A mutant strain of E.coli having defects in one of the DNA repair pathways was identified. To identify the pathways wher
Analysis of a mutant strain of e.coli having defects shows B,D,E represents established outcome. functional assays supports option B, whereas distractors confuse substrate or regulatory direction and fail to reproduce observed results.
Ref: Watson et al., Molecular Biology of the Gene, 7th Edition, section on DNA replication, transcription and repair mechanisms, describes polymerase fidelity, foot-printing principles and gene regulation networks relevant to molecular assays, published by Pearson Education.