pptx, 1.52 MB
pptx, 1.52 MB
docx, 278.48 KB
docx, 278.48 KB

This detailed lesson describes each of the 4 stages of aerobic respiration and explains how this cellular reaction yields ATP and generates heat. The engaging PowerPoint and accompanying resource have been designed to cover points 5.1 (i) and (ii) of the Edexcel A-level Biology B specificaiton and acts as a clear introduction for the upcoming lessons where the finer details of glycolysis, the Link reaction and Krebs cycle and oxidative phosphorylation are described

The lesson begins with an introduction to glycolysis and students will learn how this first stage of aerobic respiration is also the first stage when oxygen is not present. This stage involves 10 reactions and an opportunity is taken to explain how each of these reactions is catalysed by a different, specific intracellular enzyme. A version of “GUESS WHO” challenges students to use a series of structural clues to whittle the 6 organelles down to just the mitochondrion so that they can learn how the other three stages take place inside this organelle. Moving forwards, the key components of the organelle are identified on a diagram. Students are introduced to the stages of respiration so that they can make a link to the parts of the cell and the mitochondria where each stage occurs. Students will learn that the presence of decarboxylase and dehydrogenase enzymes in the matrix along with coenzymes and oxaloacetate allows the link reaction and the Krebs cycle to run and that these stages produce the waste product of carbon dioxide. Finally, time is taken to introduce the electron transport chain and the enzyme, ATP synthase, so that students can begin to understand how the flow of protons across the inner membrane results in the production of ATP and the the formation of water when oxygen acts as the final electron acceptor.

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Topic 5: Energy for biological processes (Edexcel A-level Biology B)

Respiration and photosynthesis are two of the most important biological processes, which can be poorly understood by students but unsurprisingly are commonly assessed in the terminal exams. These 11 lessons have been intricately planned so that they contain a wide range of activities that will engage the students whilst covering the key detail to try to deepen their understanding and include exam-style questions so they are prepared for the assessments. The following specification points in topic 5 of the Edexcel A-level Biology B course are covered by these 11 fully-resourced lessons: * Cellular respiration yields ATP * The different stages of aerobic respiration * The conversion of glucose to pyruvate during glycolysis * The mitochondrial matrix as the site of the Link reaction and Krebs cycle * The production of carbon dioxide, reduced NAD and ATP in the Krebs cycle * Oxidative phosphorylation * The yield of ATP from anaerobic respiration * The production of lactate in mammalian muscles * Ethanol formation in plants * The meaning of the absorption and action spectra * The reason for a variety of photosynthetic pigments in plants * The structure of the chloroplasts * The role of thylakoid membranes in the light-dependent stage * The process of cyclic and non-cyclic photophosphorylation * The use of reduced NADP and ATP in the Calvin cycle * Understand how GALP is used as a raw material in the production of monosaccharides, amino acids and other molecules * Factors that limit photosynthesis including carbon dioxide, light intensity and temperature Due to the detail of these lessons, it is estimated that it will take in excess of a month of A-level lessons to cover these lessons If you would like to sample the quality of the lessons, download the link reaction, Krebs cycle and light-independent stage lessons as these have been shared for free

£19.50

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