Coenzymes, Cofactors & Prosthetic Groups There are substances?other than?substrates and inhibitors that?interact?with?enzymes Some enzymes can only?function properly?if another?non-protein subs...
Enzyme Inhibitors Reversible inhibitors An enzyme's activity can be reduced or stopped,?temporarily, by a?reversible inhibitor There are?two types?of reversible inhibitors: Competitive?inhibitors h...
Enzyme Activity: Substrate Concentration The?greater?the?substrate concentration, the?higher?the?rate of reaction: As the number of substrate molecules increases, the likelihood of enzyme-substrate...
Enzyme Activity: Enzyme Concentration Enzyme concentration affects the rate of reaction The?higher?the?enzyme concentration?in a reaction mixture, the?greater the number of active sites?available a...
Enzyme Activity: Temperature Enzymes have a specific?optimum temperature This is the temperature at which they catalyse a reaction at the?maximum rate Lower temperatures?either?prevent?react...
Enzyme Activity: pH All enzymes have an?optimum pH?or a pH at which they operate best Enzymes are?denatured?at extremes of pH Hydrogen?and ionic bonds?hold the tertiary structure of the protein (ie...
CIE IGCSE Biology: 復習筆記：5.1.4 Enzymes & Temperature: Extended Enzymes & Temperature: Extended Enzymes are?proteins?and have a?specific shape, held in place by?bonds This is extremely i...
Mechanism of Enzyme Action Enzymes have an?active site?where?specific substrates bind?forming an?enzyme-substrate complex The?active site?of an enzyme has a?specific shape?to fit a?specific substra...
Enzymes as Catalysts Enzymes are?biological catalysts ‘Biological’ because they function in?living systems ‘Catalysts’ because they?speed up the rate of chemical reactions?without being?used up?or ...
