Final answer:
The correct role of DNA in protein synthesis is that it acts as a template for the production of RNA, which is later translated into proteins by ribosomes in the cytoplasm.
Step-by-step explanation:
The role of DNA in protein synthesis is to provide a template for the creation of RNA, which in turn is translated into amino acids that form proteins. This process begins with transcription, during which instructions on DNA are transcribed onto messenger RNA (mRNA) inside the cell nucleus.
The mRNA molecule, once modified, leaves the nucleus and enters the cytoplasm where it is translated. In translation, ribosomes read the genetic information on the mRNA and use this information to string amino acids together into a protein with the help of transfer RNA (tRNA) molecules.
Therefore, the correct answer is: B. DNA provides the template to create RNA, which is then translated into amino acids.