Which one of the following statements is not correct?

Options

A. Proteins are polyamides formed from amino acids.
B. Except glycine, all other amino acids show optical activity.
C. Natural proteins are made up of `L-` isomers of amino acids
D. `-NH_(2)` and -COOH groups are attached to different carbon atoms in `alpha-` amino acids.

Answer

D

Explanation

In `alpha-`amino acids, `-NH_(2)` and `-COOH` groups are attached to the same carbon atom.