During the starch testing procedure, a leaf is first placed in boiling water and then in ethanol. What is the primary purpose of these two steps in sequence?
To kill the leaf cells and then remove the green pigment chlorophyll
2 )
To soften the leaf tissue and then extract the starch granules
3 )
To sterilize the leaf surface and then dissolve the cell membranes
4 )
To activate the starch grains and then concentrate them for detection
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