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Quorum Sensing

View the animation below, then complete the quiz to test your knowledge of the concept.






1Quorum sensing is based on cell
A)size.
B)shape.
C)density.
D)volume.
E)composition.



2The quorum sensing signal molecule in gram negative bacteria is
A)ethyl methyl ketone.
B)acyl homoserine lactone.
C)methyl guanosine.
D)propyl cortisone.
E)isopropyl aldosterone.



3Arrange the following in the proper order in which they occur during quorum sensing in gram positive bacteria.
1. Phosphorylation of sensor protein
2. Binding of oligopeptide to sensor protein
3. Extracellular transport of oligopeptide
A)1, 2, 3
B)2, 1, 3
C)2, 3, 1
D)3, 2, 1
E)3, 1, 2



4Examples of quorum-dependent proteins are enzymes and virulence factors.
A)True
B)False



5In quorum sensing, the signal molecule binds directly to DNA to activate transcription.
A)True
B)False







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