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Of the twenty standard amino acids, how many must humans get from food?

ATwelve
BSix
CThree
DNine
Answer & Solution
Correct answer: D. Nine
1. The question asks about: Of the twenty standard amino acids, how many must humans get from food? 2. Correct answer: Nine. Out of the twenty standard protein-producing amino acids, nine cannot be endogenously synthesized by humans... 3. Why the others fail: Only nine cannot be made by the body. _Source: Wikipedia, Nutrient, Amino acids_
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