A variegated leaf with green and yellow patches in used for an experiment to prove that chlorophyll is required forphotosynthesis. Before the experiment the green portions (A), and the pale yellow portions (B), are observed. Whatwill be the colour of ‘A’ just before and after the starch test? Also write the equation of photosynthesis and mark, as well as validate from which molecule the by-product is obtained.
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colour of A before experiment=green
colour of A after experiment=blue
the green portion of leaf contains chlorophyll which synthesises starch in plants and after starch test starch gives deep blue/black colour
colour of A after experiment=blue
the green portion of leaf contains chlorophyll which synthesises starch in plants and after starch test starch gives deep blue/black colour
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The colour of A, i.e. the green area before the starch test is conducted will be pale yellow because chlorophyll is needed to be taken out before doing the starch test and after the starch test, the colour changes to blue-black due to the reaction of starch and iodine that is there in A.
The photosynthesis equation can be provided here as - 6CO2 + 6H2O + Light energy = C6H12O6 + 6O2
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