The heptapeptide repeat in the carboxy terminal domain (CTD) in the RPB1 subunit of RNA polymerase II is phosphorylated to ____.
A) convert to an elongation complex
B) bind to DNA
C) form a holo-RNA polymerase II
D) initiate transcription
E) activate termination

Question

Quizplus · Accepted Answer

The heptapeptide repeat in the carboxy terminal domain (CTD) in the RPB1 subunit of RNA polymerase II is phosphorylated to convert RNA polymerase II into an elongation complex. This phosphorylation is essential for the transition from the transcription initiation phase to the transcription elongation phase.

The Heptapeptide Repeat in the Carboxy Terminal Domain (CTD) in the RPB1