Edexcel IGCSE Biology · Spec 2.23
Photosynthesis Starch Required Practicals
Covers test a leaf for starch safely, Investigate the need for light and carbon dioxide and Investigate the need for chlorophyll.
Biology revision video
Photosynthesis Starch Required Practicals
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Spec 2.23
What you need to know
- Test a leaf for starch safely
- Investigate the need for light and carbon dioxide
- Investigate the need for chlorophyll
Active recall
Quick check
Answer each question before opening the answer.
Why is the plant destarched first?
So any starch found was made during the investigation
Why is ethanol heated in a water bath?
Ethanol is flammable and must be kept away from a direct flame
What result shows chlorophyll is required?
Only the areas that were green turn blue-black with iodine
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