AS LEVEL- Biology- Basic components of living systems (Eukaryotic + prokaryotic cells)
- Created by: Ammarah123
- Created on: 31-10-18 20:31
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- Basic components of living systems (Eukaryotic + prokaryotic cells)
- Prokaryotic
- DNA is circular
- No nucleus- DNA is in cytoplasm
- Few organelles + No membrane bound organelles
- Flagella (when present) made out of a protein flagellin arranged in a helix
- Small cells (less than 2?m)
- Cell wall is made out of a polysaccharide
- Small ribsomes (70s, 18nm)
- eg. E.coli bacterium
- Eukaryotic
- Many organelles + Membrane bound organelles
- Flagella (when present) made out of microtubule proteins arranged in a '9+2' formation
- Large ribosomes (80s, 22nm)
- eg. Human liver cell
- Large cells (about 10-100um)
- DNA is circular
- Nucleus present- DNA is in nucleus
- No cell wall (in animals), cellulose cell wall (in plants), chitin cell wall (in fungi)
- Prokaryotic
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