6. what is Capsule loosely attached to cell wall and easily washed off
glycocalyx
Slime
Capsule
7. Bacterial chromosomes are: Single circular chromosome of double stranded DNA, called a nucleoid
300 to 400 m in length and supercoiled like a rubber band
Genes arranged linearly along the chromosome
Size range from 600 to 9500kb (9.5Mb)
and are compo
Guanine
Cytosine
Adenosine
Adenine
Thymine (uracil in RNA)
8. what are longer pili or fimbriae?
pili
fimbriae
9. what cells are poor recipients for the same or similar plasmid
Cells already containing a plasmid
Cells not containing a plasmid
Cells already containing a episome
10. what allows sex pilis to be formed and allow bacterial conjugation. F+ and F- (F+ indicates fertility)
endospores
plasmids
epispores
11. during Prokaryotic protein synthesis, Location of protein encoding genes determined by looking for Open Reading Frames (ORF): select incorrect statement
Central codon
Start codon
Codon (triple sequences)
Stop codon
12. Pili and fimbriae are Fine hair like filaments on the surface of many Gram negative bacteria. what are they NOT involved in?
tissue specificity
motility
attachment of bacteria to host cells
13. Sex pili and conjugation is an Efficient manner for transfer of what
antimicrobial resistance
antimicrobial polarity
conjugative polarity
14. capsules and slime layers have variable thicknesses, what is Too thin to be seen on light microscope, and detected by antisera?
Klebsiella spp. and Salmonella spp
Microcapsule of E. coli and Salmonella spp
Microcapsule of E. coli and Streptococcus pneumoniae
Klebsiella spp. and Streptococcus pneumoniae
15. what of E. coli can also mobilise the chromosome to be transferred through cell to cell contact
Pili plasmid
F plasmid
episome
chromosome
16. After conjugation the previously negative cell has a copy of the plasmid and is able to pass it on to what
another cell
different area of itself (Same cell)
17. 30S contains how many RNA (small subunit)
16S
23S
18. Both involved in attachment of bacteria to host cells
: select incorrect statement
Bind to lectins on cell surfaces, e.g sugar binding proteins
