Question

question 14 which of the following is true regarding protein as an energy source? protein is the best energy source for sprinting. protein is the primary energy source for anaerobic activity. protein is not a good energy source. protein is the best energy source for walking.

Explanation:

• For sprinting (anaerobic, short - burst), carbohydrates (like glycogen) are the best energy source, not protein. So the option "Protein is the best energy source for sprinting" is wrong.
• Anaerobic activity mainly relies on carbohydrates (through glycolysis) for energy. Protein is not the primary energy source for anaerobic activity, so the option "Protein is the primary energy source for anaerobic activity" is wrong.
• Protein's main roles are in building and repairing tissues, enzyme and hormone production, etc. Using protein for energy is inefficient and not its main function, so "Protein is not a good energy source" is correct.
• Walking is a low - intensity aerobic activity, and the main energy source is fat (and also carbohydrates), not protein. So the option "Protein is the best energy source for walking" is wrong.

Answer:

C. Protein is not a good energy source.