Multiple Choice
Proteins perform many cellular functions, but not all cellular structures are made primarily of protein. Which structure is NOT made of protein?
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1. Introduction to Biochemistry
Proteins
Multiple Choice
Which range best reflects the Recommended Dietary Allowance (RDA) for protein intake in healthy adults?
A
g protein per kg body weight per day
B
g protein per kg body weight per day
C
g protein per kg body weight per day for all adults
D
g protein per kg body weight per day (approximately g/day for most women and g/day for most men)
Verified step by step guidance1
Understand that the Recommended Dietary Allowance (RDA) for protein is the average daily intake level sufficient to meet the nutrient requirements of nearly all (97-98%) healthy individuals in a particular life stage and gender group.
Recall that protein intake recommendations are typically expressed in grams of protein per kilogram of body weight per day (g/kg/day) to account for differences in body size.
Identify that the commonly accepted RDA for protein in healthy adults is approximately 0.8 g/kg/day, which balances the need for maintenance and repair of body tissues without excess.
Note that this value translates roughly to 46 grams of protein per day for an average woman and 56 grams per day for an average man, based on typical body weights.
Compare the given options to this standard: values significantly lower (0.2–0.3 g/kg/day) or higher (1.6–2.2 g/kg/day or 3.0 g/kg/day) do not align with the established RDA for healthy adults.
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