GCSE · 26 chapters
GCSE Biology
1 lessons out now, 167 planned. Pick your exam board to see only your lessons.
Cells and microscopyBI011 of 5 out
- BI01-00Cells and microscopy - IntroComing soon
- BI01-01Eukaryotic and prokaryotic cells11 min
- BI01-02Sub-cellular structures and what each one doesComing soon
- BI01-03The size and scale of cellsComing soon
- BI01-04Microscopy and the magnification equationComing soon
Cell division, specialisation and stem cellsBI020 of 6 out
- BI02-00Cell division, specialisation and stem cells - IntroComing soon
- BI02-01Mitosis and the cell cycleComing soon
- BI02-02Cell differentiation and how organisms growComing soon
- BI02-03Cell specialisationComing soon
- BI02-04Levels of organisation: cells, tissues, organs and organ systemsComing soon
- BI02-05Stem cells and meristemsComing soon
Enzymes, digestion and metabolismBI030 of 6 out
- BI03-00Enzymes, digestion and metabolism - IntroComing soon
- BI03-01How enzymes work: the active site, specificity and denaturingComing soon
- BI03-02What changes the rate of an enzyme-controlled reactionComing soon
- BI03-03The human digestive system: digestive enzymes and bileComing soon
- BI03-04Building and breaking down carbohydrates, proteins and lipidsComing soon
- BI03-05Measuring the energy in food by calorimetry (triple)Coming soon
Transport in and out of cellsBI040 of 5 out
- BI04-00Transport in and out of cells - IntroComing soon
- BI04-01Diffusion and active transport across the cell membraneComing soon
- BI04-02Osmosis and the change in mass of plant tissueComing soon
- BI04-03Exchange surfaces and the surface area to volume ratioComing soon
- BI04-04What sets the rate of diffusion, and Fick's lawComing soon
Plant tissues and transportBI050 of 6 out
- BI05-00Plant tissues and transport - IntroComing soon
- BI05-01Plant tissues and the structure of a leafComing soon
- BI05-02Root hair cells, xylem and phloemComing soon
- BI05-03Transpiration, translocation and the stomataComing soon
- BI05-04What changes the rate of transpiration, and measuring itComing soon
- BI05-05Plants adapted to extreme environments (triple)Coming soon
Photosynthesis and respirationBI060 of 8 out
- BI06-00Photosynthesis and respiration - IntroComing soon
- BI06-01Photosynthesis: the reaction, its reactants and its productsComing soon
- BI06-02What limits the rate of photosynthesisComing soon
- BI06-03Interacting limiting factors and the inverse square law (Higher) Higher_Only tierComing soon
- BI06-04What a plant does with the glucose it makesComing soon
- BI06-05Respiration: aerobic and anaerobicComing soon
- BI06-06The body's response to exerciseComing soon
- BI06-07Oxygen debt and lactic acid in the liver (Higher) Higher_Only tierComing soon
The heart, blood and circulationBI070 of 5 out
- BI07-00The heart, blood and circulation - IntroComing soon
- BI07-01The heart, the blood vessels and the double circulatory systemComing soon
- BI07-02The blood and its four componentsComing soon
- BI07-03Cardiac output, stroke volume and heart rateComing soon
- BI07-04Coronary heart disease and how it is treatedComing soon
Health, disease and lifestyleBI080 of 5 out
- BI08-00Health, disease and lifestyle - IntroComing soon
- BI08-01Health, disease and how diseases interactComing soon
- BI08-02Lifestyle risk factors for non-communicable diseaseComing soon
- BI08-03Reading disease data: sampling, correlation and causeComing soon
- BI08-04Cancer: benign and malignant tumoursComing soon
Pathogens and infectious diseaseBI090 of 8 out
- BI09-00Pathogens and infectious disease - IntroComing soon
- BI09-01Pathogens and the diseases they causeComing soon
- BI09-02How infections spread, and how the spread is stoppedComing soon
- BI09-03Viral diseases: measles, HIV and tobacco mosaic virusComing soon
- BI09-04Bacterial diseases: Salmonella and gonorrhoeaComing soon
- BI09-05Fungal disease: rose black spotComing soon
- BI09-06Protist disease: malaria and the mosquito vectorComing soon
- BI09-07The virus lifecycle: lytic and lysogenic pathways (triple)Coming soon
Defence, vaccines and medicinesBI100 of 9 out
- BI10-00Defence, vaccines and medicines - IntroComing soon
- BI10-01The body's defences: barriers, white blood cells and the immune responseComing soon
- BI10-02Vaccination and herd immunityComing soon
- BI10-03Antibiotics, antivirals, antiseptics and painkillersComing soon
