Question

Which nutrient has the greatest number of calories?

a. protein
b. carbohydrate
c. vitamins
d. fats

Answer 1

The nutrient that has the greatest number of calories is d. fats. While all nutrients provide calories, fats contain more than twice the number of calories per gram than carbohydrates or proteins.

Answer 2

D. Fats

Explanation
Fats has more than twice as many calories per gram as carbohydrates and proteins. A gram of day has about 9 calories, while a gram of carbohydrate or protein has only about four calories.