prokaryotic cells and viruses
- Created by: Margaret Hobart
- Created on: 01-05-21 14:59
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- prokaryotic cells and viruses
- differences to eukaryotic cells
- smaller
- no membrane-bound organelles
- smaller ribosomes
- no nucleus
- circular DNA, not associated with proteins (plasmids)
- may contain genes for antibiotic resistance
- circular DNA, not associated with proteins (plasmids)
- cell wall made from murrain (a glycoprotein)
- viruses
- non-living
- nucleic acids surrounded by protein
- smaller than bacteria
- no plasma membrane, no cytoplasm and no ribosomes
- invade and reproduce inside other cells (host cells)
- Untitled
- capsid coat
- attachment proteins stick out from capsid
- structures and functions
- flagella - long, hair-like structure that rotates to move cell
- capsule - prevents phagocytosis
- prokaryotic cells replicate by binary fission
- 1. circular DNA and plasmids replicate
- 2. cell gets bigger and DNA moves to poles
- 3. cytoplasm divides
- 4. two daughter cells are produced. each has one copy of circular DNA but variable copies of plasmids
- 3. cytoplasm divides
- 2. cell gets bigger and DNA moves to poles
- 1. circular DNA and plasmids replicate
- differences to eukaryotic cells
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