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Microbes in Human Welfare · Question 55

AIPMT 2009MCQEasy📈 Topic in 75% papers+4−1
1

Which one of the following pairs is wrongly matched?

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

Answer

(3) Alcohol – nitrogenase

Solution

As per NCERT, lipases are used in detergent formulations to remove oily stains, and pectinases (with proteases) are used to clarify bottled fruit juices.

Amylase is used in the textile industry for desizing (removal of starch).

Alcohol is produced by fermentation by yeast ( Saccharomyces cerevisiae), while nitrogenase is the enzyme of biological nitrogen fixation,

'Alcohol – nitrogenase' is wrongly matched.

Answer: (3)

AIPMT 2009

Keep practising — Microbes in Human Welfare

2

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
3

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
4

Modern detergents contain enzyme preparations of

  1. thermoacidophiles
  2. thermophiles
  3. acidophiles
  4. alkaliphiles
AIPMT 2008
5

Trichoderma harzianum has proved a useful microorganism for:

  1. biological control of soil-borne plant pathogens
  2. reclamation of wastelands
  3. gene transfer in higher plants
  4. bioremediation of contaminated soils
AIPMT 2008
6

Which one of the following proved effective for biological control of nematodal disease in plants?

  1. Pisolithus tinctorius
  2. Paecilomyces lilacinus
  3. Pseudomonas cepacia
  4. Gliocladium virens
AIPMT 2008
7

Probiotics are-

  1. Cancer inducing microbes
  2. New kind of food allergens
  3. Live microbial food supplement
  4. Safe antibiotics
AIPMT 2007
8

Which one of the following pairs is wrongly matched ?

  1. Methanogens – Gobar gas
  2. Yeast – Ethanol
  3. Streptomycetes – Antibiotic
  4. Coliforms – Vinegar
AIPMT 2007
9

Which one of the following statements is correct?

  1. Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and potassium for plant nutrition in soil
  2. Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants
  3. At present it is not possible to grow maize without chemical fertilizers
  4. Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies
Out of syllabusAIPMT 2007
10

Curing of tea leaves is brought about by the activity of

  1. fungi
  2. bacteria
  3. mycorrhiza
  4. viruses
AIPMT 2006
11

For retting of jute the fermenting microbe used is

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

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