5
Question Question 5
How will you show that chlorophyll is necessary for photosynthesis?
To show that chlorophyll is necessary for photosynthesis, we will conduct following experiment:
- Select a plant with variegated leaves. Chlorophyll is present in the green portion.
- Put the plant in sunlight for a few hours.
- Pluck any leaf and draw its rough outline indicating the green and non-green portions.
- put the leaf in dilute iodine solution.
We observe that the portion of leaf with chlorophyll turns blue-black showing the presence starch. This shows that photosynthesis took places only in the green part of leaf. Thus, chlorophyll is necessary for photosynthesis.