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.

Question

Quizplus · Accepted Answer

Cyclin A is encoded by an inducible gene, as its expression varies greatly throughout the cell cycle, reaching a peak at a specific phase. This suggests that its expression is regulated and induced at specific times, rather than being constitutive or part of an operon. It is not a transcription factor or part of a replicon.

The Expression of the Gene That Encodes Cyclin a Varies