Enzymes Flashcards
(7 cards)
Lock and key vs induced fit
Substrate is not perfect fit but shape of active site slightly changes to accodmodate the substrate
What does an enzyme do to a reaction
Lowers there activation energy
Factors affecting rate of enzyme catalysed reactions
Temperature pH Enzyme concentration Substrate concentration The presence of inhibitors
What is an inhibitor
A substance that reduces the rate of an enzyme-catalysed reaction
Competitive and reversible inhibitors
Permanent- effects are irreversible
Reversible- temporary
Competitive Inhibitors
These are molecules which are similar shape to substrate and fit into active site preventing substrate from entering
Non-competitive
Not shaped like substrate, instead bind to another part of the of enzyme which alters the active sites shape so substrate cannot bind