EColi Cells That Have Null Mutations in the Gene Encoding

Multiple Choice

E.coli cells that have null mutations in the gene encoding adenine methylase will have:

A) a higher spontaneous mutation rate than wild-type E.coli.
B) the same spontaneous mutation rate as wild-type E.coli.
C) a lower spontaneous mutation rate than wild-type E.coli.
D) more double-strand breaks in their DNA than wild-type E.coli.
E) fewer double-strand breaks in their DNA than wild-type E.coli.