Question

Select the true statements.
Chicken and beans are protein sources.
Proteins are the primary energy source for cells.
Proteins are found only in animals.
Proteins help muscles contract.

Answer 1

True:
- Chicken and beans are protein sources.
- Proteins help muscles contract (e.g., actin and myosin).

False:
- Proteins are the primary energy source for cells. (Carbohydrates and fats are primary energy sources; proteins are used for energy only when needed.)
- Proteins are found only in animals. (Proteins occur in plants, bacteria, fungi and all living organisms.)