2.1.2 structure of prokaryotic cells and of viruses Flashcards
How prokaryotic cells differ from eukaryotic cells
No membrane bound organelles whilst eukaryotic cell does
No nucleus, eukaryotic has a nucleus containing DNA
DNA is circular and isn’t associated with proteins, eukaryotic DNA is linear and is associated with proteins
Cell wall contains murein and peptidoglycan, eukaryotic cell wall is made of cellulose
Smaller 70s ribosomes, eukaryotic had larger
May have one or more plasmid, capsule surrounding cell and one or more flagella
Prokaryotic cells contain
Cytoplasm that lacks membrane-bound organelles
Smaller 70s ribosomes
No nucleus; single circular DNA molecules that is free in cytoplasm and no associated with proteins
Cell wall that contains murein (a glycoprotein) and peptidoglycan
+ one or more plasmids, capsule surrounding the cell, one or more flagella
Viruses
Acellular and non-living
Includes genetic material, capsid and attachment protein
