Multiple Choice
In human nutrition, what best defines an incomplete protein?
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1. Introduction to Biochemistry
Proteins
Multiple Choice
In human nutrition, approximately how much metabolizable energy does 1 gram of dietary protein provide?
A
9 kcal
B
2 kcal
C
4 kcal
D
7 kcal
Verified step by step guidance1
Understand that metabolizable energy refers to the amount of energy available to the body from a nutrient after digestion and absorption.
Recall the general energy values for macronutrients: carbohydrates and proteins typically provide about 4 kcal per gram, while fats provide about 9 kcal per gram.
Recognize that dietary protein, once metabolized, yields approximately 4 kcal of energy per gram.
Note that the other values (2 kcal, 7 kcal, 9 kcal) correspond to either incorrect estimates or other macronutrients (e.g., 9 kcal for fats).
Conclude that the metabolizable energy from 1 gram of dietary protein is approximately 4 kcal.
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