Question

which explains a difference between prokaryotic and eukaryotic gene regulation?
o a. prokaryotes do not have mrna, so they do not have processes to degrade mrna.
o b. eukaryotic gene regulation is controlled by more than one promoter and one regulator.
o c. eukaryotes utilize operons, so they do not need to produce sections of mrna.
o d. prokaryotes process dna in the nucleus, so genes do not need to be activated.

Explanation:

• Option A: Prokaryotes do have mRNA. They have simpler gene regulation compared to eukaryotes.
• Option B: Eukaryotic gene regulation is more complex. It involves multiple promoters and regulators. For example, there are different types of transcription factors (activators and repressors) that can bind to various regulatory regions (enhancers, silencers) in addition to the core promoter.
• Option C: Prokaryotes utilize operons (a cluster of genes under the control of a single promoter - operator system). Eukaryotes do not have operons in the same sense. Their gene regulation is more diverse and not based on the operon model.
• Option D: Prokaryotes do not have a nucleus. Their DNA is in the cytoplasm. And gene activation is still required as they need to express genes for various functions like metabolism, response to the environment etc.

Answer:

B. Eukaryotic gene regulation is controlled by more than one promoter and one regulator.