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6. along w classification, what is another advantage cell walls have to man?
- Provides selective toxicity for anti-microbials
- Provides non-selective toxicity for anti-microbials
7. which amino acid essential for cross linking
8. Protein A of S. aureus competes w what for the Fc region of opsonising antibodies?
- nicotinic receptors
- neutrophil receptors
- peptidoglycan receptors
- nociceptors
9. what residues does Teichoic acid contain
- glycerophosphate or peptidoglycan phosphate residues
- glycerophosphate or ribitol phosphate residues
- peptidoglycan or ribitol phosphate residues
10. in Protein A of S. aureus: what region does it bind
- Binds Fc region of IgG
- Binds Fc region of IgA
- Binds Fd region of IgA
- Binds Fd region of IgG
11. Act as transport proteins for larger metabolites including: select incorrect answer
- gram positive bacteria
- Nucleosides
- Maltose
- Oligosaccharides
12. what protein will Present as fine processes called fimbriae and Protects from phagocytosis for group A streptococcus?
- C protein
- M protein
- A protein
- N protein
13. Peptidoglycan: select false statement
- In Gram-positive bacteria, cross linking involves a peptide interbridge
- Cross linking of NAM with a tetrapeptide
- Cross linking of NAM with a tripeptide
- Characteristic for each specific bacterium
- In S. aureus each interbridge peptide consists of 5 molecules of the amino acid glycine connected by peptide bonds (peptapeptide)
14. which protein is present in wall of S. aureus?
- protein c
- protein n
- protein a
- protein m
15. what facilitates transport into the cell? Roughly 100 on cell surface
10 angstrom (Å) diameter
- Porin protein forming channels in the membrane
- Nucleosides
- Maltose
- Oligosaccharides
16. a cytoplasmic membrane contains: select wrong answer
- basic structure of 2 sugar derivatives connected in b1-4 linkages
- Ion pumps to maintain membrane potential and synthetic enzymes
- A coiled portion of the membrane, the mesosome
- The mesosome acts as an anchor to bind and pull apart daughter chromosomes during cell division
17. outer membranes are unique to gram negative bacteria, select incorrect answer
- provides space for osmotic granules to leave cell: removing toxins
- Outer edge of outer membrane is different from any other biological membrane
- Maintains structure and forms permeability barrier to large molecules:
e.g. lysosyme
- Provides protection from adverse environmental conditions such as the human digestive system
18. excess of LPS leads to what? (mainly)
- skin discolouration
- septic shock
- brain damage
- rheumatoid arthritis
19. membrane pores: select incorrect statement
- Less permeable to hydrophobic molecules
- Less sensitive to antibiotics
- Permeable/ highly sensitive to antibiotics
- Permeable to hydrophilic molecules
20. what is released during the cross linking step
- Precursor form of the peptide has an extra L-ala
- Precursor form of the peptide has an extra D-ala
- Post form of the peptide has an extra D-ala
