1a.What signal does not help trigger endospore formation? Increased concentratio

Question

1a.What signal does not help trigger endospore formation?

   Increased concentration of Spo0A
   Limiting environmental nutrients
   Expression of sigma 70
   Quorum sensing

1b.What is not a method prokaryotes use to survive stressful conditions?
   Grouping into multicellular structures
   Altering their cell wall to increase toughness
   Increased motility to leave for better conditions
   Forming specialized spores to withstand harsh conditions
   All of these are methods prokaryotes use

1c.The Myxococcus fruiting body

   is a group of cells with distinct shape and size
   is a group of randomly organized cells
   is where the sporangioles form
   a AND c
   b AND c

Explanation / Answer

1a).   Increased concentration of Spo0A ---> Required for sporulation
   Limiting environmental nutrients ---> Triggers sporulation
   Expression of sigma 70 ---> Does not trigger sporulation
   Quorum sensing ---> Triggers sporulation

The regulation of gene expression in accordance with the cell population size fluctuations is known as quorum sensing. Autoinducers are the signaling molecules released by the quorum sensing bacteria, the concentration of these molecules increase as a function of density of the cell.

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