What is the main function of protein in the body?

What is the main function of protein in the body?

• A. Provides energy to the body
• B. Builds bone and muscle structures, supports cell growth, hormones, blood, and enzymes
• C. Serves as the body's primary storage for vitamins
• D. Is the main source of quick energy during exercise

Answer: (B)

Proteins act as the body's building blocks and workhorses for growth, repair, and function. They form structural components in tissues such as muscles and the collagen framework in bone and connective tissue, supporting growth and maintenance. Beyond structure, proteins are essential for many critical roles: enzymes accelerate chemical reactions, hormones regulate bodily processes, blood components like hemoglobin transport oxygen, and antibodies defend against pathogens. Because of these diverse duties, the main function of protein is to build, repair, and regulate the body's tissues and systems. Energy needs are mainly met by carbohydrates and fats, while protein can be used for energy only if intake is insufficient.

Proteins act as the body's building blocks and workhorses for growth, repair, and function. They form structural components in tissues such as muscles and the collagen framework in bone and connective tissue, supporting growth and maintenance. Beyond structure, proteins are essential for many critical roles: enzymes accelerate chemical reactions, hormones regulate bodily processes, blood components like hemoglobin transport oxygen, and antibodies defend against pathogens. Because of these diverse duties, the main function of protein is to build, repair, and regulate the body's tissues and systems. Energy needs are mainly met by carbohydrates and fats, while protein can be used for energy only if intake is insufficient.