During protein synthesis, ribosomes:

A) attach to the mRNA molecule and travel along its length to produce a polypeptide
B) attach to the DNA molecule and travel along its length to produce an mRNA molecule
C) translate mRNA into tRNA
D) transcribe DNA into mRNA
E) translate tRNA into protein

Ribosomes

Cellular structures that synthesize proteins by translating mRNA into polypeptide chains.

Polypeptide

A linear organic polymer consisting of a large number of amino acid residues bonded together, forming part of (or the whole of) protein molecules.

mRNA

Messenger RNA, a type of RNA that carries genetic information from DNA to the ribosome, where it specifies the amino acid sequence of the protein products of gene expression.