If the Per Gene Is Key to Regulating Circadian Rhythms

question 1

Multiple Choice

If the per gene is key to regulating circadian rhythms, we can predict that

• A) the per gene acts independently of neurons in the SCN to modulate daily behaviors.
• B) the per gene must be a newly evolved mechanism that is not present in more primitive animals.
• C) per expression should increase continuously over time if no environmental cues are provided.
• D) animals with low per expression, and thus little PER protein production, should not have a circadian rhythm.

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