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Microbes in Human Welfare

NEET (UG) 2025MCQMedium📈 Topic in 12% papers+4−1
Ques. 1NEET (UG) 2025

Which of the following organisms cannot fix nitrogen? Choose the correct answer from the options given below:

  1. B only
  2. E only
  3. A only
  4. D only

Answer

(4) D only

Solution

A: Azotobacter is a free-living soil bacterium that fixes atmospheric nitrogen.

B, C, E: Oscillatoria, Anabaena and Nostoc are cyanobacteria that fix atmospheric nitrogen and are used as biofertilisers.

D: Volvox is a colonial green alga (Chlorophyceae); it cannot fix nitrogen.

Answer: (4)

Keep practising — Microbes in Human Welfare

Ques. 2NEET (UG) 2025

Streptokinase produced by bacterium Streptococcus is used for

  1. Liver disease treatment
  2. Removing clots from blood vessels
  3. Curd production
  4. Ethanol production
Ques. 3NEET (UG) 2025

Which of the following microbes is NOT involved in the preparation of household products? Choose the correct answer from the options given below:

  1. C and D only
  2. C and E only
  3. A and B only
  4. A and C only
Ques. 4NEET (UG) 2024

Match List I with List II Choose the correct answer from the options given below:

  1. A-III, B-I, C-II, D-IV
  2. A-II, B-IV, C-III, D-I
  3. A-III, B-I, C-IV, D-II
  4. A-IV, B-I, C-III, D-II
Ques. 5RE-NEET (UG) 2024

Match List-I with List-II relating to microbes and their products: Choose the correct answer from the options given below:

  1. A-II, B-III, C-IV, D-I
  2. A-I, B-II, C-III, D-IV
  3. A-I, B-III, C-II, D-IV
  4. A-I, B-IV, C-II, D-III
Ques. 6NEET (UG) 2022

Identify the microorganism which is responsible for the production of an immunosuppressive molecule cyclosporin A :

  1. Trichoderma polysporum
  2. Clostridium butylicum
  3. Aspergillus niger
  4. Streptococcus cerevisiae
Ques. 7NEET (UG) 2021

Match List-I with List-II 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)
Ques. 8NEET (UG) 2020

Which of the following is put into Anaerobic sludge digester for further sewage treatment?

  1. Effluents of primary treatment
  2. Primary sludge
  3. Floating debris
  4. Activated sludge
Ques. 9NEET (UG) 2020

Match the following columns and select the correct option.

  1. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
  2. (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
  3. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
  4. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
Ques. 10NEET (UG) 2019

Select the correct group of biocontrol agents.

  1. Oscillatoria, Rhizobium, Trichoderma
  2. Nostoc, Azospirillum, Nucleopolyhedrovirus
  3. Bacillus thuringiensis, Tobacco mosaic virus, Aphids
  4. Trichoderma, Baculovirus, Bacillus thuringiensis
Ques. 11NEET (UG) 2019

Match the following organisms with the products they produce : Select the correct option.

  1. (a)-(iii), (b)-(iv), (c)-(v), (d)-(i)
  2. (a)-(ii), (b)-(i), (c)-(iii), (d)-(v)
  3. (a)-(ii), (b)-(iv), (c)-(v), (d)-(iii)
  4. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(v)

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