The site where RNA polymerase attaches to the DNA molecule to start the formation of mRNA is called a(n):
A)operon
B)exon
C)promoter
D)operator

Question

Quizplus · Accepted Answer

The site where RNA polymerase attaches to the DNA molecule to start the formation of mRNA is called a promoter. It contains specific nucleotide sequences that provide binding sites for RNA polymerase and other transcription factors. Option A (operon) refers to a group of genes that are controlled by a single promoter and are transcribed together. Option B (exon) refers to a region of DNA in a gene that codes for a part of the final mature mRNA molecule. Option D (operator) is a sequence of DNA that acts as a regulatory switch in controlling gene expression by binding with repressor proteins.

The Site Where RNA Polymerase Attaches to the DNA Molecule