International A Level Biology / Coordination in animals and plants
Core practical 18: amylase production in germinating cereal grains
Edexcel International A Level Biology (YBI11), chapter 24: Coordination in animals and plants, specification point 8.12. Part of the full course.
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This practical tests how germinating barley grains produce amylase, using starch agar and iodine to show where starch has been broken down. The results show how gibberellin from the embryo switches on amylase production in the aleurone layer.