A mutant of E. coli is designated Strr and arg-. Which of the following best describes this genotype?

A mutant of E. coli is designated Strr and arg-. Which of the following best describes this genotype?






A) antibiotic resistant, prototrophic
B) antibiotic resistant, auxotrophic
C) antibiotic sensitive, prototrophic
D) antibiotic sensitive, auxotrophic
E) antibiotic resistant, carbon-source mutant





Answer: B


Biology

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