In transcription, the energy to attach each successive ribonucleotide to the growing RNA chain comes from:
A)the RNA polymerase itself.
B)cleavage of the high-energy phosphate bonds of the incoming nucleotide.
C)cleavage of the high-energy phosphate bonds of the growing transcript.
D)cleavage of the 2' hydroxyl group on the ribose of the incoming nucleotide.

Question

Quizplus · Accepted Answer

The energy to attach each successive ribonucleotide to the growing RNA chain comes from cleavage of the high-energy phosphate bonds of the incoming nucleotide. This releases the energy needed for formation of the phosphodiester bond between the 3' hydroxyl group of the previous nucleotide and the 5' phosphate group of the incoming nucleotide.

In Transcription, the Energy to Attach Each Successive Ribonucleotide to the Growing