Question

A certain strain of E.coli could not be infected by many lambda phages tested. Give at least 2 possible reasons for this?
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Answer 1

Answer:

Enterobacteria phage λ (lambda phage, coliphage λ, officially Escherichia virus Lambda) is a bacterial virus, or bacteriophage, that infects the bacterial species Escherichia coli (E. coli). ... Usually, a "lytic cycle" ensues, where the lambda DNA is replicated and new phage particles are produced within the cell.

Answer 2

Answer:

Enterobacteria phage λ (lambda phage, coliphage λ, officially Escherichia virus Lambda) is a bacterial virus, or bacteriophage, that infects the bacterial species Escherichia coli (E. coli). It was discovered by Esther Lederberg in 1950.