What are the steps involved to test that photosynthesis has taken place for std 7
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It is convenient to divide the photosynthetic process in plants into four stages, each occurring in a defined area of the chloroplast: (1) absorption of light, (2) electron transport leading to the reduction of NADP+ to NADPH, (3) generation of ATP, and (4) conversion of CO2 into carbohydrates (carbon fixation).
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Answer:Investigating photosynthesis – starch and chlorophyll
1. heat a plant leaf in boiling water for 30 seconds (this stops its chemical reactions)
2. heat it in boiling ethanol for a few minutes (this removes most of its colour)
3. wash with water and spread onto a white tile.
4. add iodine solution from a dropping pipette
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