21459281
Description
Flashcards by Lamees Sheikh , updated more than 1 year ago
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Created by Lamees Sheikh
about 4 years ago
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| Question | Answer |
| All bacteria has cell wall except.... | mycoplasma ميكي |
| what are structures inside the cell wall of the bacteria .... | CM , cytoplasm bacterial genome : chromosome single , plasmid ribosomes Inclusion granules |
| what are the structures outside the bacterial cell wall | pili sex , normal capsule flagella glycocalyx |
| essential (basic)components in every bacterial cell.... | 1. cell wall 2. CM 3. ribosomes 4.Chromosomes |
| what is the main component of the bacterial cell wall ??? | PEPTIDOGLYCAN layer (murein) |
| why 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 |
| what are the componenets of G+ cell wall structure??? | 1. peptidoglycans 2.Techoic Acid |
| what's the % of ppgs in g+? and how many sheets are they? | 50% 40 sheets |
| what's the structure of the techoic acid? | it's either ribitol-p or glycerol-p |
| what's the function of techoic acid and in what cell is it? | *in G+ 1. adhesion 2. surface antigen for G+ |
| what's the structure of G-??? | 1. peptidoglycans 2. outer memb. 3.periplasmic layer "POP" |
| % of ppgs in G-? and how many sheets?? | 5-10% 1 to 2 sheets |
| what are the components of G- outer membrane? | 1. inner lipid A 2.middle polysaccharide 3. outer poly saccharide Somatic O ag |
| what's fucnction of Inner lipid in G-? | Endotoxin |
| what's the function of Somatic O ag? | works as an Ag and in bacterial typing. |
| what'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. |
| what's the periplasmic space?? | it's a space between CM And OM in G- contains 1-2 layers of ppgs. |
| what'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 |
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