Question : A variegated leaf with green and yellow patches is used for an experimentto prove thatchlorophyll is required for photosynthesis . Before theexperimentthe green portions (A) , and the pale yellow portions (B), are observed. What will be the colour of 'A' justbefore and afterthe starch test ? Also write the equation of photosynthesisand mark, as well as validate from which moleculethe by product is obtained .

Question : A variegated leaf with green and yellow patches is used for

1.	Question : A variegated leaf with green and yellow patches is used for an experimentto prove thatchlorophyll is required for photosynthesis . Before theexperimentthe green portions (A) , and the pale yellow portions (B), are observed. What will be the colour of 'A' justbefore and afterthe starch test ? Also write the equation of photosynthesisand mark, as well as validate from which moleculethe by product is obtained .
Answer» Solution : The GREEN portions (A) on the variegated leaves have chlorophyll. Just before the starch TEST, the leaf has been boiled and WASHED in alcohol and water. Hence it will be pale yellow . Justafter the starch test, it will be blue-black, indicatingpresence of starch. Reaction : `O_(2) and H_(2) O`are RELEASED as by-products from splitting of water.