| A destarched leaf on a potted plant was covered with black (A), white (B) and transparent (C) strips of paper as shown in the figure. |
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| After six hours of exposure to sunlight the leaf was removed from the plant and tested for starch. |
| Which one of the following will be the correct observation? |
| (a) Whole leaf turned blue black |
| (b) Only B and C portions turned blue-black. |
| (c) Only A and B portions remained colourless and the rest of the leaf turned blue-black. |
| (d) A, B and C portions remained colourless and the rest of the leaf turned blue-black. |
Answer:
(c) Only A and B portions remained colourless and the rest of the leaf turned blue-black.
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