Biology › Cells, microscopy and biological organisation
Cells, microscopy and biological organisation
Unit B01 · 5 lessons.
Notes
Illustrated notes for each topic in this unit, with worked examples and a checklist of objectives.
- Eukaryotic cell structure and organelles
The ultrastructure of eukaryotic cells: nucleus, nucleolus and nuclear envelope, rough and smooth endoplasmic reticulum, the Golgi apparatus and the…
- Microscopy, magnification and resolution
The difference between magnification and resolution, how wavelength sets the resolving limit, light microscopes against transmission and scanning…
- Prokaryotic cells and viruses
The structure of a prokaryotic cell, with its murein wall, capsule, flagellum, plasmids, circular DNA and 70S ribosomes, compared with a eukaryotic…
- Cell specialisation and biological organisation
Cell theory as the unifying concept of biology; differentiation and the control of gene expression in outline; totipotent, pluripotent and…
- Plan diagrams and tissue sections
The low-power plan diagram convention and the rules a mark scheme applies to one, where the xylem and phloem sit in cross-sections of a root, a stem…
Questions
89 original questions across 5 topics, every one with a point-by-point mark scheme.
Practical work
The practical capabilities this unit's work belongs to, each with its techniques, its calculations and the errors that cost marks.