Question

1. describe 3 functions of proteins.
2. describe the function of a peptide bond.

amino acid (1) amino acid (2)
r1 r2
peptide bond water
dipeptide
nucleic acids:

1. which elements make up nucleic acids?
2. what is the monomer of a nucleic acid?

Explanation:

1. Proteins have multiple functions. Catalysis: Enzymes (proteins) speed - up biochemical reactions. Structure: Collagen in connective tissues provides structural support. Transport: Hemoglobin in blood transports oxygen.
2. A peptide bond links amino acids together to form polypeptide chains, which then fold to form proteins.
3. Nucleic acids are made up of carbon (C), hydrogen (H), oxygen (O), nitrogen (N), and phosphorus (P).
4. The monomer of a nucleic acid is a nucleotide, which consists of a sugar, a phosphate group, and a nitrogen - containing base.

Answer:

1. a. Catalysis (enzymes speed - up reactions). b. Structure (e.g., collagen for support). c. Transport (e.g., hemoglobin for oxygen).
2. Links amino acids to form polypeptide chains.
3. Carbon, hydrogen, oxygen, nitrogen, phosphorus.
4. Nucleotide.