The biological clock controlling circadian rhythms must ultimately ________.
A) depend on environmental cues
B) affect gene transcription
C) stabilize on a 24-hour cycle
D) speed up or slow down with increasing or decreasing temperature

Question

Quizplus · Accepted Answer

The biological clock controlling circadian rhythms is primarily controlled by gene transcription, as certain clock genes are responsible for regulating the oscillations of the clock. Environmental cues such as light and temperature can influence the clock, but ultimately the clock is driven by gene expression. The clock must also stabilize on a 24-hour cycle in order to maintain proper control of physiological and behavioral rhythms. Temperature can affect the speed of clock gene oscillations, but this is not the ultimate controlling factor of the biological clock.

The Biological Clock Controlling Circadian Rhythms Must Ultimately ________