1.The mammal master biological clock is (choose all the apply):found in a region of neurons called t

1.The mammal master biological clock is (choose all the apply):found in a region of neurons called the suprachiasmatic nuclei (SCN) in the hypothalamus of the brainregulates sleep, metabolism, and hormone productionresponds to external cues such as light and darknessare asynchronous with “local” clocks that sit in organs2. Most organisms have a circadian clock that is exactly 24 hours long, like the day/night cycle of the earth.TrueFalse3. Which of the following are true about the molecular biology of the mammalian circadian clock? (Choose all the apply.)PER and CRY proteins interfere with the production of more PER and CRY protein.PER and CRY proteins are made but there is a delay before they start functioning (as transcription inhibitors of the per and cry genes)The function of circadian clock genes and proteins is an example of negative feedbackThe function of circadian clock genes and proteins is an example of positive feedback

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