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  9. Q37

TGPSC Group-I 2023 · Question 37 of 136

Consider the following statements : A. Circadian rhythm is endogenous rhythmic change in organism with a periodicity of 24 hours. B. Biological clock regulates circadian rhythm. C. Sleep and awake phases of humans are due to circadian rhythm. D. Heart - beat of humans is an example of circadian rhythm. Which of the above statements are correct ?

Science and Technology

  1. AA, B and D only
  2. BA, C and D only
  3. CB, C and D only
  4. DA, B and C onlyCorrect

Answer: D. A, B and C only

Explanation

A, B and C are correct; D is wrong — human heartbeat is ultradian (about a second per beat), not circadian.

Source: TGPSC Group-I Preliminary Test 2023 official question paper (held 11 Jun 2023)

← Q36View full paper (136 questions)Q38 →

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