Which region of the λ phage genome enables the linear chromosome to circularize when it enters a host cell?
A)cohesive (cos)site
B)IS10
C)early operators
D)integrase (int)gene
E)excisionase (xis)gene

Question

Quizplus · Accepted Answer

The cohesive (cos) site is a specific region of the λ phage genome that allows for the linear chromosome to circularize when it enters a host cell. This occurs through a process called recombination, which is mediated by the phage-encoded protein, integrase (int). Once the linear chromosome is circularized, the phage can enter the lytic or lysogenic cycle.

Which Region of the λ Phage Genome Enables the Linear