-carbon hydrogen would result in a D-amino acid. Gly itself, is neither L- nor D- because its -carbon is not chiral.See the explanation of L- and D- isomers at question #15.
11. Poor glycine---the only amino acid without a side-chain! Which hydrogen of Gly is substituted with an R-group in the other L-amino acids?
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Incorrect
Comment: R-group substitution at the other -carbon hydrogen would result in a D-amino acid. Gly itself, is neither L- nor D- because its -carbon is not chiral.
See the explanation of L- and D- isomers at question #15.