Which is not true about polymers ?

Options

A. a- carbon of a-amino acid is asymmetric
B. all proteins are found in L-form
C. human body can synthesize all proteins they need
D. at pH=7 both amino acids and carboxylic groups exist in the ionised form

Answer

B

Explanation

All proteins are not found in L-form but they may be present in form of D or L.