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Cyclin Oscillation

APBIO-4GVLYN

"Control of the Cell Cycle." · Openstax Biology. N.p., n.d. Web. 05 Mar. 2016. http://philschatz.com/biology-book/contents/m44466.html.

The figure above shows the concentrations of various cyclins as a typical eukaryotic cell goes through the cell cycle.

What is the MOST logical explanation for the oscillation (rise and fall) in the expression of the unique cyclins at designated points in the cycle?

A

These proteins are made as a result of time spent in the particular phase and perform a function related to the phase.

B

The availability of the specific cyclin is how the timing of each step of the cell cycle is regulated.

C

Expression of each cyclin is essential to leave the phase in which expression occurs.

D

There is no biological relationship between the rise and fall of each cyclin and the different phases.