Quorum Sensing in <em>Vibrio fischeri</em>

Very Hard Biology Microbiology

The role of quorum sensing in bacterial communication is pivotal in various bacterial behaviors such as bioluminescence, virulence, and biofilm formation. One specific example of this phenomenon is observed in Vibrio fischeri, a bioluminescent bacterium that forms a mutualistic relationship with the Hawaiian bobtail squid. When Vibrio fischeri reaches a certain density, it initiates luminescence via a quorum-sensing mechanism.

Consider the underlying mechanisms of quorum sensing in Vibrio fischeri. Which of the following statements accurately describes the role of N-acyl homoserine lactone (AHL) in this process?

AHL is a byproduct of ATP hydrolysis that inhibits luminescence at high concentrations.

AHL acts as a signaling molecule that accumulates and triggers luminescence by binding to specific receptors.

AHL is synthesized only when the squid is not present, ensuring that luminescence occurs independently.

AHL functions predominantly as a nutrient source for the bacteria, providing energy for luminescence.

Hint

Submitted4.3K

Correct2.5K

% Correct58%