The addition of a phosphate group to a substrate is called ________.The enzyme that catalyzes this reaction is referred to as a ________.
A) proteolysis, phosphatase
B) phosphorylation, phosphatase
C) proteolysis, kinase
D) phosphorylation, kinase

Question

Quizplus · Accepted Answer

Phosphorylation is the addition of a phosphate group to a substrate, and the enzyme that catalyzes this reaction is a kinase. Option A is incorrect because proteolysis is the breakdown of proteins, not the addition of a phosphate group. Option B is incorrect because phosphatase is an enzyme that removes a phosphate group, not adds one. Option C is incorrect because proteolysis is the breakdown of proteins, and kinase is the enzyme that catalyzes the addition of a phosphate group, not proteolysis.

The Addition of a Phosphate Group to a Substrate Is