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Amino acids: zwitterions, isoelectric point
NEET level
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bm186
Which of the following is an essential amino acid?
A
Glycine
B
Alanine
C
Glutamic acid
D
Valine
Answer: D
Valine cannot be synthesised by the body and must come from the diet. Glycine, alanine and glutamic acid are non-essential.
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