Final answer:
mRNA copies and transports DNA's genetic code to the ribosome, where protein synthesis then takes place through transcription and translation processes.
Step-by-step explanation:
DNA's genetic information is copied to form messenger RNA (mRNA), which then delivers it to the ribosome where protein synthesis occurs. During the process known as transcription, an mRNA molecule is synthesized using DNA as a template, ensuring that the genetic code is accurately transmitted from the relatively protected environment of the nucleus to the site of protein synthesis in the cytoplasm. This step is critical because the DNA, which contains genetic instructions, cannot leave the nucleus of eukaryotic cells. Consequently, mRNA must carry these instructions to the ribosomes where, during translation, ribosomal RNA (rRNA) and transfer RNA (tRNA) play pivotal roles in the assembly of amino acids to form the specific proteins dictated by the mRNA sequence.