Question

What does an enzyme do in a chemical reaction?

Answer 1

$\huge\mathfrak\red{Hey\:Mate}$

Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy. Many enzymes change shape when substrates bind.

Answer 2

$\huge\mathfrak\red{heya\:Mate}$

it act as catalyst that make digestion faster than usual.