What is the difference between a promoter and a start codon?

Question

A. Promoters identify translation start sites on an mRNA while start codons are regions of DNA where transcription starts.

B. Promoters are regions of DNA where transcription starts while start codons are the first bases to be translated on an mRNA.

C. Promoters identify splice sites on pre-mRNA while start codons identify translation start sites on an mRNA.

D. Promoters are present after the 5’ Cap and remain untranslated while start codons recruit RNA polymerase to start transcription.

Answer 1

The promoter sequence is the recognition site for the attachment of RNA polymerase, the enzyme responsible for transcription. The initiator or start  codon on m-RNA is the sequence AUG, and corresponds to the amino acid methionine.

The answer would be B.