๐Ÿฆ microbiology review

key term - Quorum sensing

Definition

Quorum sensing is a cell-to-cell communication mechanism used by bacteria to coordinate group behaviors based on population density. It involves the production, release, and detection of chemical signal molecules called autoinducers.

5 Must Know Facts For Your Next Test

  1. Quorum sensing regulates gene expression in response to fluctuations in cell-population density.
  2. Autoinducers are the signaling molecules used in quorum sensing.
  3. The process can control various bacterial activities such as biofilm formation, virulence factor production, and bioluminescence.
  4. Both Gram-positive and Gram-negative bacteria utilize quorum sensing but often use different types of autoinducers.
  5. Quorum sensing can be disrupted by quorum quenching, which involves degrading or inhibiting the signal molecules.

Review Questions

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