mRNA carries genetic information from DNA to the ribosomes for protein synthesis. Which option best describes this role?

• A. Carries Genetic Information From DNA to the Ribosomes for Protein Synthesis
• B. Becomes part of the Ribosome
• C. Carries Amino Acids to the Growing Protein
• D. Initiates DNA Replication

Answer: (B)

The main idea is that mRNA serves as a messenger carrying the genetic code from DNA to the ribosome so protein synthesis can occur. It carries the sequence of codons that specifies the order of amino acids in a protein, acting as the template used by the ribosome to assemble the polypeptide. mRNA is produced by transcription from DNA and then guides the ribosome during translation, where tRNA brings the corresponding amino acids. It does not become a permanent part of the ribosome; the ribosome is built from rRNA and proteins, and mRNA is only temporarily bound as it is read. Initiating DNA replication is a separate process driven by replication enzymes, not by mRNA.