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Question 21N.1.SL.TZ0.29

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Date November 2021 Marks available [Maximum mark: 1] Reference code 21N.1.SL.TZ0.29
Level SL Paper 1 Time zone TZ0
Command term Question number 29 Adapted from N/A
29.
[Maximum mark: 1]
21N.1.SL.TZ0.29

Which hormone regulates the hours of sleep and wakefulness?

A. Thyroxine

B. Insulin

C. Leptin

D. Melatonin

[1]

Markscheme

D

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