OCR•A-Level•Biology
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Foundations in Biology
Cell structure, biological molecules, enzymes, and membranes
Practice 84 subtopics in Foundations in Biology. All questions match the OCR A-Level specification.
About Foundations in Biology
Foundations in Biology is a key topic in the OCR A-Level Biologyspecification. This topic covers cell structure, biological molecules, enzymes, and membranes.
Master all 84 subtopics below with unlimited AI-generated questions. Each subtopic page includes sample questions and the ability to generate unlimited practice questions with detailed solutions.
All Subtopics (84)
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MicroscopyMagnification and resolutionEukaryotic cell structureProkaryotic cell structureUltrastructure of organellesNucleusMitochondriaChloroplastsRibosomesEndoplasmic reticulumGolgi apparatusLysosomesCentriolesComparing plant, animal, and prokaryotic cellsPAG 1: MicroscopyWater propertiesHydrogen bondingCarbohydratesMonosaccharidesDisaccharidesPolysaccharidesGlycosidic bondsStarchGlycogenCelluloseLipidsTriglyceridesPhospholipidsSaturated and unsaturated fatty acidsProteinsAmino acidsPeptide bondsProtein structure levelsFibrous proteinsGlobular proteinsTesting for biological moleculesPAG 2: Biological moleculesDNA structureRNA structureNucleotidesPurines and pyrimidinesComplementary base pairingDNA replicationSemi-conservative replicationATP structureATP as energy currencyEnzyme structureActive siteLock and key modelInduced fit modelEnzyme specificityFactors affecting enzyme activityTemperaturepHSubstrate concentrationEnzyme concentrationCompetitive inhibitionNon-competitive inhibitionCofactors and coenzymesPAG 3: Enzyme investigationsFluid mosaic modelPhospholipid bilayerMembrane proteinsGlycoproteinsCholesterolPassive transportDiffusionFacilitated diffusionOsmosisWater potentialActive transportEndocytosisExocytosisPAG 4: Membrane permeabilityCell cycleInterphaseMitosisCytokinesisCell cycle regulationCancerMeiosisStages of meiosisGenetic variation from meiosisPAG 5: Cell division
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