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Microbes in Human Welfare · Question 64

AIPMT 2006MCQEasy📈 Topic in 75% papers+4−1
1

Curing of tea leaves is brought about by the activity of

  1. fungi
  2. bacteria
  3. mycorrhiza
  4. viruses

Answer

(2) bacteria

Solution

Curing (fermentation) of freshly plucked tea leaves, like the curing of tobacco leaves, is brought about by bacteria (e.g. Micrococcus) that act on the leaves and develop their flavour and aroma.

∴ Curing of tea leaves is a bacterial activity.

Answer: (2)

AIPMT 2006

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2

For retting of jute the fermenting microbe used is

  1. methanophilic bacteria
  2. butyric acid bacteria
  3. Helicobacter pylori
  4. Streptococcus lactis.
AIPMT 2005
3

A free living nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is

  1. Tolypothrix
  2. Chlorella
  3. Nostoc
  4. Anabaena
AIPMT 2004
4

Dough kept overnight in warm weather becomes soft and spongy because of :-

  1. Cohesion
  2. Absorption of carbon dioxide from atmosphere
  3. Osmosis
  4. Fermentation
AIPMT 2004
5

Which one of the following pairs is not correctly matched ?

  1. Spirulina – Single cell protein
  2. Streptomyces – Antibiotic
  3. Rhizobium – Biofertilizer
  4. Serratia – Drug addiction
AIPMT 2004
6

A major component of gobar gas is

  1. ethane
  2. methane
  3. butane
  4. ammonia
AIPMT 2004
7

Which of the following plants are used as green manure in crop fields and in sandy soils ?

  1. Calotropis procera and Phyllanthus niruri
  2. Dichanthium annulatum and Azolla nilotica
  3. Saccharum munja and Lantana camara
  4. Crotalaria juncea and Alhagi camelorum
AIPMT 2003
8

During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undegraded :-

  1. Lignin
  2. Cellulose
  3. Hemi-cellulose
  4. Lipids
AIPMT 2003
9

Which bacteria is utilized in Gobar gas plant ?

  1. Nitrifying bacteria
  2. Methanogens
  3. Ammonifying bacteria
  4. Denitrifying bacteria
AIPMT 2002
10

During the formation of bread it becomes porous due to release of CO2 by the action of : -

  1. Protozoans
  2. Bacteria
  3. Yeast
  4. Virus
AIPMT 2002
11

Which of the following is a true pair of biofertilizers?

  1. Nostoc and legume
  2. Rhizobium and grasses
  3. Salmonella and E. coli
  4. Azolla and BGA
AIPMT 2001

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