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Microbes in Human Welfare · Question 12

NEET (UG) 2020MCQEasy📈 Topic in 0% papers+4−1
1

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

Answer

(4) Activated sludge

Solution

In secondary treatment, the effluent passes to a settling tank where bacterial flocs sediment as activated sludge.

As per NCERT, a small part of the activated sludge is pumped back into the aeration tank as inoculum, and the major part is pumped into large tanks called anaerobic sludge digesters, where anaerobic bacteria digest it.

Answer: (4)

NEET (UG) 2020

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2

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)
NEET (UG) 2020
3

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
NEET (UG) 2019
4

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
5

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
6

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

  1. Streptokinase
  2. Lipases
  3. Cyclosporin A
  4. Statin
NEET (UG) 2019
7

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
8

Select the mismatch :

  1. Rhodospirillum - Mycorrhiza
  2. Anabaena - Nitrogen fixer
  3. Rhizobium - Alfalfa
  4. Frankia - Alnus
NEET 2017
9

Which of the following in sewage treatment removes suspended solids ?

  1. Secondary treatment
  2. Tertiary treatment
  3. Primary treatment
  4. Sludge treatment
NEET 2017
10

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
11

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)

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