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  • A mutant strain of T4 Bacteriophage, R-II, cannot cause lysis in E. coli. However, when two strains, R-IIX and R-IIY, are combined, they are able to cause lysis in E. col

A mutant strain of T4 Bacteriophage, R-II, cannot cause lysis in E. coli. However, when two strains, R-IIX and R-IIY, are combined, they are able to cause lysis in E. coli. What could be the reason for this?

Option: 1

The Bacteriophage reverts back to its wild-type form.


Option: 2

The R-II strain has a unique beneficial mutation.


Option: 3

Both R-IIX and R-IIY strains share complementary mutations.


Option: 4

Both R-IIX and R-IIY strains have different mutations that work together to enable E. coli lysis.


Answers (1)

best_answer

When the R-II strain is unable to cause lysis in E. coli, it suggests a mutation that affects its ability to infect and replicate. However, when the R-IIX and R-IIY strains are combined, they exhibit the ability to cause E. coli lysis. This suggests that the two strains have distinct mutations that, when combined, complement each other and enable the lysis of E. coli. Essentially, the mutations in R-IIX and R-IIY work together synergistically, meaning they work together to achieve the desired effect of E. coli lysis.

Hence, the correct answer is option 4. 

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manish

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