Question

question 4 of 10
which statement best describes the difference between gene regulation in prokaryotes and eukaryotes?
a. prokaryotes use transcription factors, while eukaryotes mostly group genes into operons.
b. prokaryotes have promoter regions, while eukaryotes use only operator regions.
c. prokaryotes regulate only during transcription, while eukaryotes can regulate during any stage of protein synthesis.
d. prokaryotes only regulate the production of enzymes, while eukaryotes regulate the production of all proteins.

Explanation:

Step1: Analyze Option A

Prokaryotes group genes into operons, eukaryotes use transcription factors. So A is wrong.

Step2: Analyze Option B

Both prokaryotes and eukaryotes have promoter regions. Eukaryotes don't only have operator regions. So B is wrong.

Step3: Analyze Option C

Prokaryotes mainly regulate at transcription. Eukaryotes can regulate at transcription (e.g., chromatin remodeling), post - transcription (e.g., mRNA processing), translation, and post - translation (e.g., protein modification) stages. So C is correct.

Step4: Analyze Option D

Prokaryotes regulate production of various proteins (not just enzymes), and eukaryotes regulate all proteins. But the key difference is the stage of regulation. So D is wrong.

Answer:

C. Prokaryotes regulate only during transcription, while eukaryotes can regulate during any stage of protein synthesis.