Which of the Following Statements Is NOT True of the Amino

Multiple Choice

Which of the following statements is NOT true of the amino acids?

A) The R group of amino acids differs from one amino acid to another.
B) There are more than 60 different kinds of amino acids present in cells.
C) Amino acids have an N- terminus, C- terminus, and R groups.
D) All amino acids exist in two stereoisomeric forms.
E) Only around 20 amino acids are used in protein synthesis.