Answer:
It is unchanged and can be used again for the same chemical reaction.
Explanation:
Enzymes are bio-catalysts which speed up the rate of chemical reactions by lowering the activation energy for the reaction and producing binding energy. But during chemical reaction the enzymes are unchanged and can be reused for the same chemical reaction. Most of the enzymes are proteins and without enzymes a biochemical reaction cannot take place.
For example: Amylase catalyzes the conversion of starch into sugar.
