Which statement best describes the function of protein in the body?

Which statement best describes the function of protein in the body?

• A. Providing energy as the primary source
• B. Building tissues and supporting muscles and immunity
• C. Storing genetic information
• D. Regulating hormones only

Answer: (B)

Proteins act as the body's builders and defenders. Their main role is to build and repair tissues, support the growth and maintenance of muscles, and defend the body through antibodies in the immune system. While proteins do participate in energy use and various regulatory functions, energy is primarily supplied by carbohydrates and fats, not proteins. DNA stores genetic information, so storing genetic information isn’t a protein function. Hormones can be protein-based, but describing proteins only as regulators of hormones is too narrow. So, describing proteins as building tissues and supporting muscles and immunity best captures their central role in the body.

Proteins act as the body's builders and defenders. Their main role is to build and repair tissues, support the growth and maintenance of muscles, and defend the body through antibodies in the immune system. While proteins do participate in energy use and various regulatory functions, energy is primarily supplied by carbohydrates and fats, not proteins. DNA stores genetic information, so storing genetic information isn’t a protein function. Hormones can be protein-based, but describing proteins only as regulators of hormones is too narrow. So, describing proteins as building tissues and supporting muscles and immunity best captures their central role in the body.