CourseCourseConceptConceptDocsDocuments

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: 3]

Red algae are multicellular photosynthetic protoctists that contain phycoerythrin. Phycoerythrin is a photosynthetic pigment.

Question (a)

(a)

Fig. 4.1 shows:
- the absorption spectrum of phycoerythrin
- the action spectrum of red algae.

key ____ absorption spectrum of phycoerythrin ____ action spectrum of red algae

key ____ absorption spectrum of phycoerythrin ____ action spectrum of red algae

[ 3 ]

Question (i)

(i)

With reference to Fig. 4.1, state the wavelength of peak absorption by phycoerythrin.

[ 1 ]

Question (ii)

(ii)

Explain how the data in Fig. 4.1 show that phycoerythrin is not the only photosynthetic pigment in red algae.

[ 2 ]
All question bank results loaded