Gala is studying for a quiz on circadian rhythms. She writes in her notes that the two proteins that influence circadian rhythms by building up during the day and declining during sleep are ______.
A) SCN and REM
B) TIM and SCN
C) PER and REM
D) PER and TIM

Question

Quizplus · Accepted Answer

The two proteins that influence circadian rhythms by building up during the day and declining during sleep are PER and TIM. SCN is a region of the brain that regulates the circadian rhythm, while REM is a stage of sleep. Therefore, options A and B are incorrect. REM is not a protein, so option C is also incorrect.

Gala Is Studying for a Quiz on Circadian Rhythms