Question

question 19 of 25
prokaryotic cells regulate gene expression by controlling which process?
a. transcription
b. replication
c. protein folding
d. translation

Explanation:

Prokaryotic cells mainly regulate gene expression at the transcription level. This is because it is an energy - efficient way to control which genes are made into RNA (and eventually proteins). For example, in the lac operon, the presence or absence of lactose controls the transcription of genes related to lactose metabolism. Replication is for DNA duplication (not gene expression regulation in this context). Protein folding is a post - translational process and translation is the process of making proteins from mRNA (but regulation at translation is less common in prokaryotes compared to transcription).

Answer:

A. Transcription