Final answer:
The genetic code ensures the correct protein is made from mRNA, following the central dogma of molecular biology which describes the flow of genetic information from DNA to mRNA to protein.
Step-by-step explanation:
The genetic code is integral in the flow of genetic information as described by the central dogma of molecular biology, which is the process from DNA to mRNA to protein. The correct answer to the student's question is that the genetic code ensures the correct protein is made from the messenger RNA. Transcription is the generation of mRNA from DNA, and the sequence of three-nucleotide codons in this mRNA then guides the assembly of amino acids into proteins during translation, with the help of tRNA and rRNA.