Dead or Alive Specimens, Lowest resolution, Colour 2D image.
Dead specimens, Highest resolution, black and white, 2D image, thin specimens, Electrons Penetrate.
Dead Specimens, Black and white, Electrons scan.
The number of times larger an image is compared with the real size of the object.
Eukaryotic Cells Prokaryotic Cells
Larger Cells Extremely Small Cells
Dna is Linear DNA is circular
Nucleas Present No nucleus (DNA free in Cytoplasm)
No cell wall, Cellulose cell wall in plants Cell wall made of a polysacharide
Many organells Mitochondria present Few organelles, NO mitochondria
Larger Ribosomes Small ribosomes
E.g Human Liver Cell E.g E-coli bacterium
- Maintains Cell Structure
- Protects the Cell
- Enables some cell movement (using structures such as flagella and cilia)
- Plays important roles in intra-cellular transport(the movement of vesicles and organelles)