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A lesson-by-lesson revision guide for AQA A-Level Biology (7402) Section 3.5 — glycolysis, the link reaction and Krebs cycle, oxidative phosphorylation, anaerobic respiration, the light-dependent and light-independent stages of photosynthesis, limiting factors, the RP7 and RP8 practicals, and the comparative anatomy of chloroplasts and mitochondria.

A complete exam-preparation guide for AQA A-Level Biology (7402): paper structure, the 25-mark Paper 3 essay, assessment objectives, command words, the 12 required practicals, mark-scheme patterns and a two-year revision strategy underpinned by retrieval-practice and spaced-repetition principles.

A topic-by-topic revision guide for AQA A-Level Biology (7402) exchange and transport — surface area to volume, gas exchange in single-celled organisms, insects, fish, plants and mammals, digestion, the mammalian heart, haemoglobin, blood vessels, xylem transpiration and phloem translocation.

A topic-by-topic revision guide for AQA A-Level Biology (7402) section 3.8 — transcription factors and gene regulation, epigenetics, stem cells, oncogenes and tumour suppressors, recombinant DNA, PCR, gel electrophoresis, genetic fingerprinting, gene therapy and the genome projects that underpin modern molecular medicine.

A lesson-by-lesson revision guide for AQA A-Level Biology (7402) Section 3.6 second half — homeostasis principles, the nephron and osmoregulation, blood-glucose regulation, thermoregulation in endotherms and ectotherms, hormonal control and second messengers, the menstrual cycle, liver detoxification and the RP5 kidney-dissection practical.

A lesson-by-lesson revision guide for AQA A-Level Biology (7402) Section 3.6 first half — neurone structure, the action potential and resting potential, synaptic transmission, sliding-filament muscle contraction, receptors and sensory transduction, reflex arcs, plant tropisms and the RP10 muscle-fatigue practical.

A lesson-by-lesson revision guide for AQA A-Level Biology (7402) Sections 3.7.2 and 3.7.3 — the chi-squared test, the Hardy-Weinberg principle, natural selection, genetic drift and gene flow, speciation, classification and taxonomy, molecular evidence for evolution and the fossil, biogeographic and comparative evidence.

A complete revision guide to AQA A-Level Physics Section 3.9 Astrophysics (Option A): refracting and reflecting telescopes, non-optical telescopes, magnitude and standard candles, stellar spectra, Stefan's and Wien's laws, the HR diagram, cosmological distance, the Doppler effect, Hubble's law, the Big Bang, and exoplanets, quasars, supernovae and black holes. Includes worked examples, exam strategy, and links to LearningBro's eight Astrophysics lessons.

A complete revision guide to AQA A-Level Physics Section 3.5: charge and current, potential difference and EMF, resistance and resistivity, I–V characteristics, series and parallel circuits, internal resistance, potential dividers, Kirchhoff's laws, and the resistivity and EMF required practicals.

Master AQA A-Level Physics Electronics (Option E) with this in-depth guide covering semiconductors, the p-n junction, transistors, op-amps, RC filters, logic gates, sequential logic, ADCs, and data communication.

Master AQA A-Level Physics Engineering Physics (Option C) with this in-depth guide covering rotational dynamics, angular momentum, the first and second laws of thermodynamics, indicator diagrams, Otto and Diesel cycles, Carnot efficiency, heat pumps, and refrigerators.

A complete exam-strategy guide to AQA A-Level Physics (7408): the three-paper structure, the 12 required practicals and CPAC, command words, calculation strategy, and a revision plan that uses spaced retrieval and interleaving to lock in marks across all 16 topics.