Question

Variegated leaf with green and yellow patches in used for an experiment to prove that chloeophyll is required for photosynthesis. Before the experiment the green portion (a) and the pale yellow portions

Answer 1

Pigments absorb light used in photosynthesis. For instance, plants appear green to us because they contain many chlorophyll a and b molecules, which reflect green light. Most photosynthetic organisms have a variety of different pigments, so they can absorb energy from a wide range of wavelengths.

Answer 2

Just before Starch test – Pale yellow

Just after Starch test – Blue black

6CO2 + 6H2O ------>C6H12O6 + 6O2

O2 is obtained from water (H2O), as splitting of water results in formation of Hydrogen

(used for making glucose) and oxygen (by-product).

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