Answered: Describe the molecular mechanism by…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question

Describe the molecular mechanism by which quorum
sensing controls bioluminescence in V. fischeri.

Expert Solution

Step 1

The bacterial cell communicates with each other using signaling molecule secreted by them concerning their density. This provides ability to the bacterial cell to regulate their gene expression. The molecules secreted by the bacteria are called autoinducer. The autoinducer enters the cells directly or by binding with a membrane-bound receptor. The Vibrio fischeri is a marine bacteria that is non-bioluminescent in sea-water when free-living. This bacteria becomes bioluminescent when its cell density increases and produces blue-green light using quorum-sensing.

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