An Arg- Strain of E

question 1

Multiple Choice

An arg- strain of E. coli is transformed with a plasmid carrying the wild-type (arg+) gene. The transformed cells are replica-plated to two minimal medium plates, one supplemented with arginine and one without. The transformed cells would grow on

• A) only the plate lacking arginine.
• B) only the plate supplemented with arginine.
• C) both plates.
• D) neither plate.
• E) the plate supplemented with arginine only if a mutation occurred.

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