Mutation resulting from lack of a mismatch-repairsystem
MC4100 mutS cells are spread onto a single LA/?vir plateand incubated overnight at 37° C. The next day there aremultiple bacterial colonies growing on the plate. Decide whethereach of the following (A-C) could account for the bacterialresistance to ?vir:
I. This could account for the bacterial resistance to?vir.
II. This could NOT account for the bacterial resistance to?vir.
C. A mutation in malK
B. A spontaneous mutation resulting from lack of a mismatch-repairsystem
A. A mutation preventing ?vir from entering the bacterial cell