- BI10-04Discovering and testing a new medicineComing soon
- BI10-05Measuring a zone of inhibition: the area of a circleComing soon
- BI10-06Culturing microorganisms and aseptic technique (triple)Coming soon
- BI10-07Producing monoclonal antibodies (triple, Higher) Higher_Only tierComing soon
- BI10-08Using monoclonal antibodies (triple, Higher) Higher_Only tierComing soon
Plant disease and plant defencesBI110 of 4 out
- BI11-00Plant disease and plant defences - IntroComing soon
- BI11-01Plant pathogens, pests and mineral ion deficiencies (triple)Coming soon
- BI11-02How plants defend themselves (triple)Coming soon
- BI11-03Detecting and identifying plant disease (triple, Higher) Higher_Only tierComing soon
Homeostasis and the nervous systemBI120 of 6 out
- BI12-00Homeostasis and the nervous system - IntroComing soon
- BI12-01Homeostasis: holding internal conditions steadyComing soon
- BI12-02The nervous system, neurones, synapses and the reflex arcComing soon
- BI12-03The brain and what each region does (triple)Coming soon
- BI12-04Investigating and treating the brain (triple, Higher) Higher_Only tierComing soon
- BI12-05The eye, and how sight problems are corrected (triple)Coming soon
Temperature, water and the kidneyBI130 of 6 out
- BI13-00Temperature, water and the kidney - IntroComing soon
- BI13-01Controlling body temperature (triple)Coming soon
- BI13-02Explaining how the thermoregulation mechanisms work (triple, Higher) Higher_Only tierComing soon
- BI13-03The kidney: filtration and selective reabsorption (triple)Coming soon
- BI13-04Kidney failure: dialysis and transplant (triple)Coming soon
- BI13-05ADH, water balance and negative feedback (triple, Higher) Higher_Only tierComing soon
Hormones and blood glucoseBI140 of 6 out
- BI14-00Hormones and blood glucose - IntroComing soon
- BI14-01The endocrine system and its glandsComing soon
- BI14-02Insulin and the control of blood glucoseComing soon
- BI14-03Glucagon and the negative feedback control of blood glucose (Higher) Higher_Only tierComing soon
- BI14-04Type 1 and type 2 diabetesComing soon
- BI14-05Adrenaline, thyroxine and negative feedback (Higher) Higher_Only tierComing soon
Hormones in reproductionBI150 of 5 out
- BI15-00Hormones in reproduction - IntroComing soon
- BI15-01Hormones in reproduction and the menstrual cycleComing soon
- BI15-02How FSH, LH, oestrogen and progesterone interact (Higher) Higher_Only tierComing soon
- BI15-03ContraceptionComing soon
- BI15-04Treating infertility with hormones and IVF (Higher) Higher_Only tierComing soon
Plant hormonesBI160 of 4 out
- BI16-00Plant hormones - IntroComing soon
- BI16-01Plant hormones: auxin, phototropism and gravitropism (triple)Coming soon
- BI16-02Gibberellins and ethene (triple, Higher) Higher_Only tierComing soon
- BI16-03Commercial uses of plant hormones (triple, Higher) Higher_Only tierComing soon
DNA, genes and protein synthesisBI170 of 5 out
- BI17-00DNA, genes and protein synthesis - IntroComing soon
- BI17-01DNA, genes, chromosomes and the genomeComing soon
- BI17-02DNA structure: nucleotides, complementary bases and the triplet codeComing soon
- BI17-03Protein synthesis: transcription and translation (triple, Higher) Higher_Only tierComing soon
- BI17-04How a genetic variant changes a protein or gene expression (triple, Higher) Higher_Only tierComing soon
Reproduction, meiosis and variationBI180 of 6 out
- BI18-00Reproduction, meiosis and variation - IntroComing soon
- BI18-01Sexual and asexual reproductionComing soon
- BI18-02MeiosisComing soon
- BI18-03Variation: genes, environment and mutationComing soon
- BI18-04Weighing sexual against asexual reproduction (triple)Coming soon
- BI18-05Mendel, and how our understanding of genetics developed (triple)Coming soon
Inheritance and genetic disordersBI190 of 9 out
- BI19-00Inheritance and genetic disorders - IntroComing soon
- BI19-01The language of inheritance: alleles, genotype and phenotypeComing soon
- BI19-02Monohybrid crosses: Punnett squares, family trees, ratios and probabilityComing soon
- BI19-03Constructing a Punnett square from scratch (Higher) Higher_Only tierComing soon
- BI19-04Sex determination and the XX / XY crossComing soon
- BI19-05Inherited disorders and embryo screeningComing soon
- BI19-06The human genome and what knowing it lets us doComing soon
