Home NEET Botany MCQs NEET Zoology MCQs NEET Syllabus

Microbes in Human Welfare: Class-XII


Previous Year Questions (PYQs)

MCQ Practice


MCQs on Microbes in Human Welfare: Class-XII for NEET Practice


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

NEET-2022 [Microbes-in-Human-Welfare] [class-xii ]

  • Clostridium butylicum
  • Aspergillus niger
  • Streptococcus cerevisiae
  • Trichoderma polysporum
    • Correct Option: D  [ Trichoderma polysporum ]

    Remark:

Match List-I with List-II.

List-I List-II
(A)Aspergillus niger (I)Acetic Acid
(B)Acetobacter aceti (II)Lactic Acid
(C)Clostridium butylicum (III)Citric Acid
(D)Lactobacillus (IV)Butyric Acid
Choose the correct answer from the options given below:

NEET-2021 [Microbes-in-Human-Welfare] [class-xii ]

  • A-I, B-II-, C-III, D-IV
  • A-II, B-III, C-I, D-IV
  • A-IV, B-II, C-I, D-III
  • A-III, B-I, C-IV, D-II
    • Correct Option: D  [ A-III, B-I, C-IV, D-II ]

    Remark:

Cyclosporin A, used as immuno suppression agent, is produced from:

NEET-(Oct)2020 [Microbes-in-Human-Welfare] [class-xii ]

  • Monascus purpureus
  • Saccharomyces cerevisiae
  • Penicillium notatum
  • Trichoderma polysporum
    • Correct Option: D  [ Trichoderma polysporum ]

    Remark:

Match the following columns and select the correct option:

Column-I Column-II
(A)Dragonflies (I)Biocontrol agents of several plant pathogens
(B)Bacillus thuringiensis (II)Get rid of Aphids and mosquitoes
(C)Glomus (III)Narrow spectrum insecticidal applications
(D)Baculoviruses (IV)Biocontrol agents of lepidopteran plant pests
(V)Absorb phosphorus from soil

NEET-(Oct)2020 [Microbes-in-Human-Welfare] [class-xii ]

  • (A)-(III), (B)-(V), (C)-(IV), (D)-(I)
  • (A)-(II), (B)-(I), (C)-(III), (D)-(IV)
  • (A)-(II), (B)-(III), (C)-(IV), (D)-(V)
  • (A)-(II), (B)-(IV), (C)-(V), (D)-(III)
    • Correct Option: D  [ (A)-(II), (B)-(IV), (C)-(V), (D)-(III) ]

    Remark:

Match the following columns and select the correct option.

Column-I Column-II
(A)Clostridium butylicum (I)Cyclosporin-A
(B)Trichoderma polysporum (II)Butyric Acid
(C)Monascus purpureus (III)Citric Acid
(D)Aspergillus niger (IV)Blood cholesterol lowering agent

NEET-(Sept)2020 [Microbes-in-Human-Welfare] [class-xi ]

  • (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
  • (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
  • (A)-(I), (B)-(II), (C)-(IV), (D)-(III)
  • (A)-(IV), (B)-(II), (C)-(II), (D)-(I)
    • Correct Option: B  [ (A)-(II), (B)-(I), (C)-(IV), (D)-(III) ]

    Remark:

For the commercial and industrial production of Citric Acid, which of the following microbes is used?

NEET-(Oct)2020 [Microbes-in-Human-Welfare] [class-xii ]

  • Aspergillus niger
  • Lactobacillus sp
  • Saccharomyces cerevisiae
  • Clostridium butylicum
    • Correct Option: A  [ Aspergillus niger ]

    Remark:

Match the following organisms with the products they produce:

(A)Lactobacillus (I)Cheese
(B)Saccharomyces cerevisiae (II)Curd
(C)Aspergillus niger (III)Citric Acid
(D)Acetobacter aceti (IV)Bread
(V)Acetic Acid
Select the correct option.

NEET-2019 [Microbes-in-Human-Welfare] [class-xii ]

  • (A)-(II), (B)-(IV), (C)-(V), (D)-(III)
  • (A)-(III), (B)-(IV), (C)-(V), (D)-(I)
  • (A)-(II), (B)-(IV), (C)-(III), (D)-(V)
  • (A)-(II), (B)-(I), (C)-(III), (D)-(V)
    • Correct Option: C  [ (A)-(II), (B)-(IV), (C)-(III), (D)-(V) ]

    Remark:

Which of the following can be used as a biocontrol agent in the treatment of plant disease?

NEET-2019 [Microbes-in-Human-Welfare] [class-xii ]

  • Anabaena
  • Chlorella
  • Trichoderma
  • Lactobacillus
    • Correct Option: C  [ Trichoderma ]

    Remark:

Select the correct group of biocontrol agents.

NEET-2019 [Microbes-in-Human-Welfare] [class-xii ]

  • Bacillus thuringiensis,Tobacco mosaic virus, Aphids
  • Oscillatoria, Rhizobium, Trichoderma
  • Trichoderma, Baculovirus, Bacillus thuringiensis
  • Nostoc, Azospirillium, Nucleopolyhedrovirus
    • Correct Option: C  [ Trichoderma, Baculovirus, Bacillus thuringiensis ]

    Remark:

Match List I with List II:

List-I List-II
A. Clostridium butylicum I. Ethanol
B. Saccharomyces cerevisiae II. Streptokinase
C. Trichoderma polysporum III. Butyric acid
D. Streptococcus sp. IV. Cyclosporin-A
Choose the correct answer form the options given below:

NEET-2024 [Microbes-in-Human-Welfare] [class-xii ]

  • A-II, B-IV, C-III, D-I
  • A-III, B-I, C-II, D-IV
  • A-IV, B-I, C-III, D-II
  • A-III, B-I, C-IV, D-II
    • Correct Option: D  [ A-III, B-I, C-IV, D-II ]

    Remark: Explanation: NCERT Page No. 183 (Topic-10.2.3 Chemicals, Enzymes and other Bioactive Molecules)
1