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Question

Given in the box are steps written randomly for the experiment to show that light is essential for photosynthesis.

Which of the following sequences of steps is to be followed for the successful run of the experiment?

A
(i), (iii), (ii), (iv), (v), (vi)
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B
(ii), (i), (v), (vi), (iii), (iv)
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C
(iii), (ii), (v), (i), (vi), (iv)
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D
(v), (ii), (i), (iii), (iv), (vi)
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Solution

The correct option is C (iii), (ii), (v), (i), (vi), (iv)
(iii) First of all, the plant is to be kept in a dark place to deprive it from using sunlight.
ii) The leaf to be tested should have a portion of itself covered on both sides with black paper strips. This is done to ensure that starch is not formed in that portion due to photosynthesis.
v)Then the plant is exposed to sunlight for occurrence of photosynthesis in the whpole leaf except for the covered part.
i) Then the leaf to be experimented is plucked.
vi) The black paper strips are then to be removed from the leaf under experimentation.
iv) Then is the leaf experimented for presence of starch.

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