Standard Science Primary 6 Energy

A plant was kept in a dark room for two days before an experiment on photosynthesis. What was the purpose of this step?

A To prevent the plant from growing too fast.
B To allow the plant to breathe more air.
C To ensure the plant has no starch left in its leaves.
D To help the plant absorb more water.
Show Worked Solution

Worked Solution

Step 1: Plants make sugar and store it as starch during photosynthesis. Step [2-9]: In the dark, the plant uses up its stored starch for energy. Step [2-9]: This "destarching" ensures any starch found later was made during the actual experiment.

Correct answer: To ensure the plant has no starch left in its leaves.

Want more questions like this? Superholic Lab has 10,000+ MOE-aligned questions with full worked solutions.

Start Free Trial — 7 Days Free