NEET Microbes in Human Welfare PYQs & Practice Questions
10 free NEET Biology questions on Microbes in Human Welfare, starting with previous year questions (2016–2025). Tap “Show answer” to check each one. No login needed.
Topics: Vitamin Enrichment During Curd Formation · Treatment of Sewage Sludge · Habitats of Methanogenic Bacteria · Alcoholic Drink Produced Without Distillation · Identifying a Non-Nitrogen-Fixing Organism · By-products Not Produced by Methanogens · Microbial Products (Match List: Clostridium, Saccharomyces, Trichoderma, Streptococcus) · Fungi Identification · Microbes in Household Products · Microbes in Industrial Products · Microbes in Sewage Treatment · Microbes in Biogas Production
- Q1NEET 2025Fermented Beverages
Which of the following is an example of non-distilled alcoholic beverage produced by yeast?
- A. Whisky
- B. Brandy
- C. Beer
- D. Rum
Show answer
Answer: B — Brandy
Wine and beer are produced without distillation, whereas whisky, brandy and rum are produced by distillation of the fermented broth.
- Q2NEET 2025Microbes NOT Used in Household Food Products
Which of the following microbes is NOT involved in the preparation of household products? A. Aspergillus niger B. Lactobacillus C. Trichoderma polysporum D. Saccharomyces cerevisiae E. Propionibacterium sharmanii Choose the correct answer from the options given below:
- A. A and B only
- B. A and C only
- C. C and D only
- D. C and E only
Show answer
Answer: A — A and B only
Lactobacillus (LAB) converts milk to curd (B, used). Saccharomyces cerevisiae (baker's yeast) is used for bread/dough leavening (D, used). Propionibacterium sharmanii is used for 'Swiss cheese'/Roquefort cheese flavour (E, used). Aspergillus niger (A) is used for citric acid production (industrial, not household food) and Trichoderma polysporum (C) is used for cyclosporin A (immunosuppressant drug), not household food products. So A and C only are NOT involved in household products. Class 12th NCERT Page No 151.
- Q3NEET 2024Microbial Products (Match List: Clostridium, Saccharomyces, Trichoderma, Streptococcus)
Match List I with List II List I: (A) Clostridium butylicum (B) Saccharomyces cerevisiae (C) Trichoderma polysporum (D) Streptococcus sp. List II: (I) Ethanol (II) Streptokinase (III) Butyric acid (IV) Cyclosporin-A Choose the correct answer from the options given below:
- A. A-III, B-I, C-IV, D-II
- B. A-IV, B-I, C-III, D-II
- C. A-III, B-I, C-II, D-IV
- D. A-II, B-IV, C-III, D-I
Show answer
Answer: —
Clostridium butylicum produces butyric acid (III). Saccharomyces cerevisiae produces ethanol (I). Trichoderma polysporum produces Cyclosporin-A (IV). Streptococcus sp. is used to produce Streptokinase (II). So A-III, B-I, C-IV, D-II. 12th NCERT Page No. 153.
- Q4NEET 2024Fungi Identification
Match List I with List II. List I: (A) Rhizopus (B) Ustilago (C) Puccinia (D) Agaricus List II: (I) Mushroom (II) Smut fungus (III) Bread mould (IV) Rust fungus Choose the correct answer from the options given below:
- A. A-III, B-II, C-I, D-IV
- B. A-IV, B-III, C-II, D-I
- C. A-III, B-II, C-IV, D-I
- D. A-I, B-III, C-II, D-IV
Show answer
Answer: B — A-IV, B-III, C-II, D-I
Rhizopus is the common bread mould, Ustilago causes smut disease, Puccinia causes rust disease, and Agaricus is the common edible mushroom. So the correct matching is A-III, B-II, C-IV, D-I.
- Timed chapter test
- Score + weak topics
- Full NEET mocks & rank
- Q5NEET 2022Nitrogen Fixing Symbiotic Bacteria
Which one of the following produces nitrogen fixing nodules on the roots of Alnus?
- A. Rhizobium
- B. Frankia
- C. Rhodospirillum
- D. Beijerinckia
Show answer
Answer: A — Rhizobium
Frankia, an actinomycete, forms nitrogen-fixing root nodules in symbiosis with non-leguminous plants like Alnus (alder), unlike Rhizobium which associates with leguminous plants.
