Question

which statement best describes the role of mrna in protein synthesis?

a splits the dna molecule into two strands
b copies the genetic code from the dna molecule and carries it to the ribosome
c stores the genetic code in the nucleus
d carries ten amino acid to the ribosome.

Explanation:

To determine the role of mRNA in protein synthesis:

• Option a: Splitting DNA into two strands is done by helicase, not mRNA. Eliminate a.
• Option b: mRNA is transcribed from DNA (copying the genetic code) and then travels to the ribosome for translation. This matches mRNA's function.
• Option c: DNA stores the genetic code in the nucleus, not mRNA. Eliminate c.
• Option d: tRNA carries amino acids to the ribosome, not mRNA. Eliminate d.

Answer:

b. Copies the genetic code from the DNA molecule and carries it to the ribosome.