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Microbes in Human Welfare · Question 38

AIPMT 2011 (Mains)MCQMedium📈 Topic in 12% papers+4−1
1

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

Answer

(2) (B), (C) and (D)

Solution

As per NCERT, organic farming avoids chemical fertilisers and chemical pesticides; it relies on naturally produced inputs such as compost, manure, biofertilisers and biocontrol agents.

(A) Incorrect: genetically modified crops such as Bt cotton are not used in organic farming.

(B) Correct: only natural inputs like compost are used.

(C) Correct: chemical pesticides and urea are not used.

(D) Correct: organically grown vegetables are considered to be rich in vitamins and minerals and free of chemical residues.

∴ (B), (C) and (D) are correct.

Answer: (2)

AIPMT 2011 (Mains)

Keep practising — Microbes in Human Welfare

2

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)
3

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)
4

Which one of the following is not a biofertilizer ?

  1. Agrobacterium
  2. Nostoc
  3. Rhizobium
  4. Mycorrhiza
AIPMT 2011 (Prelims)
5

Secondary sewage treatment is mainly a :

  1. Mechanical process
  2. Chemical process
  3. Biological process
  4. Physical process
AIPMT 2011 (Prelims)
6

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)
7

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

  1. Azotobacter
  2. Azospirillum
  3. Nostoc
  4. Rhizobium
AIPMT 2011 (Prelims)
8

Ethanol is commercially produced through a particular species of :

  1. Clostridium
  2. Trichoderma
  3. Aspergillus
  4. Saccharomyces
AIPMT 2011 (Prelims)
9

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)
10

Organisms called Methanogens are most abundant in a :

  1. Polluted stream
  2. Hot spring
  3. Cattle yard
  4. Sulphur rock
AIPMT 2011 (Prelims)
11

Which one of the following helps in absorption of phosphorus from soil by plants?

  1. Glomus
  2. Rhizobium
  3. Frankia
  4. Anabaena
Out of syllabusAIPMT 2011 (Prelims)

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