The side chain of the amino acid shown is classified as

Abasic
Bacidic
Cnonpolar
Dpolar uncharged

Answer: A

The side chain ends in a primary amino group, which accepts a proton at physiological pH and carries a positive charge, so it is basic. The amino acid is L-lysine.

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More questions on Amino acids from drawn structures: side chain, chirality, charge

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