Topic 1 - Cell Biology (1.1 Introduction to cells (Unicellular Organisms…
Topic 1 - Cell Biology
1.1 Introduction to cells
Know how to use light microscopes
Magnification = Measured Length/Actual Length
Cells are the smallest units of life.
All living organisms are composed of cells.
New cells are formed by pre-existing cells.
“All cells contain hereditary information (DNA) which is passed on from cell to cell during cell division”
Exceptions to cell theory
Striated muscle cell
- single surrounding membrane that can contain 100s of nuclei
- Aseptate hyphae, multi-nucleated
- Grow up to 1cm thick. It would be expected that they would be broken up smaller to get rid of metabolic waste more easily
Limitations on cell size
Cell differentiation in multcellular organisms
The origin of cells
1.2 Ultrastructure of cells