Question #2eb1f

Enzyme decrease the activation energy needed to get a chemical reaction started.

Explanation:

The enzyme has a part called the active site where substrate molecules (reactants) fit. The reactants are held in a way which makes it easier to form new bonds or to break existing bonds.

![https://d2jmvrsizmvf4x.cloudfront.net/jVdBM4vsSuKNRbw7BhxO_enzyme_substrate_complex.jpg)

This video shows catalase enzyme (from liver) breaking down hydrogen peroxide.

This video shows how amylase enzyme (from saliva) breaks down starches.

Hope this helps!