Why Boil a Leaf for Starch Test?


You boil a leaf for a starch test to in order to make the leaf more absorptive to the iodine test. The boiling disrupts the cell membranes and cells walls which make it easy to react to the starch.
Q&A Related to "Why Boil a Leaf for Starch Test"
It is to kill the cytoplasm, denaturate the enzyme and makes the leaf become more permeable to the iodine solution, therefor, we have to boil a leaf for starch test.
In the leaf, excess glucose is rapidly converted to starch, so we test leaves for starch to show that photosynthesis has happened, rather than testing for glucose. Source(s) http:
Variegated leaves have areas that are white in color instead of being green. This is due to a lack of plastids that contain chlorophyll; without chlorophyll photosynthesis cannot
This is because of the test for starch using Benedict's solution looking for the colour change.
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