O-LevelBiologyPlant Nutrition5090/12 · Oct/Nov 2015 · Q61 Mark
A variegated plant is destarched and then placed in the sunlight for several hours. A leaf is then taken and tested for starch using iodine solution. Which diagram shows the correct results?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
ALeaf showing inner green and outer white regions before test, and inner black and outer brown regions after test.
BLeaf showing inner green and outer white regions before test, and inner brown and outer black regions after test.
CLeaf showing inner green and outer white regions before test, and inner brown and outer black regions after test.
DLeaf showing inner green and outer white regions before test, and inner green and outer white regions after test.
✓ Correct answer
C: Leaf showing inner green and outer white regions before test, and inner brown and outer black regions after test.
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