Microbiology - Basic Bacteriology (Bacterial Structures) Flashcards
What gives rigid support, protects against osmotic pressure?
Pepetidoglycan
What is the chemical composition of peptidoglycan?
Sugar backbone with peptide side chains cross-linked by transpeptidase
In gram positive what serves as major surface antigen?
Cell wall / cell membrane
In gram positive what induces TNF and IL-1?
Lipoteichoic acid
What structure is unique to gram positive?
Lipoteichoic acid
What is Lipoteichoic acid made of?
Combination of lipids and teichoic acids
What is unique to gram-negative organisms?
Endotoxin/LPS (outer membrane)
Which structure serve as site of endotoxin (LPS) as major surface antigen for gram negatives?
Outer membrane
What particular component of outer membrane (LPS) in gram negative induces TNF and IL-1?
Lipid A
In gram positive, what induces TNF and IL-1?
Lipoteichoic acid
What serves as the antigen in gram negative?
O polysaccharide
What serves as a site of oxidative and transport enzyme?
plasma membrane
What is the name of the space between cytoplasmic membrane and outer membrane in gram-negative bacteria?
Periplasm
What is the function of periplasm?
Containes hydrolytic enzymes including beta lactamase
Which structure mediates adherence of bacteria to cell surface?
Pilus/fimbria
what is pilus/fimbria made of?
glycoprotein
Flagellum provides ( ) and is made of ( ).
- motility
2. protein
which structure is resistant to dehydration, heat, and chemicals?
spore
what is spore made of?
- keratin-like coat
- dipicoloinic acid
- peptidogylcan
which structure serves to contain a variety of genes for antibioitc resistance, enzymes, and toxins?
plasmid
which structure mediates adherence to surfaces, especially foreign surfaces such as indwelling catheters?
Glycocalyx
what is glycocalyx made of?
polysaccharide
