AQA Trilogy Science Knowledge Organisers for All Topics

AQA Trilogy Science Knowledge Organisers for All Topics

AQA Trilogy Science Knowledge Organisers for All Topics The information on each page is a summary of key information needed for each topic. It does not cover all content and is not intended as a replacement to other study resources. Please email Mr Allen ([email protected]) if you spot any mistakes or potential improvements. AQA Trilogy Science Paper 1 Biology topics Paper 2 Biology topics Cells and organisation Disease and bioenergetics Cell structure and transport Communicable diseases Preventing and treating disease The human nervous system Adaptations, interdependence and competition Organising an ecosystem Non-communicable diseases Hormonal coordination Biodiversity and ecosystems Cell division Organisation and the digestive system Organising animals and plants Photosynthesis Respiration Biological response Ecology Genetics and reproduction Reproduction Variation and evolution Genetics and evolution Key points to learn 1. Early light

microscopes Use light and lenses. Have magnifications of 100 to 2 000 2. Electron microscope Modern. Use a beam of electrons. Magnifications of up to 2 000 000 3. How much bigger an image appears than the real object eg Magnification of 100, image looks 100 times bigger than object Magnification 4. Resolving power 5. Typical Animal cell Smallest size microscope can show Mitochondria Cell membrane Ribosomes Nucleus Cytoplasm Key points to learn 10. Mitochondria 11 Cell membrane 12 Ribosomes 13Nucleus 6. Typical Plant cell 7. Photosynthesis 8. Specialised animal cells 9. Specialised plant cells Reaction plants use to make glucose from light, H2O and CO2 1. Sperm tail to swim 2. Nerve carry electrical impulses 3. Muscle contract and relax 1. Root hair - absorb water and ions 2. Xylem carry water and minerals 3. Phloem carry glucose to cells Controls movement in/out of cell 15 Vacuole Sack filled with sap. Keeps cell rigid 16 Cell wall Made of cellulose. Supports cell Chloroplasts

Knowledge Organiser Big picture (Biology Paper 1) Controls activities of cell. Contains genes to build new cells Liquid where most reactions happen 17 Collins Revision Guide: Cell Biology Makes proteins by protein synthesis 14 Cytoplasm Cells and organisation Disease and bioenergetics Cell structure and transport Communicable diseases Preventing and treating disease Cell division Green and full of chlorophyll 18 Chlorophyll Absorbs light for photosynthesis 19 Eukaryotic cells Animal cells and plant cells. Have cell membrane, cytoplasm and nucleus 20 Prokaryotic Bacteria. Do not have a nucleus. Genetic material is looped cells Mitochondria Cell membrane Ribosomes Nucleus Cytoplasm Vacuole Cell wall Chloroplasts Perform respiration to release energy Trilogy: B1 Cell structure and transport Organisation and the digestive system Organising animals and plants Particles spreading out in gas/liquid Move from highlow concentration

21 Diffusion Dissolved substances like O2 and CO2 move in/out of cells by diffusion 22 Factors affecting diffusion 1. Difference in concentration (concentration gradient) 2. Temperature 3. Surface area to diffuse through 23 Osmosis Diffusion of water through partially permeable membrane (surface that only lets small particles through). Moves from dilute solution more concentrated solution 24 Active transport Moves substances from lowhigh concentration. Needs energy Non-communicable diseases Photosynthesis Respiration Background Big or small, all organisms are made of cells. Normally too small to see without a microscope, they are the building blocks of all life: animals, plants, insects, microbes and us. Maths skills Prefix Meaning Standard form Mega (M) x 1000000 x 106 kilo (k) x 1 000 x 103 milli (m) 1 000 x 10-3 nano (n) 1 000 000 000 x 10-9

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