PLANT PHYSIOLOGY
PHOTOSYNTHESIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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To make the results reliable
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So that the plant would photosynthesise faster when returned to the light
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So that any starch already in the leaf was used up by the plant
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None of the above
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Detailed explanation-1: -A plant is destarched before performing any experiment in order to prevent photosynthesis. If starch is present is prevent it will be a hindrance in determining the correct pathway of photosynthesis which results in the formation of food.
Detailed explanation-2: -A plant is kept in the dark cupboard for about 48 hours before conducting any experiment on photosynthesis in order to remove starch from the leaves.
Detailed explanation-3: -Answer: As the leaves are covered in Aluminium, the plant will not receive sunlight for photosynthesis. Hence no Photosynthesis will occur in the leaves. No photosynthesis will occur so no glucose will be made and hence the plant would be food/energy deficient .
Detailed explanation-4: -The plant will die within a few hours as it cannot produce food without sunlight.
Detailed explanation-5: -Plants perform photosynthesis only in the presence of sunlight. A leaf kept in dark for a few days cannot perform photosynthesis and all the stored starch would have been used up by the leaf; no fresh starch would be present in the leaf.