1. Enzymes

2. Enzyme structure Enzymes are proteins found in cells
Like all proteins, they are made out of amino acids
The most important part of an enzyme is its ACTIVE SITE
The active site is the area where the substrate bonds
(A substrate is the stuff that is used in a reaction)

3. Enzymes turn substrates into products

4. Function of enzymes
A catalyst is anything that makes a reaction go faster
Heat is the best catalyst but it would kill our cells!
An enzyme is a catalyst made out of protein
When a chemical reaction is helped by an enzyme, the enzyme is not changed or used up. When the job is done, the enzyme will still be there, ready to be used again.

6. Enzymes are specific
Every enzyme can only be used for one reaction. Each one can only bond with one substrate
So every time you have a new substrate, you need a new enzyme
This is called being SUBSTRATE SPECIFIC
Animation

7. Discovery channel video
Review from EPS….. (or the video won’t make sense!)
Exergonic: a reaction that gives off energy
(the reactants have more energy in their bonds than the products)
Endergonic: a reaction that needs energy
(the reactants have less energy in their bonds than the products)
catalysts-video.htm

8. Breakers and builders
Some enzymes break down molecules into smaller pieces Like in digesting your food
Some enzymes create large molecules by joining smaller ones Like when you build muscle or a plant makes sugar

9. Name the parts:

10. Activity of enzymes
When an enzyme is doing its best job, that is called it’s optimum
Many things can affect how good an enzyme is at doing it’s job.
Heat (too much or too little)
pH and/or salts (interfere with the chemical bonds of the enzyme and change its shape)
Even things like enough vitamins and minerals in your diet (not enough makes enzymes work slower)
ons/Enzyme%20activity.html