There are many different types of lipase in the human body. Why does each different type of lipase act on only one specific type of lipid molecule?
[1 mark]
Students investigated the presence of starch and glucose in the leaves of
geranium plants.
This is the method used.
1. Place two identical geranium plants on a bench near a sunny window for two days.
2. After two days:
leave one plant near the window for two more days.
place one plant in a cupboard with no light for two more days.
.
3. Remove one leaf from each plant.
4. Crush each leaf to extract the liquid from the cells.
5. Test the liquid from each leaf for glucose and for starch.

Describe how the students would find out if the liquid from the leaf contained glucose.
[3 marks]

Describe how the students would find out if the liquid from the leaf contained starch.
[2 marks]