Pyruvate carboxylase belongs to which category of enzymes?

Explanation

Pyruvate carboxylase is classified as a ligase enzyme because it catalyzes the ATP-dependent carboxylation of pyruvate to form oxaloacetate, joining two molecules together. This reaction requires energy input, a characteristic feature of ligases. Other options like isomerases, lyases, and hydrolases catalyze different types of reactions that do not involve forming new bonds using ATP.