Question

Problem 2 (5 marks)

Gene expression can be regulated at 3 levels. Which are these 3 levels? Which mode of regulation is the slowest in response to time, and which is faster? Which is the most efficient in resource use? Explain.

Answer 1

Answer:

three levels are transcriptional initiation to RNA processing to post tranlational modification of protein .

Answer 2

Explanation is given below

Explanation:

Gene expression in bacteria can be regulated at three levels. We might regulate gene expression by following levels-

1. Transcriptional control
2. Translational control
3. Post-translational control (controlling protein function)

The fastest response time would be achieved through post-translational control. For example, Proteolytic activation of a clot-forming protein in blood clotting by sending of signals through nerves which is very fast is in part controlled by the interaction of proteins and small molecules with ion channel proteins.

The slowest response time would have achieved by transcriptional control which requires both the transcription of a gene and the translation of the mRNA.

The most efficient in resource use is transcriptional control. If there are no need, we don't even make mRNA, let alone synthesize proteins.