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Microbes in Human Welfare · Question 47

AIPMT 2011 (Prelims)MCQEasy📈 Topic in 0% papers+4−1
1

Organisms called Methanogens are most abundant in a :

  1. Polluted stream
  2. Hot spring
  3. Cattle yard
  4. Sulphur rock

Answer

(3) Cattle yard

Solution

As per NCERT, methanogens (e.g., Methanobacterium) are found in the anaerobic sludge and in the rumen of cattle, where they help in cellulose digestion.

⇒ The dung of cattle (gobar) is rich in these bacteria.

∴ Methanogens are most abundant in a cattle yard.

Answer: (3)

AIPMT 2011 (Prelims)

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2

Which one of the following helps in absorption of phosphorus from soil by plants?

  1. Glomus
  2. Rhizobium
  3. Frankia
  4. Anabaena
Out of syllabusAIPMT 2011 (Prelims)
3

An example of endomycorrhiza is -

  1. Nostoc
  2. Rhizobium
  3. Glomus
  4. Agaricus
AIPMT 2010 (Mains)
4

Select the correct statement from the following:

  1. Methanobacterium is an aerobic bacterium found in rumen of cattle
  2. Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria
  3. Biogas, commonly called gobar gas, is pure methane
  4. Biogas is produced by the activity of aerobic bacteria on animal waste
AIPMT 2010 (Prelims)
5

A common biocontrol agent for the control of plant diseases is –

  1. Bacillus thuringiensis
  2. Trichoderma
  3. Glomus
  4. Baculovirus
AIPMT 2010 (Prelims)
6

The common nitrogen-fixer in paddy fields is –

  1. Azospirillum
  2. Frankia
  3. Rhizobium
  4. Oscillatoria
AIPMT 2010 (Prelims)
7

Which one of the following is not used in organic farming ?

  1. Earthworm
  2. Oscillatoria
  3. Snail
  4. Glomus
AIPMT 2010 (Prelims)
8

Which of the following is a symbiotic nitrogen fixer?

  1. Azotobacter
  2. Frankia
  3. Azolla
  4. Glomus
AIPMT 2009
9

Which one of the following pairs is wrongly matched?

  1. Detergents – lipase
  2. Fruit juice – pectinase
  3. Alcohol – nitrogenase
  4. Textile – amylase
AIPMT 2009
10

Which of the following is not used as a biopesticide?

  1. Bacillus thuringiensis
  2. Trichoderma harzianum
  3. Nuclear Polyhedrosis Virus (NPV)
  4. Xanthomonas campestris
AIPMT 2009
11

The bacterium Bacillus thuringiensis is widely used in contemporary biology as -

  1. Indicator of water pollution
  2. Agent for production of dairy products
  3. Source of industrial enzyme
  4. Insecticide
AIPMT 2009

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