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Microbes in Human Welfare · Question 32

AIPMT 2012 (Prelims)MCQEasy📈 Topic in 75% papers+4−1
1

Monascus purpureus is a yeast used commercially in the production of:

  1. Ethanol
  2. Streptokinase for removing clots from the blood vessels
  3. Citric acid
  4. Blood cholesterol lowering statins

Answer

(4) Blood cholesterol lowering statins

Solution

As per NCERT, statins produced by the yeast Monascus purpureus have been commercialised as blood-cholesterol lowering agents.

Statins competitively inhibit the enzyme responsible for synthesis of cholesterol.

(Ethanol – Saccharomyces cerevisiae; streptokinase – Streptococcus; citric acid – Aspergillus niger.)

Answer: (4)

AIPMT 2012 (Prelims)

Keep practising — Microbes in Human Welfare

2

A patient brought to a hospital with myocardial infarction is normally immediately given

  1. Penicillin
  2. Streptokinase
  3. Cyclosporin A
  4. Statins
AIPMT 2012 (Prelims)
3

A nitrogen-fixing microbe associated with Azolla in rice fields is

  1. Tolypothrix
  2. Spirulina
  3. Frankia
  4. Anabaena
AIPMT 2012 (Prelims)
4

Which one of the following is an example of carrying out biological control of pests/diseases using microbes?

  1. Trichoderma sp. against certain plant pathogens
  2. Ladybird beetle against aphids in mustard
  3. Nucleopolyhedrovirus against white rust in Brassica
  4. Bt-cotton to increase cotton yield
AIPMT 2012 (Prelims)
5

Yeast is used in the production of

  1. Citric acid and lactic acid
  2. Lipase and pectinase
  3. Bread and beer
  4. Cheese and butter
AIPMT 2012 (Prelims)
6

Read the following statement having two blanks (A and B): “A drug used for (A) patients is obtained from a species of the organism (B) .” The one correct option for the two blanks is:

  1. A Organ-transplant, B Trichoderma
  2. A AIDS, B Pseudomonas
  3. A Swine flu, B Monascus
  4. A Heart, B Penicillium
AIPMT 2011 (Mains)
7

Consider the following statements (A-D) about organic farming. Which of these statements are correct?

  1. (B) and (C) only
  2. (B), (C) and (D)
  3. (C) and (D) only
  4. (A) and (B) only
AIPMT 2011 (Mains)
8

Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct?

  1. Acetobacter aceti – acetic acid
  2. Clostridium butylicum – lactic acid
  3. Aspergillus niger – citric acid
  4. Yeast – statins
AIPMT 2011 (Mains)
9

The most common substrate used in distilleries for the production of ethanol is :

  1. Ground gram
  2. Molasses
  3. Soyabean
  4. Corn meal
AIPMT 2011 (Prelims)
10

Which one of the following is not a biofertilizer ?

  1. Agrobacterium
  2. Nostoc
  3. Rhizobium
  4. Mycorrhiza
AIPMT 2011 (Prelims)
11

Secondary sewage treatment is mainly a :

  1. Mechanical process
  2. Chemical process
  3. Biological process
  4. Physical process
AIPMT 2011 (Prelims)

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