Multiple Choice
In human nutrition, how many kilocalories (kcal) are provided by consuming of protein?
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1. Introduction to Biochemistry
Proteins
Multiple Choice
In human nutrition, how many kilocalories (kcal) of metabolizable energy are provided by 1 gram of protein?
A
kcal per g
B
kcal per g
C
kcal per g
D
kcal per g
Verified step by step guidance1
Understand that metabolizable energy refers to the amount of energy available to the body after digestion and absorption of a nutrient.
Recall the standard energy values for macronutrients: carbohydrates and proteins typically provide about 4 kcal per gram, while fats provide about 9 kcal per gram.
Identify that the question asks specifically about protein, so focus on the energy yield from protein metabolism.
Use the known conversion factor that 1 gram of protein provides approximately 4 kilocalories of metabolizable energy.
Confirm that this value is widely accepted in nutritional biochemistry and is used to calculate dietary energy intake from protein.
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