Standard Science Primary 6 Energy

In an experiment, a plant was kept in a dark room for 48 hours. What was the most likely purpose of this action?

A To destarch the plant leaves.
B To prevent the plant from taking in water.
C To kill the pests on the leaves.
D To allow the plant to grow faster.
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Worked Solution

Step 1: Photosynthesis produces starch which is stored in leaves. Step [2-9]: In the dark, the plant cannot photosynthesize and uses up its stored starch. Step [2-9]: This "destarching" ensures any starch found after the experiment is newly made.

Correct answer: To destarch the plant leaves.

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