A planning, learning & revision system for AQA A-Level Biology
Carefully mapped video lessons, practice tests & progress tracker for year 1 and year 2,
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Year 12 - DNA replication
Year 1/AS whole topic videos available on our YouTube channel
Year 13 - Respiration overview
Year 2/A2 lessons, practice questions, planning guides & whole-topic videos all exclusively here on the website
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Year 12 A level Biology Free whole topic revision videos
See the whole topic revision videos on youtube
Unit 1: Biological molecules
Condensation and hydrolysis reactions explained (carbohydrates, lipids, & proteins).​
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Structure and function of starch, cellulose, and glycogen, simple and concise.​
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Lipid and phospholipid structure and the detailed structure of proteins explained visually​
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Enzyme structure and function, explanation of the induced fit model and factors (like inhibitors) that affect enzyme action.​
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Nucleic acids - DNA & RNA structure and understand semi-conservative replication.​
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The structure and functions of ATP and importance of water in Biology.
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Biological molecules
Unit 2: Cells
Eukaryote cell structure and function of the key organelles​
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Structure of prokaryotes and viruses compared to eukaryotic cells​
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Microscopes including optical, transmission and scanning electron microscopes​
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The use of cell fractionation and ultracentrifugation to separate cell components.​
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The cell cycle, mitosis, binary fission​ and viral replication
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Transport across membranes including diffusion, facilitated diffusion, active transport, co-transport and osmosis
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Cell recognition and the immune system including active and passive immunity and use of vaccines
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Cells
Unit 3: Organisms exchange substances with their environment
Understand the link between surface area to volume ratio and changes to body structure as the ratio reduces​
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Explain the structure of gas exchange surfaces in single celled organisms, insects, fish and leaves of dicotyledonous plants​
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Explain the features of the human gas exchange system​
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Recall & explain the digestion of carbohydrates, lipids (including micelles) & proteins ​
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Explain mass transport in animals including haemoglobin, oxygen dissociation curves and the Bohr effect​
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Describe the human circulatory system, explain the cardiac cycle & tissue fluid formation
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Mass transport in plants - Describe the cohesion-tension theory of water transport and the mass flow hypothesis for translocation, including tracer and ringing experiments
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Organisms exchange substances with their environment
Unit 4: Genetic information, variation & relationships between organisms
Explain the role of DNA, genes and chromosomes in as cell​
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Explain protein synthesis including details of transcription and translation
Explain the impact of mutations in causing variation, the key steps in meiosis (including independent segregation, crossing over) and its effect on variation in organisms​
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Be able to define genetic diversity and the principles of natural selection, directional and stabilising selection​
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Understand species, courtship behaviours & taxonomy and phylogenic classification​
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Explain what biodiversity is and how it can be measured using an index of diversity​
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Measuring genetic diversity and the use of observable characteristics, DNA or RNA base sequences or amino acid sequences encoded by DNA/RNA.