Answer:
creatine kinase
Explanation:
Enzymes are biochemical catalysts which speed up various chemical reactions in the body. These enzymes are proteins. They work based on a lock and key model which enables them to fit only into specific substrates.
Creatine kinase, is an enzyme which is known to use adenosine diphosphate to create creatine and adenosine triphosphate.
Hence, by donating its phosphate molecule to adenosine diphosphate (ADP), creatine kinase helps restore creatine phosphate to its original.
