A catheter colonized by Pseudomonas aeruginosa forms a biofilm. Which mechanism allows the bacteria within the biofilm to coordinate virulence factor expression?

💡 Explanation

Quorum sensing allows bacteria in biofilms to coordinate behavior because autoinducers accumulate, triggering gene expression when a threshold density is reached. Therefore, quorum sensing coordinates virulence, rather than direct protein transfer or sporulation, which are separate bacterial strategies.

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