which is composed of amino acids and determines all the structures and functions of organisms?\ndna\nribosome…

Brief Explanations:

Proteins are composed of amino - acid monomers. They play crucial roles in determining the structures and functions of organisms, such as enzymes catalyzing reactions, structural proteins like collagen. DNA contains genetic information, ribosomes are sites of protein synthesis, and mRNA is a messenger carrying genetic code for protein synthesis.

Answer:

D. protein