A strain of E. coli is unable to use the UV repair pathway because of an apparent absence of DNA helicase activity. Which UV repair gene is likely mutated in this strain?

Question

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The uvr-D gene encodes a DNA helicase that is involved in the UV repair pathway, specifically in the nucleotide excision repair process. A mutation in uvr-D would result in the absence of DNA helicase activity, impairing the repair of UV-induced DNA damage.

A Strain of E