1. what is a catayst?
- a substance that stops a reaction
- a substance that increases the speed of a reaction
- a substance that decreases the speed of a reaction
- a substance that causes a reaction
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2. what happens to a substrate molecule in a reaction?
- it changes
- it stays the same
- it disappears
- it multiplies
3. What is the active site?
- where product joins the enzyme
- where the substrate joins to the enzyme
- where the enyme joins the lipid
- the solution in which it is in
4. what happens when the temperature goes above the optimum temperaure?
- the rate is slower
- it denatures
- the rate is faster
- it works better
5. what is an enyme?
- biological catalysts produced by living things
- a carbohydrate
- man made catalyst
- a lipid