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Question 3

From Biology SL Paper 3 (November 2024, TZ2)

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  1. The diagram represents the pigment fractions in a thin layer chromatography of the alga Gambierdiscus toxicus.
Diagram showing the results of a thin layer chromatography experiment, with different pigment fractions (beta-carotene, chlorophyll a, dinoxanthin, diadinoxanthin, peridinin, chlorophyll c) separated based on their Rf values.
Diagram showing the results of a thin layer chromatography experiment, with different pigment fractions (beta-carotene, chlorophyll a, dinoxanthin, diadinoxanthin, peridinin, chlorophyll c) separated based on their Rf values.

(a) Identify the pigment that is most soluble in the solvent used in the chromatography. [1]

(b) Describe the process used to obtain this chromatogram. [3]

(c) State the equation used to obtain an Rf value. [1]

Textbook topics in this question

Review the exact course sections assessed by each question part.

3(a)2.6 Photosynthesis, Light and Pigments
3(b)2.6 Photosynthesis, Light and Pigments
3(c)2.6 Photosynthesis, Light and Pigments