Can someone help me, im revising for my science GCSE and im kinda stuck on this question.Question;Using the headings below explain in detail how you could use a variegated leaf to show that chlorophyll is needed for photosynthesis.Carrying out the experimentAnalysing the resultsThank you.Please do not use big fancy science language, im only 15 :)
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You could prove that only green parts of the variegated leaf will be able to produce starch, while the white parts don'tFirst, take a plant with variegated leavesCover a couple of leaves with aluminum foil, in which you have cut out some small holes to expose some white and green areasLeave the plant in the sun for 48 hoursWater if necessaryThen, cut out sections of the leaves that are green and covered, green and exposed, white and covered, white and exposed (4 different sets of small pieces) Boil the leaf pieces in alcohol and stain with iodine, to show which parts have formed starchNote that boiling leaves in ethanol should not be done on open fire, but rather by using electrical heaters, and boiling the leaf pieces in a tube with ethanol that is placed in a tube or beaker of boiling waterThis part of the experiment should not be done without supervision by an experienced adult (such as a biology teacher)So I hope you only need to describe the experiment, not do it yourselfPlease do not do this experiment at homeBelow are some more detailed instructionsBasicly, the iodine will color the leaf pieces in which starch was developed (the sun-exposed green parts).
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