Cambridge AS & A Level Biology
13.1Photosynthesis as an energy transfer process
Photosynthesis as an energy transfer process in Cambridge AS & A Level Biology: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic56 practice questions3 lessons
Learning objectives
What the syllabus expects you to be able to do.
- 13.1.1Relate chloroplast structure, from diagrams and electron micrographs, to function.
- 13.1.2Explain that ATP and reduced NADP from the light-dependent stage drive the Calvin cycle.
- 13.1.3State that thylakoids are the site of the light-dependent stage and the stroma of the light-independent stage.
- 13.1.4Describe the roles of chlorophyll a, chlorophyll b, carotene and xanthophyll in light absorption.
- 13.1.5Interpret absorption and action spectra.
- 13.1.6Use chromatography and Rf values to separate and identify chloroplast pigments.
- 13.1.7State that cyclic and non-cyclic photophosphorylation occur in the light-dependent stage.
- 13.1.8Explain cyclic photophosphorylation (PSI only, photoactivation, ATP).
- 13.1.9Explain non-cyclic photophosphorylation (PSI and PSII, photolysis of water, ATP and reduced NADP).
- 13.1.10Explain electron transport, proton pumping and chemiosmosis across the thylakoid membrane.
- 13.1.11Outline the three stages of the Calvin cycle: fixation by rubisco, reduction of GP to TP, regeneration of RuBP.
- 13.1.12State that GP is used for some amino acids and TP for carbohydrates, lipids and amino acids.
Lessons
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Chloroplast structure and photosynthetic pigments
40 min
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The Calvin cycle and C4 plants
45 min
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The light-dependent stage of photosynthesis
45 min
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Sample question
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