Question

which best summarizes the process of protein synthesis?
rna instructs dna to make proteins.
dna unzips, resulting in the formation of two protein molecules.
rna moves the dna code to the ribosomes for protein synthesis.
dna makes proteins in the nucleus.

Explanation:

• In protein synthesis, DNA is transcribed into RNA (mRNA) in the nucleus. The mRNA then moves to the ribosomes (in the cytoplasm). The ribosomes use the mRNA (which carries the DNA code) to synthesize proteins.
• Option 1: RNA does not instruct DNA. DNA is the template for RNA synthesis (transcription).
• Option 2: When DNA unzips during replication, it forms two DNA molecules, not protein molecules.
• Option 4: DNA does not directly make proteins in the nucleus. Proteins are synthesized at ribosomes (with the help of RNA that carries the DNA code).

Answer:

RNA moves the DNA code to the ribosomes for protein synthesis.