Final answer:
The primary function of protein is to build and repair body tissues. Proteins are critical for various cell functions, tissue growth, and repair, as well as playing roles in immunity, hormone formation, and enzymatic reactions. They are not primarily used for energy, which is instead provided by carbohydrates and fats. Therefore , the correct answer options is a)
Step-by-step explanation:
The Primary Function of Protein
The primary function of protein is to build and repair body tissues. Proteins are essential macromolecules and form the building blocks of the human body. They are involved in virtually all cell functions and are critical for the growth and repair of tissues. Not only do proteins contribute to the structure of cells and tissues such as muscles, hair, and skin, but they also have roles in the immune response, hormone production, and enzyme creation that drives numerous biochemical reactions.
While proteins are often associated with muscle development, their functions are far-reaching and include regulating body functions and transporting oxygen in the blood via hemoglobin. It's important to note that though proteins can be broken down for energy, if necessary, their primary role is not as an energy source; this function is reserved for carbohydrates and fats under normal circumstances.
Therefore, proteins are fundamental for maintaining the structure and function of our bodies, and any disruption in protein synthesis can have significant impacts on health.