Summary Mindmap on GCSE biology

speed up the reaction with
biological catalyst changed or used up

what are they & how do they they are large proteins made of chain of amin

work it has an active site with a unique shape com

it has an optimum
cause the enzyme
it needs right temp and pH
optimum pH is of



test for sugars

Benedict's test
presence = change from blue to green &
yellow & brick-red (depends)

test for starch

iodine solution
presence = brown orange to black & blue
food test black

test for proteins
Biuret test
presence - blue to purple
biology revision - test for lipids
Enzymes sudan III test
presence = separated layers with top
layers bright red




starch - maltose - via a




proteins - amino acids
break down of big molecules
in