AP BIOLOGY

THE CELL

CELL COMMUNICATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is quorum sensing?
A
communication between bacteria of the same species
B
communication that informs bacteria of how many they are of their species and/or how many there are of other bacterial species
C
communication that allows a species of bacteria to launch a particular behavior together
D
All of the above
Explanation: 

Detailed explanation-1: -Quorum sensing is a process of cell–cell communication that allows bacteria to share information about cell density and adjust gene expression accordingly.

Detailed explanation-2: -Quorum sensing (QS) is cell communication that is widely used by bacterial pathogens to coordinate the expression of several collective traits, including the production of multiple virulence factors, biofilm formation, and swarming motility once a population threshold is reached.

Detailed explanation-3: -Quorum sensing (QS) is a communication mechanism between bacteria that allows specific processes to be controlled, such as biofilm formation, virulence factor expression, production of secondary metabolites and stress adaptation mechanisms such as bacterial competition systems including secretion systems (SS).

Detailed explanation-4: -Quorum sensing is a system of stimulus and response correlated to population density. Many species of bacteria use quorum sensing to coordinate gene expression according to the density of their local population. In similar fashion, some social insects use quorum sensing to determine where to nest.

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