Which describes the main purpose of RNA polymerase during transcription? A. RNA polymerase pulls apart the double helix.

B. RNA polymerase is guided to the coding region.

C. RNA polymerase reaches the end of the gene.

D. RNA polymerase produces mRNA from DNA.

It's D

Explanation:

RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence, during the process of transcription.

The correct answer is D.

Explanation:

AP3X

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.