Question

Enzymes are a __________, which speed up the rate of a reaction but are not used up or changed during the reaction. The enzyme lactase will speed up the reaction of braking down lactose.

Answer 1

are a biological or organic catalyst,usually proteinous in nature

Answer 2

Enzymes are a type of protein, which speed up the rate of a reaction but are not used up or changed during the reaction. The enzyme lactase will speed up the reaction of breaking down lactose.