Question

1. proteins are composed of what smaller subunits? *

nucleotides
fatty acids
amino acids
nucleic acids

1. enzymes are a *
2. protein
3. lipid
4. carbohydrate
5. nucleic acid

Explanation:

Question 6

Proteins are macromolecules made by linking smaller units called amino acids via peptide bonds. Nucleotides are subunits of nucleic acids, fatty acids are part of lipids, and nucleic acids are a different macromolecule type (like DNA/RNA). So the correct subunit for proteins is amino acids.

Enzymes are biological catalysts, and most enzymes are proteins (some are RNA, but the common case in basic biology is proteins). Lipids are fats/oils, carbohydrates are sugars/starch, and nucleic acids are DNA/RNA. So enzymes are typically proteins.

Answer:

C. amino acids

Question 8