Question

1. how do amino acids contribute to cellular functions?

store genetic information
initiate immune responses
build proteins
transport ions

Explanation:

• "Store genetic information" is done by nucleic acids (like DNA/RNA), not amino acids.
• "Initiate immune responses" is a function of immune cells/proteins (e.g., antibodies, but amino acids themselves don't initiate; they are building blocks).
• Amino acids are the monomers (building blocks) that are linked together via peptide bonds to form proteins. So they contribute to cellular functions by building proteins.
• "Transport ions" is done by ion channels or transporters (proteins), but amino acids themselves don't transport ions—they are used to make the proteins that do.

Answer:

C. Build proteins (assuming the options are labeled A, B, C, D with "Build proteins" as option C; if the original labeling was different, adjust the identifier but keep the text. Based on the options given, the correct one is the "Build proteins" option.)