1. Tardigrade
  2. Question
  3. Biology
  4. Assertion: The predominant site for control of gene expression in prokaryotes is transcription initiation. Reason: The activity of RNA polymerase is regulated by accessory proteins, which affect recognition of start sites.

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Assertion : The predominant site for control of gene expression in prokaryotes is transcription initiation.
Reason : The activity of $RNA$ polymerase is regulated by accessory proteins, which affect recognition of start sites.

Molecular Basis of Inheritance

Solution:

In prokaryotes, control of the rate of transcriptional initiation is the predominant site for control of gene expression. In a transcription unit, the activity of $RNA$ polymerase at a given promoter is in turn regulated by interaction with accessory proteins, which affect its ability to recognise start sites. These regulatory proteins can act both positively (activators) and negatively (repressors).