1 Prokaryotic Structure Flashcards
What are the 2 domains/structure?
Archea and Bacteria
Archea
Live in harsh conditions
Bacteria
account for most prokaryotes on earth
Cell Wall
covalently linked layers of peptidoglycan
Gram Positive
many layers of peptidoglycan held by amino acid cross bridge called pili; simple wall
Gram Negative
few layers of peptidoglycan and a layer of lipopoly saccharide; turns pink
Penicillin
prevents formation of pili and leads to cytolysis; gram positive best
Periplasmic space
gap between the cell wall and cell membrane
Periplasmic space is an active area for what and because of this what is there?
cell metabolism
Peptidoglycan, digestive enzymes, transport proteins
Endospores
Resting stages for bacteria
Characteristics of endospores
Does not aid in reproduction
little water
Most bacteria produce single endospore
Fagella
made up of 3 protein threads and a hook
What is the fagella used for?
movement
not always single
Phili
tiny protein thread that project from surface of cell
What does phili do and what happens?
Attach to host cells
pilus bridge formed between 2 bacteria cells that plasmid move across