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Microbes in Human Welfare · Question 19

NEET 2017MCQEasy📈 Topic in 12% papers+4−1
1

Select the mismatch :

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

Answer

(1) Rhodospirillum - Mycorrhiza

Solution

⇒ Rhodospirillum is a free-living, anaerobic, photosynthetic nitrogen-fixing bacterium; mycorrhiza is a symbiotic association of fungi (e.g. Glomus) with plant roots ⇒ mismatch.

⇒ Anabaena is a cyanobacterium that fixes atmospheric nitrogen ⇒ correct.

⇒ Rhizobium forms root nodules in legumes such as alfalfa ⇒ correct.

⇒ Frankia forms nitrogen-fixing root nodules in the non-leguminous plant Alnus ⇒ correct.

Answer: (1)

NEET 2017

Keep practising — Microbes in Human Welfare

2

Which of the following in sewage treatment removes suspended solids ?

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

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
4

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)
5

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
6

The guts of cow and buffalo possess

  1. Cyanobacteria
  2. Fucus sp.
  3. Methanogens
  4. Chlorella sp.
AIPMT 2015 (Cancelled)
7

What gases are produced in anaerobic sludge digesters ?

  1. Methane and CO2 only
  2. Methane, Hydrogen Sulphide and O2
  3. Methane, Hydrogen Sulphide and CO2
  4. Hydrogen Sulphide and CO2
AIPMT 2014
8

A good producer of citric acid is

  1. Clostridium
  2. Saccharomyces
  3. Aspergillus
  4. Pseudomonas
NEET 2013
9

Microbe used for biocontrol of pest butterfly caterpillars is :

  1. Streptococcus sp.
  2. Trichoderma sp.
  3. Saccharomyces cerevisiae
  4. Bacillus thuringiensis
NEET 2013 (Karnataka)
10

In gobar gas, the maximum amount is that of :

  1. Propane
  2. Butane
  3. Methane
  4. Carbon dioxide
AIPMT 2012 (Mains)
11

The domestic sewage in large cities :

  1. has very high amounts of suspended solids and dissolved salts
  2. has a high BOD as it contains both aerobic and anaerobic bacteria.
  3. is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plant (STPs)
  4. When treated in STPs does not really require the aeration step as the sewage contains adequate oxygen
AIPMT 2012 (Mains)

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