Which of the following proteins is correctly matched with its function?

• A. Collagen - Catalyzes metabolic reactions
• B. Amylase - Synthesizes DNA
• C. Insulin - Provides structural support to cells
• D. Hemoglobin - Transports oxygen in the blood

Answer: (D)

Verified step by step guidance

1. Identify the function of each protein listed in the options.
2. Collagen is a structural protein that provides support to tissues, not a catalyst for metabolic reactions.
3. Amylase is an enzyme that catalyzes the breakdown of starch into sugars, not involved in DNA synthesis.
4. Insulin is a hormone that regulates blood glucose levels, not a structural protein.
5. Hemoglobin is a protein in red blood cells responsible for transporting oxygen from the lungs to the rest of the body.