Ch 5 Enzymes

1: enzyme

1. substrate

2. substrate

3. active site

fatty acids

glycerol

lipase

fats

amylase and maltase

protease and catalase

protease and lipase

amylase and lipase

enzymes remain chemically unchanged at the end of the reaction

enzymes can be reused

enzymes speed up chemical reactions

enzymes are used up

each chemical reaction is catalysed by one unique enzyme

one enzyme can catalyse a large number of reactions

enzymes remain chemically unchanged

enzymes bind to substrates

the substrate is the lock and the enzyme is the key

the substrate is the key and the enzyme is the lock

the shape of the substrate is the same as that of the active site of the enzyme

the shape of the substrate is the complementary to that of the active site of the enzyme

changes in pH

changes in acidity

changes in alkalinity

changes in temperature

kinetic energy of molecules is low

kinetic energy of molecules is high

low rate of collision between enzyme and substrate molecules

high rate of collision between enzyme and substrate molecules