Which of the following is not a property of the sigma ( σ ) subunit?
A) It tells the RNA Polymerase where to sit down.
B) It helps point the RNA Polymerase in the proper direction.
C) It causes the RNA Polymerase to bind tightly to the DNA.
D) It stays with the RNA Polymerase throughout synthesis.

Question

Quizplus · Accepted Answer

The sigma (σ) subunit of RNA Polymerase is responsible for promoter recognition and initiation of transcription in bacteria. It helps the RNA Polymerase to bind to the promoter region of DNA and initiates transcription but does not stay with the RNA Polymerase throughout the synthesis. After the initiation phase, the sigma factor dissociates from the RNA Polymerase, allowing the core enzyme to continue the elongation phase of transcription.

Which of the Following Is Not a Property of the Sigma