Question

what is the role of rna within the cell?

• rna contains instructions that code for protein synthesis.
• rna moves instructions for protein synthesis from the nucleus to ribosomes.
• rna is the structural unit that makes up dna.

Explanation:

Analyze the role of DNA versus RNA

DNA stores the master genetic instructions inside the nucleus, while RNA (specifically mRNA) carries these instructions out of the nucleus to the ribosomes in the cytoplasm where proteins are assembled.

Evaluate the given options

• Option 1: "RNA contains instructions that code for protein synthesis." (This is primarily the permanent role of DNA).
• Option 2: "RNA moves instructions for protein synthesis from the nucleus to ribosomes." (This correctly describes the transport and intermediary role of messenger RNA).
• Option 3: "RNA is the structural unit that makes up DNA." (Incorrect; nucleotides are the structural units, and RNA and DNA are distinct nucleic acids).

Answer:

• RNA contains instructions that code for protein synthesis.
• RNA moves instructions for protein synthesis from the nucleus to ribosomes. (Correct answer)
• RNA is the structural unit that makes up DNA.