At which of the following stages does transcriptional control occur? (a) DNA > (b) mRNA > (c) protein > (d) activated protein

-a

-b

-c

-All of the listed responses are correct.

-a

Explanation:

Transcriptional control or transcriptional regulation refers to control of the rate of gene transcription (conversion of DNA to RNA). This regulation enables the cell to respond to different environmental signals. It includes different types of mechanisms such as altering the number of copies of transcribed RNA or when the gene is transcribed (temporal control). Transcriptional gene regulation is usually performed by transcriptional factors and specific DNA sequences.