A catalyst speeds up the rate of reaction with ought being consumed.
What are enzymes?
Protein catalysts that permit low temperature reactions by reducing activation energy.
What are the parts of an enzyme?
Active site: where the substrate binds to the enzyme to either have bonds made or destroyed.
Substrate: which is the substance that has bonds made or destroyed by the enzyme.
induced fit model: the model that states enzymes physically change shape to fit a protein into its active site.
What is a Cofactor?
Inorganic molecules that bind to the enzyme to "wake it up" so it can do its job.
What is a Coenzyme?
Organic molecules. it binds to the active site to help make a more snug fit for the substrate.
What is enzyme activity affected by?
PH.
Substrate concentration.
Enzyme concentration.
Temperature.
Competitive inhibitors.
Why is PH a factor that affects Enzymes?
Different Enzymes work best at certain PHs. If they are removed from this PH they are denatured.
How does Substrate concentration affect Enzymes?
The more substrate the more chance of them bumping into enzymes and getting bonds broken/formed.
How does temperature affect enzyme activity.
At high temperatures molecules are faster and have more energy which means they have a higher chance of bumping into an enzyme. Rate of reaction is increased.
What are competitor inhibitors?
Substances that replicate the substrate and get stuck in the active site but are not meant to be there and enzymes cannot make/break bonds.
What is Feedback Inhibition?
When there is to much of a substance and the body doesn't need much of it anymore.