Question

A variegated leaf with green and yellow patches in used for an experiment to prove that chlorophyll is required for

photosynthesis. Before the experiment the green portions (A), and the pale yellow portions (B), are observed. What

will 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.

Answer 1

Colour of A, before test it will be green and after test it will turn blue/black.

Equation of photosynthesis -
6 CO2 + 6 H2O / _SUNLIGHT __CHLOROPHYLL__gives__/ C6H12O6 + 6 02

By product oxygen is obtained from photolysis of water molecule, H2O.

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