enzymes

living things produce enzymes that act as biological catalysts

enzymes reduce the need for high temperatures and we only have enzymes to speed up the useful chemical reactions in the body

a catalyst is a substance which increases the speed of a reaction without being changed or used up in a reaction

enzymes have active sites that need a substrate to fit in it to work

if the substrate doesnt match the enzymes active site then the reaction wont be catalysed

temp:

a higher temp increases the rate of reaction 

the higher the temp collisions are more frequent so more substrates fit into enzymes active sites and the rate of reaction therefore increases

if it gets too hot the bonds holding the enzyme together break and changes the shape of the enzyme's active site and the substrate no longer its

the enzyme is denatured

enzymes optimum temp is around 37 degrees

if a pH is too high or low it interferes with the bonds in an enzyme and this denatures the enzyme

the optimum pH is different for different enzymes depending on where they work

investigating enzymatic reactions:

how to investigate how pH affects amylase activity:

1. put a drop of iodine solution into every well of a spotting tile

2. place a bunsen burner on a heat proof mat and…