- BI19-07ABO blood groups: multiple alleles and codominance (triple)Coming soon
- BI19-08Sex-linked inheritance (triple, Higher) Higher_Only tierComing soon
Evolution and the evidence for itBI200 of 9 out
- BI20-00Evolution and the evidence for it - IntroComing soon
- BI20-01Evolution by natural selection, and how new species formComing soon
- BI20-02Antibiotic-resistant bacteria, and slowing resistance downComing soon
- BI20-03The evidence for evolutionComing soon
- BI20-04Fossils, the incomplete record and extinctionComing soon
- BI20-05Evidence for human evolution: Ardi, Lucy, Leakey and stone toolsComing soon
- BI20-06Classification: Linnaeus, binomial names and the three domainsComing soon
- BI20-07Darwin, Wallace, and how the theory came to be accepted (triple)Coming soon
- BI20-08The pentadactyl limb as evidence of a common ancestor (triple)Coming soon
Selective breeding, GM and cloningBI210 of 6 out
- BI21-00Selective breeding, GM and cloning - IntroComing soon
- BI21-01Selective breedingComing soon
- BI21-02Genetic engineering: what it isComing soon
- BI21-03The steps of genetic engineering (Higher) Higher_Only tierComing soon
- BI21-04Weighing genetic engineering and selective breeding: benefits, risks and ethicsComing soon
- BI21-05Cloning: tissue culture, cuttings, embryo transplants and adult cell cloning (triple)Coming soon
Ecosystems, food chains and biomassBI220 of 8 out
- BI22-00Ecosystems, food chains and biomass - IntroComing soon
- BI22-01Levels of organisation in an ecosystem, and what makes a community stableComing soon
- BI22-02Abiotic factorsComing soon
- BI22-03Biotic factorsComing soon
- BI22-04Interdependence: competition, predation, mutualism and parasitismComing soon
- BI22-05Adaptations, including extremophilesComing soon
- BI22-06Food chains, trophic levels and predator-prey cyclesComing soon
- BI22-07Pyramids of biomass and the efficiency of biomass transfer (triple)Coming soon
Sampling, cycles and decayBI230 of 4 out
- BI23-00Sampling, cycles and decay - IntroComing soon
- BI23-01Sampling a habitat: quadrats, transects and capture-recaptureComing soon
- BI23-02The carbon and water cycles, and the role of decomposersComing soon
- BI23-03Decomposition: what changes the rate of decay, and how we use it (triple)Coming soon
Human impact on biodiversityBI240 of 9 out
- BI24-00Human impact on biodiversity - IntroComing soon
- BI24-01Biodiversity and why it mattersComing soon
- BI24-02How human activity reduces biodiversity: waste, pollution and altered ecosystemsComing soon
- BI24-03Land use and the destruction of peat bogsComing soon
- BI24-04DeforestationComing soon
- BI24-05Global warming and its biological consequencesComing soon
- BI24-06Maintaining biodiversity: conservation, breeding programmes and reforestationComing soon
- BI24-07Indicator species and monitoring pollution (triple, Higher) Higher_Only tierComing soon
- BI24-08How environmental change shifts where species live (triple, Higher) Higher_Only tierComing soon
Food security and feeding the worldBI250 of 5 out
- BI25-00Food security and feeding the world - IntroComing soon
- BI25-01Food security: what threatens it (triple)Coming soon
- BI25-02Farming techniques and intensive food production (triple)Coming soon
- BI25-03Sustainable fisheries (triple)Coming soon
- BI25-04Biotechnology and GM crops to feed a growing population (triple)Coming soon
Required practicalsBI260 of 12 out
- BI26-00Required practicals - IntroComing soon
- BI26-01Required practical: using a light microscopeComing soon
- BI26-02Required practical: testing food for carbohydrates, lipids and proteinsComing soon
- BI26-03Required practical: how pH and temperature change enzyme activityComing soon
- BI26-04Required practical: osmosis and the mass of plant tissueComing soon
- BI26-05Required practical: light intensity and the rate of photosynthesisComing soon
- BI26-06Required practical: sampling a habitat with quadrats and transectsComing soon
- BI26-07Required practical: antiseptics and antibiotics on a bacterial cultureComing soon
- BI26-08Required practical: measuring the rate of respirationComing soon
- BI26-09Required practical: investigating human reaction timeComing soon
- BI26-10Required practical: light and gravity on the growth of seedlings (triple)Coming soon
- BI26-11Required practical: temperature and the rate of decay (triple)Coming soon