Amino acids are molecules which contain both an amino group and a carboxyl group. Proteins are made up of a-amino acids which, except for proline, have the general formula NH2-CHR-COOH where the R group determines the identity of the amino acid. With the exception of proline, which of the following is true of the amino group in a-amino acids?

A) It is always 1°.
B) It is always 2°.
C) It is always 3°.
D) It is 1°, 2° or 3° depending on the identity of R.


A

Environmental & Atmospheric Sciences

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