What is the primary role of protein?

What is the primary role of protein?

• A. Provide energy primarily
• B. Maintain body tissue and support growth
• C. Store vitamins
• D. Regulate nerve impulses

Answer: (B)

Proteins are best understood as the body's builders and repairers. Their primary role is to maintain body tissue and support growth by providing the amino acids needed to form muscles, skin, connective tissue, and other structures, and to replace cells that wear out. In addition to building, proteins function as enzymes that drive chemistry, as hormones that coordinate bodily processes, and as antibodies that defend against infections, along with helping transport substances and maintain fluid balance. Energy is not the main job of protein; it can be used for energy if carbohydrate intake is insufficient, but carbohydrates and fats are the primary energy sources. They do not store vitamins, and while some proteins participate in signaling, regulating nerve impulses relies more on ions and neurotransmitters than on protein storage or primary function.

Proteins are best understood as the body's builders and repairers. Their primary role is to maintain body tissue and support growth by providing the amino acids needed to form muscles, skin, connective tissue, and other structures, and to replace cells that wear out. In addition to building, proteins function as enzymes that drive chemistry, as hormones that coordinate bodily processes, and as antibodies that defend against infections, along with helping transport substances and maintain fluid balance. Energy is not the main job of protein; it can be used for energy if carbohydrate intake is insufficient, but carbohydrates and fats are the primary energy sources. They do not store vitamins, and while some proteins participate in signaling, regulating nerve impulses relies more on ions and neurotransmitters than on protein storage or primary function.