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Medical Microbiology (Gene Transfer) Quiz on Colony Communication, created by gina_evans0312 on 23/02/2014.

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Colony Communication

Question 1 of 10

1

What do the HCD genes expressed by the the gram -ve P.aeruginosa do?

Select one of the following:

  • Increase pathogenicity

  • Allow biofilm formation

  • Cause a fibrin clot barrier

Explanation

Question 2 of 10

1

At HCD, P.aeruginosa produced which Homoserine Lactone?

Select one or more of the following:

  • LasI, which are detected by LasR

  • RhlI which are detected by RhlR

  • Mrl, which are detected by MrR

  • FasI, which are detected by FasR

Explanation

Question 3 of 10

1

The homoserine lactones of P. aeruginosa can be detected in the sputum of Cystic fibrosis patients

Select one of the following:

  • True
  • False

Explanation

Question 4 of 10

1

The strains of S.aureus produce 1 of 4 peptides

Select one of the following:

  • True
  • False

Explanation

Question 5 of 10

1

What is the role of each peptide produced by S.aureus?

Select one or more of the following:

  • Stimulates other strains that produce the same peptide

  • Inhibits other strains that produce the same peptide

  • Stimulates other strains that produce different peptides

  • Inhibits other strains that produce different peptides

Explanation

Question 6 of 10

1

P2 & P3 are divergent promoters (they go in opposite directions)

Select one of the following:

  • True
  • False

Explanation

Question 7 of 10

1

In E.Coli, of the P3 stimulated proteins, AgrA is the intracellular transducer,....

Select one of the following:

  • AgrB is the exit channel, AgrD is the autoinducer, AgrC is the receptor

  • AgrV is the exit channel, AgrC is the autoinducer, AgrD is the receptor

Explanation

Question 8 of 10

1

P2 transcribes RNAIII

Select one of the following:

  • True
  • False

Explanation

Question 9 of 10

1

RNAIII controls 100s of genes

Select one of the following:

  • True
  • False

Explanation

Question 10 of 10

1

RNAIII binds to the mRNA close to the ribosomal binding site, and does what?

Select one of the following:

  • Alters the secondary structure to inhibit/promote ribosomal binding

  • Alters the super- secondary structure to inhibit/promote ribosomal binding

  • Alters the tertiary structure to inhibit/promote ribosomal binding

Explanation

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