4. All the following are
branched chain amino acids
except: *
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Answer:
The branched-chain amino acids (BCAAs) (leucine, isoleucine, and valine) are nutritionally essential in that they cannot be synthesized endogenously by humans and must be supplied by diet.
Explanation:
All are essential amino acids except
A. phenylalanine.
B. tryptophan.
C. valine.
D. asparagine.
Answer. D.
Solution. Asparagine (Asn) NH2COCH2-CH(+NH3)COO- is not an essential amino acid.
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