Asked by Frank Cevallos on May 30, 2024

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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.

Per Gene

An approach emphasizing the role of individual genes in the process of evolution and adaptation.

Circadian Rhythms

Biological processes that display an endogenous, entrainable oscillation of about 24 hours, regulating various physiological processes including the sleep-wake cycle.

PER Protein

A core component of the circadian clock in organisms, involved in maintaining the internal biological rhythm in sync with environmental cycles.

  • Acquire knowledge of the concept of circadian rhythms and their impact on the behavior patterns of animals.
  • Analyze the physiological basis of circadian and circannual rhythmic patterns.
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ZK
Zybrea KnightJun 06, 2024
Final Answer :
D
Explanation :
The per gene is crucial for the production of the PER protein, which is integral to the functioning of the circadian clock. Animals with low per expression would produce less PER protein, disrupting the circadian rhythm.