Food Tests, GCSE biology

Benedict’s

reducing sugars

iodine

starch

biuret

protein

ethanol

fat

blue

what colour is Benedict’s originally

brick red

what colour does Benedict’s turn in the presence of reducing sugars

yellow-brown

what colour is iodine originally

blue-black

what colour does iodine turn in the presence of starch

blue

what colour is Biuret originally

lilac

what colour does Biuret turn in the presence of proteins

colourless

what colour is ethanol originally

white emulsion

what is produced in the presence of fats

DCPIP

vitamin c

blue

what colour is DCPIP originally

colourless

what colour does DCPIP become in the presence of vitamin c