The Expression of the Gene That Encodes Cyclin a Varies

Multiple Choice

The expression of the gene that encodes cyclin A varies considerably across the cell cycle,reaching a peak at the G2 phase.No other gene is similarly expressed.Based on this information,one can conclude that cyclin A is

A) a transcription factor.
B) encoded by a constitutive gene.
C) encoded by an inducible gene.
D) part of an operon.
E) part of a replicon.