Many of the gene products involved in DNA synthesis were initially defined by studying mutant E. coli strains that could not synthesize DNA.
(a) The dnaE gene encodes the a subunit of DNA polymerase III. What effect is expected from a mutation in this gene? How could the mutant strain be maintained?
(b) The dnaQ gene encodes the e subunit of DNA polymerase. What effect is expected from a mutation in this gene?
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