Sept.11—Enzymes

Enzymes lower energy of activation

Enzymes affect only the rate of the reaction, not its probability of equilibrium point

Interaction of active site and reactant or substrate

Effect of substrate concentration, temperature, and pH on reaction rate

Competitive inhibition of reaction by another molecule,similar to normal reactant

Regulation

Enzyme either turned on or off by a molecule acting at allosteric site—ex. Feedback inhibition

Co-enzymes—non catalytic, non protein helpers of enzymes—ex. vitamins