Compounds containing both amino and $-COOH$ groups are known as

At the isoelectric point,in which form does an amino acid exist?

Pepsin enzyme hydrolyses:

Denaturation of proteins leads to the loss of their biological activity due to:

Which of the following statements correctly describes the migration aptitude of aspartic acid during electrophoresis?
$(pK_1 = 2.0, pK_2 = 3.90, pK_3 = 10.0)$
$HOOC-CH_2-CH(NH_2)-COOH$

Which from the following is an essential amino acid?