Question

question 13 (1 point)
which is the only amino acid whose α - carbon is not chiral?
lysine
alanine
valine
glycine
leucine

Explanation:

A chiral carbon has four different groups attached. Glycine's α - carbon has two hydrogen atoms (not four different groups), so it is not chiral. Other amino acids (Lysine, Alanine, Valine, Leucine) have α - carbons with four different groups (amino, carboxyl, hydrogen, and a distinct R - group), making them chiral.

Answer:

Glycine