Which of the following enzymes is classified as a transferase?

The enzyme classified as a transferase is creatine kinase. Transferases are a group of enzymes that facilitate the transfer of a functional group from one molecule to another. Creatine kinase specifically catalyzes the transfer of a phosphate group from phosphocreatine to adenosine diphosphate (ADP) to form adenosine triphosphate (ATP) and creatine. This reaction is vital in energy metabolism, particularly in muscle tissue during exercise.

In contrast, amylase functions as a hydrolase, breaking down starches into sugars by adding water to the bonds. Lactate dehydrogenase is classified as an oxidoreductase; it catalyzes the conversion of lactate to pyruvate, facilitating the interconversion of these two molecules in metabolic pathways. Carbonic anhydrase, on the other hand, acts as a hydrolase, catalyzing the reversible reaction between carbon dioxide and water to form carbonic acid. This reaction plays a critical role in maintaining acid-base balance in the body.

Focusing on the role of creatine kinase in catalyzing the transfer of phosphate groups reinforces the understanding of enzymatic classifications and functions in biochemical processes.