Question

beta - galactosidase is an enzyme that cleaves lactose into glucose and galactose. this is one of the many enzymes involved in the breakdown, or _, of lactose. catabolism anabolism

Explanation:

Catabolism is the breakdown of complex molecules into simpler ones. Anabolism is the synthesis of complex molecules from simpler ones. Since beta - galactosidase cleaves lactose (a complex molecule) into glucose and galactose (simpler molecules), it is catabolism.

Answer:

catabolism