Summary for chapter 5.5

Enzymes are Proteins that speed up specific reactions in cells

Enzymes and Activation energy
Activation energy is a start energy level to start chemical reaction. To provide activation energy level, is to heat up the reactants because hotter molecules can collide with enough energy to weaken bonds.
Another way to reach activation energy level, is to depend on catalyst, burn compounds that speed up the chemical reactions. One of the special catalysts are called enzymes.
Enzymes help reactants to have chemical reaction at it's normal temperature.

How enzymes work
Enzymes also depends on the substance called substrate. It fits into a particular region of the enzyme, called the activate site. It weakons bonds and help to break a bond and have a chemical reaction. Another way is that enzymes can lower the activation energy but accepting two reactant molecules.

1. Activation level is a level that chemical reaction can start and enzymes helps to start chemical reaction by raising activation level.