BI-921
Photosynthesis equation
Biology · Secondary 3 · Medium · Photosynthesis equation
A student tests a leaf for starch using iodine solution. Before the test, the leaf is boiled in water and then in alcohol. Why is the leaf boiled in alcohol?
- To kill all microorganisms on the leaf surface.
- To remove chlorophyll so the colour change with iodine is visible.
- To break down starch into glucose before adding iodine.
- To make the leaf waterproof so iodine does not soak in.
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