Question

the main role of protein in the body includes
a to fight diseases
b to build and repair muscle tissue
c to quickly provide the body with energy
d to help nerves function

Explanation:

• Option A: Antibodies (a type of protein) fight diseases, but it's not the main general role of protein.
• Option B: Proteins are crucial for building and repairing muscle tissue (and other body tissues), which is a primary role.
• Option C: Carbohydrates are the main quick energy source, not proteins.
• Option D: Vitamins and minerals (like potassium, sodium) help nerve function, not the main role of protein.

Answer:

B. to build and repair muscle tissue