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CAIE A-Level Biology A2 13.1.5 Absorption and Action Spectra Questions

Explain absorption and action spectra in photosynthesis using evidence from each question and mark scheme.

Syllabus
2028–2030
Course
Biology 9700
Level
A2

Exam points

  • Explain absorption and action spectra in photosynthesis.

CAIE A-Level Biology A2 13.1.5 Absorption and Action Spectra Questions question 1

[Maximum number: 4]

The absorption of different wavelengths of light by chloroplast pigments can be represented by an absorption spectrum.

Fig. 8.2 is an absorption spectrum of an extract of chloroplast pigments and an absorption spectrum of whole chloroplasts.

Fig. 8.2

Fig. 8.2

With reference to Fig. 8.2, describe the differences between the two spectra and suggest explanations for the differences.

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