Question

multiple choice question
which type of molecule is directly used in protein synthesis?

oxygen
lipids
rna
glucose

Explanation:

Protein synthesis relies on three main types of RNA: mRNA (carries genetic code), tRNA (delivers amino acids), and rRNA (forms ribosomes, the site of synthesis). Oxygen is used in cellular respiration, lipids are energy storage/structural molecules, and glucose is an energy source, none of which are directly involved in building proteins.

Answer:

C. RNA