Question

which is composed of amino acids and determines all the structures and functions of organisms?
○ dna
○ ribosome
○ mrna
○ protein

Explanation:

• DNA is made of nucleotides, not amino acids.
• Ribosomes are organelles (composed of RNA and protein) that synthesize proteins, not made of amino acids as the main component determining all organism structures/functions.
• mRNA is a type of RNA (nucleotide - based) that carries genetic info for protein synthesis.
• Proteins are polymers of amino acids and are responsible for most of the structures and functions in organisms (e.g., enzymes, structural components like collagen, transport proteins, etc.).

Answer:

D. protein