Question

Observe the graphs given below and choose the options correctly describing the color of Pigments 1, 2, and 3 in a chromatogram.

• A. Pigment 1: yellow green, Pigment 2: yellow-orange and Pigment 3: blue green
• B. Pigment 1: yellow - orange, Pigment 2: blue green and Pigment 3: yellow green
• C. Pigment 1: blue green, Pigment 2: yellow green and Pigment 3: yellow-orange
• D. Pigment 1: yellow green, Pigment 2: blue green and Pigment 3: yellow-orange

Answer 1

Answer: (A)

The above graph represents the absorption spectrum. It is a graph that depicts the absorption of various wavelengths of light by photosynthetic pigments. In this graph pigment, 1 is chlorophyll b, pigment 2 is carotenoids and pigment 3 is chlorophyll a. On separation of the leaf pigments of any green plant through paper chromatography we find that chlorophyll a appears bright or blue-green, chlorophyll b appears yellow-green, xanthophylls appear yellow and carotenoids appear yellow to yellow-orange.