Physiology and Metabolism

JKPSC Assistant Professor (Botany) · Botany · 83 practice questions with answers and explanations: 13 Easy, 70 Medium, 0 Hard.

Sample questions

Sample Easy question 1

Which hormone causes the closure of stomata during water stress?

  1. Gibberellin
  2. Cytokinin
  3. Abscisic acid
  4. Auxin
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Answer: C. It is called the stress hormone.

Sample Easy question 2

Vernalisation is the promotion of flowering by:

  1. Exposure to low temperature
  2. Auxins
  3. High light intensity
  4. Long days
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Answer: A. Winter wheat requires it.

Sample Easy question 3

In the Krebs cycle, the first compound formed is:

  1. Fumaric acid
  2. Succinic acid
  3. Oxaloacetic acid
  4. Citric acid
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Answer: D. Acetyl CoA combines with oxaloacetate.

Sample Medium question 4

The TCA cycle was worked out by:

  1. Calvin
  2. Hans Krebs
  3. Meyerhof
  4. Embden
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Answer: B. He got the Nobel Prize in 1953.

Sample Medium question 5

The first product of the Krebs cycle is:

  1. Malate
  2. Oxaloacetate
  3. Fumarate
  4. Citric acid
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Answer: D. Acetyl CoA joins oxaloacetate.

Sample Medium question 6

The terminal electron acceptor in the electron transport chain is:

  1. Cytochrome c
  2. Oxygen
  3. FAD
  4. NAD⁺
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Answer: B. It forms water.

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