एक्टिविटी टू शो क्लोरोफिल इज नेसेसरी फॉर फोटोसिंथेसिस
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Answer:
Procedure for the experiments:-
A variegated leaf plant is taken for this particular experiment to prove the necessity of chlorophyll for photosynthesis. A variegated leaf is a leaf in which different patches of colors are present in a Croton or Coleus or Geranium plant. The place where green patches are present in the leaf, chlorophyll pigment is present while at the other color patches present in the leaf contain other pigments but not chlorophyll. Before starting the experiment to prove chlorophyll is necessary for photosynthesis an important step has to be carried out is known as De-starching. De-starching is a step in which the starch present in the leaves of the plant will be removed by keeping the variegated leaves plant in a dark room or closed cup-board for about 48 hours. This step is done to ensure that previously synthesized starch in the leaves get consumed up because photosynthesis doesn't occur at that time as the plant is kept in dark place.
After De-starching step the variegated leaf plant is kept in bright sunlight for about 6 hours. After this one of the variegated leaf is plucked out from the experimental plant. Then Iodine test is conducted for this experimental leaf to fin
Ans. A leaf with different colored patches as in Croton leaf is known as variegated
Ans. A variegated leaf include different patches of colors like green, yellow, white, brown etc. A green patch in the leaf include chlorophyll while other colored patches in the leaf include other colored pigments other than chlorophyll. But green patches in the leaf only prepare starch as it contain chlorophyll but the other patches cannot prepare starch since they lack chlorophyll.
Before starting of the experiment what important step you carry out? Explain this step and give its importance.
Ans. Before starting of this experiment De-starching of the leaves of the plant has to carried out. De-starching the leaves of the variegated leaf plant can be done by keeping the plant in a dark room for about 48 hours. This step will be carried out to ensure that there would be no starch in the leaves of the experimental plant.
Here is an experiment to prove Co2 is necessary for photosynthesis
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