Answer:
B. An essential nutrient that makes up more than 50 percent of your body weight, important for growth, building and maintaining muscles, and supplying the body with energy, among other things.
Explanation:
Protein is the most important of biological macromolecules, making up more than half the dry weight of a cell. It is present in every living being and has the most varied functions. Proteins may act as enzymes, catalyzing chemical reactions, may carry small molecules or ions; may be motor to assist movement in cells and tissues; participate in gene regulation, and is an essential nutrient that makes up more than 50% of body weight, important for the growth, building and maintenance of muscles and energy supply to the body, among other things.
