Question

1. list and describe four functions of proteins.

Explanation:

Proteins have multiple functions. Structural support: like collagen in connective tissues. Enzymatic catalysis: enzymes speed up biochemical reactions. Transport: hemoglobin transports oxygen. Immune response: antibodies (immunoglobulins) fight pathogens.

Answer:

• Structural support: Provide framework (e.g., collagen).
• Enzymatic catalysis: Speed up reactions (e.g., amylase).
• Transport: Carry substances (e.g., hemoglobin).
• Immune response: Defend against invaders (e.g., antibodies).