Multiple Choice
In human nutrition, what is the Acceptable Macronutrient Distribution Range (AMDR) for protein as a percentage of total daily energy intake for adults?
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1. Introduction to Biochemistry
Proteins
Multiple Choice
In human nutrition, how much metabolizable energy is typically attributed to 1 gram of dietary protein?
A
per gram
B
per gram
C
per gram
D
per gram
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, minus the energy lost in excretion.
Recall the general energy values attributed to macronutrients: carbohydrates provide about 4 kcal/g, fats provide about 9 kcal/g, and proteins provide about 4 kcal/g.
Recognize that although proteins contain roughly 4 kcal/g, not all of this energy is fully metabolizable due to energy lost during deamination and nitrogen excretion, but the standard accepted value remains approximately 4 kcal/g.
Compare the given options (9 kcal/g, 4 kcal/g, 2 kcal/g, 7 kcal/g) with the known standard values for metabolizable energy of proteins.
Conclude that the typical metabolizable energy attributed to 1 gram of dietary protein is 4 kcal/g, based on established nutritional biochemistry data.
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