Photosynthesis Exam-Style Questions Answers
1. Complete the word equation for photosynthesis:
carbon dioxide + water
glucose + oxygen
What type of energy is transferred in photosynthesis? light energy
What is the source of this energy? the sun
A student places a plant into a dark cupboard and partially covers one leaf (leaf A) with a piece of
card. After two days, she carries out a test for starch on leaf A and on one other leaf (leaf B), as
shown below.
leaf A
leaf B
When iodine is added to leaf B, it turns completely blue/black.
2. Which parts of leaf A would turn blue/black?
Shade these areas on the leaf below and explain your answer.
The card stops the light from getting to the leaf and
therefore the leaf cannot photosynthesise. This means only
the uncovered areas will contain starch and will therefore
turn blue/black.