biology one mark question helpWatch
Phenolphthalein is an indicator that is pink in alkaline solutions.
When the pH drops below pH 8.3 phenolphthalein goes colourless. When phenolphthalein is added to milk it turns pink.
Suggest why, when lipase is added to a milk solution containing phenolphthalein, a colour change from pink to colourless is observed. (1 mark)