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Microbes in Human Welfare · Question 14

NEET (UG) 2019MCQEasy📈 Topic in 0% papers+4−1
1

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

Answer

(4) Trichoderma, Baculovirus, Bacillus thuringiensis

Solution

As per NCERT, the biocontrol agents described are:

• Bacillus thuringiensis (Bt) – bacterium used to control butterfly caterpillars

• Trichoderma – free-living fungus, effective against several plant pathogens

• Baculoviruses (genus Nucleopolyhedrovirus) – pathogens of insects and other arthropods

∵ Oscillatoria, Nostoc (cyanobacteria), Rhizobium and Azospirillum are biofertilisers, and Tobacco mosaic virus and aphids are plant pests/pathogens,

∴ the correct group is Trichoderma, Baculovirus, Bacillus thuringiensis.

Answer: (4)

NEET (UG) 2019

Keep practising — Microbes in Human Welfare

2

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)
NEET (UG) 2019
3

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

  1. Anabaena
  2. Lactobacillus
  3. Trichoderma
  4. Chlorella
NEET (UG) 2019
4

Which of the following is a commercial blood cholesterol lowering agent?

  1. Streptokinase
  2. Lipases
  3. Cyclosporin A
  4. Statin
NEET (UG) 2019
5

Conversion of milk to curd improves its nutritional value by increasing the amount of

  1. vitamin D
  2. vitamin A
  3. vitamin B12
  4. vitamin E
NEET 2018
6

Select the mismatch :

  1. Rhodospirillum - Mycorrhiza
  2. Anabaena - Nitrogen fixer
  3. Rhizobium - Alfalfa
  4. Frankia - Alnus
NEET 2017
7

Which of the following in sewage treatment removes suspended solids ?

  1. Secondary treatment
  2. Tertiary treatment
  3. Primary treatment
  4. Sludge treatment
NEET 2017
8

Which of the following is correctly matched for the product produced by them ?

  1. Acetobacter aceti : Antibiotics
  2. Penicillium notatum : Acetic acid
  3. Methanobacterium : Lactic acid
  4. Saccharomyces cerevisiae : Ethanol
NEET 2017
9

Which of the following is wrongly matched in the given table?

  1. Microbe - Streptococcus, Product - Streptokinase, Application - Removal of clot from blood vessel
  2. Microbe - Trichoderma polysporum, Product - Cyclosporin A, Application - Immunosuppressive drug
  3. Microbe - Monascus purpureus, Product - Statins, Application - Lowering of blood cholesterol
  4. Microbe - Clostridium butylicum, Product - Lipase, Application - Removal of oil stains
NEET 2016 (Phase 1)
10

Match the following list of microbes and their importance -

  1. (a) - (iii), (b) - (i), (c) - (iv), (d) - (ii)
  2. (a) - (iii), (b) - (iv), (c) - (i), (d) - (ii)
  3. (a) - (iv), (b) - (ii), (c) - (i), (d) - (iii)
  4. (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
AIPMT 2015
11

The guts of cow and buffalo possess

  1. Cyanobacteria
  2. Fucus sp.
  3. Methanogens
  4. Chlorella sp.
AIPMT 2015 (Cancelled)

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