BiomoleculesHard

Question

Which statement correctly completes the statement?

Except for glycine, which is achiral, all the amino acids present in proteins $\_\_\_\_$

Options

A.are chiral, but racemic
B.have the L configuration at their $\alpha$ carbon
C.have the R configuration at their $\alpha$ carbon
D.have the S configuration at their $\alpha$ carbon

Solution

Amino acids which combine into peptide chains to form the building blocks of a rest array of proteins are all L -stereoisomers (left handed)

Glycine

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