BRAINCAKECell biology
Revision notes for Cell biology in AQA Combined Science: Trilogy (8464). Every lesson in BrainCake comes with R.E.C.I.P.E. recall steps, a quick check and spaced reviews.
- Eukaryotes and prokaryotesPlant and animal cells are eukaryotic cells.
- Animal and plant cellsMost animal cells have a nucleus, cytoplasm, a cell membrane, mitochondria and ribosomes.
- Cell specialisationCells may be specialised to carry out a particular function.
- Cell differentiationA fertilised egg divides again and again to form an embryo.
- MicroscopyOur understanding of cells has developed as microscopes have improved.
- ChromosomesThe nucleus of a cell contains chromosomes.
- Mitosis and the cell cycleCells divide in a series of stages called the cell cycle.
- Stem cellsA stem cell is an undifferentiated cell, which means it has not yet become specialised for a job.
- DiffusionDiffusion is the spreading out of particles, either gas particles or particles dissolved in a solution.
- OsmosisOsmosis is the diffusion of water from a dilute solution to a concentrated solution through a partially permeable membrane.
- Active transportActive transport moves substances from a more dilute solution to a more concentrated solution.