9.) How much time will two E. Coli cells take to become 32 cells if the average duplication time of E. coil is 20 minutes? What is the role of centrioles apart from spindle formation?

 

1.     9,) How much time will two E. Coli cells take to become 32 cells if the average duplication time of E. coil is 20 minutes? What is the role of centrioles apart from spindle formation?

 A,)

How much time will two E. Coli cells take to become 32 cells if the average duplication time of E. coil is 20 minutes? 

1 hour - 20 minutes

These are the 4 subsequent cell divisions to produce 16 cells and each division takes =20 min
No. of cells formed after each division is 2 to form 32 cells, the E.coli cells need to undergo 5 division cycles, ($2^5$ ) = 32 cells

The duration for each cycle is 20 mins.

Therefore, the total time required for 5 cycles is 20 X 5 =100 min or 1 hr 40 mins

1.     What is the role of centrioles apart from spindle formation?

The two centrioles in the centrosome lie perpendicular to each other. Each has organisation like a cart wheel. These form the basal body of cilia and flagella of plant/animal cells besides forming spindle fibre in animal cell division. It also helps in the formation of microtubuless and sperm tail.