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Microbes in Human Welfare · Question 36

AIPMT 2012 (Prelims)MCQEasy📈 Topic in 25% papers+4−1
1

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

Answer

(3) Bread and beer

Solution

As per NCERT, the dough used for making bread is fermented using baker's yeast ( Saccharomyces cerevisiae), and the same yeast (brewer's yeast) is used for fermenting malted cereals and fruit juices to produce beverages such as beer, wine and whisky.

(1) Citric acid is produced by Aspergillus niger and lactic acid by Lactobacillus.

(2) Lipases are produced by microbes such as Candida; pectinases by Aspergillus / bacteria.

(4) Cheese and butter making involves bacteria and fungi other than yeast.

Answer: (3)

AIPMT 2012 (Prelims)

Keep practising — Microbes in Human Welfare

2

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)
3

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)
4

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)
5

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)
6

Which one of the following is not a biofertilizer ?

  1. Agrobacterium
  2. Nostoc
  3. Rhizobium
  4. Mycorrhiza
AIPMT 2011 (Prelims)
7

Secondary sewage treatment is mainly a :

  1. Mechanical process
  2. Chemical process
  3. Biological process
  4. Physical process
AIPMT 2011 (Prelims)
8

Which of the following is mainly produced by the activity of anaerobic bacteria on sewage ?

  1. Propane
  2. Mustard gas
  3. Marsh gas
  4. Laughing gas
AIPMT 2011 (Prelims)
9

An organism used as a Biofertilizer for raising soyabean crop is :

  1. Azotobacter
  2. Azospirillum
  3. Nostoc
  4. Rhizobium
AIPMT 2011 (Prelims)
10

Ethanol is commercially produced through a particular species of :

  1. Clostridium
  2. Trichoderma
  3. Aspergillus
  4. Saccharomyces
AIPMT 2011 (Prelims)
11

Continuous addition of sugars in 'fed batch' fermentation is done to :

  1. obtain antibiotics
  2. produce methane
  3. purify enzymes
  4. degrade sewage
AIPMT 2011 (Prelims)

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