Question

which substance carries instructions for building a protein to other parts of the cell?
oxygen
protein
ribosome
rna
done

Explanation:

To solve this, we analyze each option:

• Oxygen is involved in respiration, not protein - building instructions.
• Proteins are the end - product of the process, not the carrier of instructions for their own building.
• Ribosomes are the site of protein synthesis, not the carrier of instructions.
• RNA (specifically mRNA) carries the genetic code from DNA to the ribosome, where proteins are synthesized. It carries the instructions for building a protein to other parts of the cell.

Answer:

D. RNA