As per and tim proteins degrade over time,
A)the clock protein is inhibited, leading to greater production of per and tim.
B)the clock protein is activated, leading to greater production of per and tim.
C)more melatonin is released by the pineal gland, leading to greater production of per and tim.
D)the suprachiasmatic nucleus (SCN) is inhibited, leading to less production of per and tim.

Question

As per and tim proteins degrade over time,​ 
A)the clock protein is inhibited, leading to greater production of per and tim. 
B)the clock protein is activated, leading to greater production of per and tim. 
C)more melatonin is released by the pineal gland, leading to greater production of per and tim. 
D)the suprachiasmatic nucleus (SCN) is inhibited, leading to less production of per and tim.

Quizplus · Accepted Answer

As per and tim proteins degrade over time, the clock protein is activated, leading to greater production of per and tim. This is because the decrease in per and tim levels removes their inhibitory effect on the clock protein, allowing it to activate transcription of per and tim again. This creates a feedback loop that maintains the circadian rhythm.

As Per and Tim Proteins Degrade Over Time,​

As Per and Tim Proteins Degrade Over Time,