Question

which macronutrient is the most energy - dense, with its caloric value being nine calories per gram?
a. protein
b. vitamins
c. fats
d. carbohydrates

Explanation:

To determine the most energy - dense macronutrient with 9 calories per gram, we analyze each option:

• Option A: Protein provides about 4 calories per gram, so it is not the most energy - dense.
• Option B: Vitamins are not macronutrients (macronutrients are carbohydrates, proteins, and fats that are needed in large amounts), and they do not provide 9 calories per gram.
• Option C: Fats are macronutrients and they provide 9 calories per gram, which is higher than the caloric value of proteins and carbohydrates.
• Option D: Carbohydrates provide about 4 calories per gram, so they are not the most energy - dense.

Answer:

C. Fats