Flashcards
general bacterial structure
Flashcards do conjunto (18)
- 1All bacteria has cell wall except....mycoplasma ميكي
- 2what are structures inside the cell wall of the bacteria ....CM , cytoplasm
bacterial genome : chromosome single , plasmid
ribosomes
Inclusion granules - 3what are the structures outside the bacterial cell wallpili sex , normal
capsule
flagella
glycocalyx - 4essential (basic)components in every bacterial cell....1. cell wall
2. CM
3. ribosomes
4.Chromosomes - 5what is the main component of the bacterial cell wall ???PEPTIDOGLYCAN layer
(murein) - 6why is peptidoglycan layer is so rigid? Explain. OR what is the structure of the peptidoglycan?because of the structure:
It's formed of:
1.NAM +NAG alternating
2. tetra-peptides attached to NAM
3. cross link between two tetrapeptides - 7what are the componenets of G+ cell wall structure???1. peptidoglycans
2.Techoic Acid - 8what's the % of ppgs in g+? and how many sheets are they?50%
40 sheets - 9what's the structure of the techoic acid?it's either ribitol-p or glycerol-p
- 10what's the function of techoic acid and in what cell is it?*in G+
1. adhesion
2. surface antigen for G+ - 11what's the structure of G-???1. peptidoglycans
2. outer memb.
3.periplasmic layer
"POP" - 12% of ppgs in G-? and how many sheets??5-10%
1 to 2 sheets - 13what are the components of G- outer membrane?1. inner lipid A
2.middle polysaccharide
3. outer poly saccharide Somatic O ag - 14what's fucnction of Inner lipid in G-?Endotoxin
- 15what's the function of Somatic O ag?works as an Ag and in bacterial typing.
- 16what's the function of the OM in G-???it contains OMPs + porins which works as a passage by diffusion for Low MW paricles ex: suger, aas.
- 17what's the periplasmic space??it's a space between CM And OM in G- contains 1-2 layers of ppgs.
- 18what's the functuon of rhe cell wall in bacteria???3(S) A 2(D)
1.Shape:spiral,cocci,bacilli
2.Staining:G+,G-
3.Support: osmoic pressure
4.Antigenecity:techoic acid,somatic O
5.Diffusion
6.Division