When an E. coli cell is infected by multiple phages, what route of infection (lytic or lysogenic) will the phages take? Why? Choose one: O A. either lytic or lysogenic because environmental conditions (such as nutrient levels) play a more important role in determining the type of infection O B. neither lytic nor lysogenic because an E. colicell cannot be infected by more than one phage at a time O C. lytic because the multiple phages in the E. colicell need to move from an area of high concentration inside the cell to infect other cells O D. lysogenic because infection by multiple phages suggests a high concentration of phages in the environment and increased competition for cells to infect

The correct option is 'A'

When E.coli is infected by multiple phages,they will take either lytic or lysogenic pathway.

Explanation:

The decision between lysogeny and lytic growth hinges on a delicate balance between the race of two regulatory genes that are C₁ ans Cro viz lambda repressor protein and Cro protein.

If C₁ gene manages to produce enouth repressor which binds or block Operators and turning off all early transcription including transcription Cro genes. That causes Lysogeny.

On the other hand, Cro gene codes for Cro protein which blocks  operators and turning off C₁ genes transcription. This causes Lytic infection.

The winner of the race between C₁ and Cro is determined by the concentration of the gene product which is determined by cellular protease concentration. The CII concentration leads to lysogeny.

the correct answer is b

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