Which molecule or reaction supplies the energy for polymerization of nucleotides in the process of transcription?

Question

Quizplus · Accepted Answer

The phosphate bonds in the nucleotide triphosphates that serve as substrates supply the energy for polymerization of nucleotides during transcription. As each nucleotide triphosphate is added to the growing RNA chain, two of the phosphate groups are cleaved off, releasing energy that drives the formation of the phosphodiester bond between the new nucleotide and the previous nucleotide in the chain. The energy from ATP and the unwinding of the DNA molecule also play roles in transcription, but the primary source of energy for polymerization is the phosphate bonds in the nucleotide triphosphates.

Which Molecule or Reaction Supplies the Energy for Polymerization of Nucleotides