- Created by: saraht83
- Created on: 01-05-16 15:07
Plasma Membrane, Cell Theory + Prokaryotes/Eukaryo
Plasma membrane maintains homeostasis, is selectively permeable, communicates with outside environment, aids in binding and adhering.
Cell Theory - cells are the fundamental units of life, all organisms are composed of cells, cells come from pre-existing cells.
Cell surface is limited by surface-area:volume ratio. Increasing volume decreases surface-area:volume ratio.
Prokaryotic cells - no nucleus, lack distinct organelles, some have cell walls, outside plasma membrane which maintains shape.
Eukaryotic cells - membrane-enclosed nucluse, compartments + organelles.
The cell wall of bacteria contains peptidoglycan.
Gram -ve bacteria have an outer layer of lipopolysaccharide enclosing peptidoglycan layer.
Mycoplasma is a bacteria which lacks cell wall, therefore is unaffected by some antibiotics.