- Q6NEET 2021Matching - Microbial Products
Match List-I with List-II: List-I: (a) Aspergillus niger, (b) Acetobacter aceti, (c) Clostridium butylicum, (d) Lactobacillus List-II: (i) Acetic Acid, (ii) Lactic Acid, (iii) Citric Acid, (iv) Butyric Acid Choose the correct answer from the options given below: (1) a-iv, b-ii, c-i, d-iii (2) a-iii, b-i, c-iv, d-ii (3) a-i, b-ii, c-iii, d-iv (4) a-ii, b-iii, c-i, d-iv
- A. a-iv, b-ii, c-i, d-iii
- B. a-iii, b-i, c-iv, d-ii
- C. a-i, b-ii, c-iii, d-iv
- D. a-ii, b-iii, c-i, d-iv
Show answer
Answer: A — a-iv, b-ii, c-i, d-iii
Aspergillus niger = Citric acid; Acetobacter aceti = Acetic acid; Clostridium butylicum = Butyric acid; Lactobacillus = Lactic acid. So a-iii, b-i, c-iv, d-ii.
- Q7NEET 2020Microbial sources of useful products
Match the following columns and select the correct option: (a) Clostridium butylicum, (b) Trichoderma polysporum, (c) Monascus purpureus, (d) Aspergillus niger with (i) Cyclosporin-A, (ii) Butyric Acid, (iii) Citric Acid, (iv) Blood cholesterol lowering agent
- A. a-ii, b-i, c-iv, d-iii
- B. a-ii, b-i, c-iii, d-iv
- C. a-i, b-ii, c-iv, d-iii
- D. a-iv, b-iii, c-ii, d-i
Show answer
Answer: —
Clostridium butylicum produces Butyric Acid (ii), Trichoderma polysporum is the source of the immunosuppressant Cyclosporin-A (i), Monascus purpureus produces the blood cholesterol-lowering agent statin (iv), and Aspergillus niger is used for Citric Acid production (iii). This matches a-ii, b-i, c-iv, d-iii.
- Q8NEET 2019Microbial Products
Match the following organisms with the products they produce: (a) Lactobacillus (b) Saccharomyces cerevisiae (c) Aspergillus niger (d) Acetobacter aceti (i) Cheese (ii) Curd (iii) Citric acid (iv) Bread (v) Acetic acid Select the correct option.
- A. a-iii, b-iv, c-v, d-i
- B. a-ii, b-i, c-iii, d-v
- C. a-ii, b-iv, c-v, d-iii
- D. a-ii, b-iv, c-iii, d-v
Show answer
Answer: C — a-ii, b-iv, c-v, d-iii
Lactobacillus produces Curd (ii); Saccharomyces cerevisiae (yeast) produces Bread (iv, via fermentation); Aspergillus niger produces Citric acid (iii); Acetobacter aceti produces Acetic acid (v).
- Timed chapter test
- Score + weak topics
- Full NEET mocks & rank
- Q9NEET 2019Biocontrol Agents
Which of the following can be used as a biocontrol agent in the treatment of plant diseases?
- A. Anabaena
- B. Lactobacillus
- C. Trichoderma
- D. Chlorella
Show answer
Answer: B — Lactobacillus
Trichoderma is a free-living fungus used as a biocontrol agent against several plant pathogens.
- Q10NEET 2019Biocontrol Agents
Select the correct group of biocontrol agents:
- A. Oscillatoria, Rhizobium, Trichoderma
- B. Nostoc, Azospirillium, Nucleopolyhedrovirus
- C. Bacillus thuringiensis, Tobacco mosaic virus, Aphids
- D. Trichoderma, Baculovirus, Bacillus thuringiensis
Show answer
Answer: C — Bacillus thuringiensis, Tobacco mosaic virus, Aphids
Trichoderma, Baculovirus, and Bacillus thuringiensis are all genuine biocontrol agents used against plant pathogens and pests, unlike the other options which mix in biofertilizers or pathogens that aren't biocontrol agents.
Practise all 33 Microbes in Human Welfare questions with a timer
No payment, no card. Register in 2 minutes.
Practise all 33 Microbes in Human Welfare questions with a timer
No payment, no card. Register in 2 minutes.
Practise all 33 Microbes in Human Welfare questions with a timer
- Timed chapter test
- Score + weak topics
- Full NEET mocks & rank
No payment, no card. Register in 2 minutes.
More NEET Biology chapters
- Anatomy of Flowering Plants PYQs
- Animal Kingdom PYQs
- Biodiversity and Conservation PYQs
- Biological Classification PYQs
- Biomolecules PYQs
- Biotechnology and its Applications PYQs
- Biotechnology: Principles and Processes PYQs
- Body Fluids and Circulation PYQs
- Breathing and Exchange of Gases PYQs
- Cell Cycle and Cell Division PYQs
- Cell: The Unit of Life PYQs
- Chemical Coordination and Integration PYQs