NEET Biology NEET PYQ-Chemical Coordination

  • question_answer
    The 24 hour (diurnal) rhythm of our body such as the sleep-wake cycle is regulated by the hormone [AIPMT (M) 2011]

    A) calcitonin

    B) prolactin

    C) adrenaline

    D) melatonin

    Correct Answer: D

    Solution :

    [D] Melatonin, also known as chemically N-acetyl 5-methoxytryptamine is a naturally occurring compound found in animals, plants and microbes. In animals, circulating levels of the hormone melatonin vary in a daily cycle, thereby allowing the entraiment of the circadian rythrns of several biological functions.


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