Multiple choice

In a lac operon, RNA polymerase, which is on the promoter, moves to the structural genes to transcribe them. Under which of the following conditions does it happen?

  1. When regulator gene induces promoter

  2. When RNA polymerase shifts first to regulator gene

  3. When inducer binds to structural genes

  4. When there is no repressor on the operator

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When there is no repressor on the operator, RNA polymerase, which is on the promoter, moves to the structural genes to transcribe them.