Covalent Modification Is One Way the Activity of Specific Enzymes $\alpha$

Multiple Choice

Covalent modification is one way the activity of specific enzymes can be regulated. Which enzyme is NOT regulated in this way?

A) phosphofructokinase-2
B) $\alpha$ -ketoglutarate dehydrogenase
C) pyruvate dehydrogenase
D) phosphorylase kinase
E) All of these enzymes are regulated by covalent modification.