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Microbes in Human Welfare · Question 68

AIPMT 2004MCQMedium📈 Topic in 75% papers+4−1
1

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

Answer

(4) Serratia – Drug addiction

Solution

⇒ Spirulina is grown as a rich source of single cell protein (SCP) – correct.

⇒ Streptomyces produces antibiotics such as streptomycin – correct.

⇒ Rhizobium (symbiotic nitrogen fixer in root nodules of legumes) is a biofertiliser – correct.

⇒ Serratia is a bacterium; it has no relation to drug addiction (its enzyme serratiopeptidase is used as an anti-inflammatory drug).

∴ The pair Serratia – Drug addiction is not correctly matched.

Answer: (4)

AIPMT 2004

Keep practising — Microbes in Human Welfare

2

A major component of gobar gas is

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

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
4

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
5

Which bacteria is utilized in Gobar gas plant ?

  1. Nitrifying bacteria
  2. Methanogens
  3. Ammonifying bacteria
  4. Denitrifying bacteria
AIPMT 2002
6

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
7

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
8

Which aquatic fern performs nitrogen fixation?

  1. Azolla
  2. Nostoc
  3. Salvia
  4. Salvinia
Out of syllabusAIPMT 2001
9

What is B.O.D.?

  1. The total amount of O2 present in water
  2. The amount of O2 utilised by organisms in water
  3. The amount of O2 utilised by microorganisms for decomposition
  4. All of the above
Out of syllabusAIPMT 2001
10

Which aquatic fern is used to increase the yield in paddy crop?

  1. Salvinia
  2. Isoetes
  3. Marsilea
  4. Azolla
AIPMT 2000
11

Which of the following is used to manufacture ethanol from starch?

  1. Saccharomyces
  2. Lactobacillus
  3. Azotobacter
  4. Penicillium
AIPMT 2000

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