genetically-engineered clot 2015 (Phase 2)Products
  33. 33What gases are produced in anaerobic sludge digesters?2014Sewage Treatment
  34. 34During sewage treatment, biogases are produced, which include2013 (All India)Sewage Treatment
  35. 35A good producer of citric acid is2013 (All India)Products
  36. 36Microbe used for biocontrol of pest butterfly caterpillars:2013 (Karnataka)Biocontrol Agents
  37. 37In gobar gas, the maximum amount is that of2012 (Mains)Production of Biogas
  38. 38The domestic sewage in large cities2012 (Mains)Sewage Treatment
  39. 39The most abundant prokaryotes helpful to human in making curd from milk and in production of antibiotics are the ones categorized as2012 (Screening)Introduction
  40. 40Measuring Biochemical Oxygen Demand (BOD) is a method used for2012 (Screening)Sewage Treatment
  41. 41Monascus purpureus is a yeast used commercially in the production of2012 (Screening)Products
  42. 42Yeast is used in the production of2012 (Screening)Products
  43. 43Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct?2011 (Mains)Products
  44. 44Which of the following is mainly produced by the activity of anaerobic bacteria on sewage?2011 (Screening)Sewage Treatment
  45. 45Organisms called Methanogens are most abundant in a2011 (Screening)Production of Biogas
  46. 46Continuous addition of sugars in 'fed batch' fermentation is done to2011 (Screening)Sewage Treatment
  47. 47Secondary sewage treatment is mainly a2011 (Screening)Sewage Treatment
  48. 48Ethanol is commercially produced through a particular species of2011 (Screening)Products
  49. 49When domestic sewage mixes with river water2010 (Mains)Sewage Treatment
  50. 50Select the correct statement from the following2010 (Screening)Production of Biogas

Frequently Asked Questions

1.How many questions are available for Microbes in Human Welfare?

This chapter includes 62 questions compiled from NEET papers spanning 2002 to 2025.

2.Are these questions only from NEET, or from other exams too?

These are NEET questions specifically for the Microbes in Human Welfare chapter. Questions from other exams like AIIMS or JIPMER are organised separately under their respective exam sections.

3.Is Microbes in Human Welfare an important chapter for NEET Zoology?

Microbes in Human Welfare has appeared in 21 of the 25 years of NEET papers covered here, with 62 questions across 31 papers - about 2 per paper it appears in.

4.What is the difficulty level of Microbes in Human Welfare questions in NEET?

Of the 65 questions analysed for this chapter, 65% are easy, 35% moderate and 0% tough. 2019 had the most, with 7 questions.

5.Which topics in Microbes in Human Welfare should I focus on?

These topics have carried the most weightage in Microbes in Human Welfare:

  • Products - 29 questions (45%)
  • Sewage Treatment - 15 questions (23%)
  • Biocontrol Agents - 9 questions (14%)
6.Is Microbes in Human Welfare's weightage in NEET going up or down?

Across all 31 papers analysed, Microbes in Human Welfare has averaged about 2.0 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.8 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.