A Level Biology Revision Lesson 211:

An Overview of Photosynthesis.

Task 1. Check Where this Lesson fits into your Exam Specification!

Task 2. Watch the Revision Lessons in Full.

Task 3: Download and complete the accompanying work booklet and revision notes.


Check Your Spec!

★ AQA A Level Biology Specification Reference: - 3.5.1 Photosynthesis (A-level only)


★ CIE A Level Biology Specification Reference: - 13.1 Photosynthesis as an energy transfer process.


★ Edexcel A Level Biology (Biology A – Salters-Nuffield) Specification Reference: - Topic 5: On the Wild Side: This topic builds an appreciation that photosynthesis is the primary process that underpins the majority of ecosystems. 5.9 Understand the structure of chloroplasts in relation to their role in photosynthesis.

★ Edexcel A Level Biology (Biology B) Specification Reference: - Topic 5: Energy for Biological Processes. 5.7 Photosynthesis: i Know the structure of chloroplasts, including: envelope, stroma, grana and lamellar structure.

★ OCR A Level Biology (Biology A) Specification Reference: - 5.2 Energy for biological processes. 5.2.1 Photosynthesis: (b) the structure of a chloroplast and the sites of the two main stages of photosynthesis. The components of a chloroplast including outer membrane, lamellae, grana, thylakoid, stroma and DNA. (c) (i) the importance of photosynthetic pigments in photosynthesis. To include reference to light harvesting systems and photosystems. (d) the light-dependent stage of photosynthesis.

★ OCR A Level Biology (Biology B) Specification Reference: - Module 4: Energy, reproduction and populations: 4.3 Photosynthesis, food production and populations - 4.3.1 Photosynthesis, food production and management of the environment : (a) (i) the ultrastructure of the chloroplast - To include the location of the components for the light-dependent reaction in the thylakoid membranes (light harvesting complexes, photosystems, electron transport chain and ATP synthase) and the location of the enzymes for the light-independent reactions in the stroma. (b) the process of the light-dependent stage of photosynthesis. To include the transfer of light energy to chemical energy in the form of ATP and reduced NADP (details of cyclic and non-cyclic photophosphorylation are not required).


★ WJEC A Level Biology Specification Reference: - Energy for Life: 2. Photosynthesis uses light energy to synthesise organic molecules. Learners should be able to demonstrate and apply their knowledge and understanding of: (a) the distribution of chloroplasts in relation to light trapping (b) chloroplasts acting as transducers converting the energy of light photons into the chemical energy of ATP. (c) the process of light harvesting and the absorption of various wavelengths of light by chlorophyll and associated pigments and the energy transfer to reaction centres. (d) the basic features of Photosystems I and II.

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