How many calories per gram do carbohydrates, protein, fat, and alcohol provide?

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Multiple Choice

How many calories per gram do carbohydrates, protein, fat, and alcohol provide?

Explanation:
Energy content per gram differs among macronutrients. Carbohydrates and protein provide about 4 kilocalories per gram, fat provides about 9 kilocalories per gram, and ethanol (alcohol) provides about 7 kilocalories per gram. These values come from the amount of energy released when each is metabolized; fat has the highest energy density due to its large number of carbon-hydrogen bonds, while carbohydrates and protein give less energy per gram, and alcohol provides energy despite not being a nutrient. Therefore, the combination reflects the standard energy densities: 4 for carbohydrate, 4 for protein, 9 for fat, and 7 for alcohol.

Energy content per gram differs among macronutrients. Carbohydrates and protein provide about 4 kilocalories per gram, fat provides about 9 kilocalories per gram, and ethanol (alcohol) provides about 7 kilocalories per gram. These values come from the amount of energy released when each is metabolized; fat has the highest energy density due to its large number of carbon-hydrogen bonds, while carbohydrates and protein give less energy per gram, and alcohol provides energy despite not being a nutrient. Therefore, the combination reflects the standard energy densities: 4 for carbohydrate, 4 for protein, 9 for fat, and 7 for alcohol.

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