If a Met^-thr^- Hfr Strain Is Mated with an F^-

question 38

Multiple Choice

If a met^-thr^- Hfr strain is mated with an F^- of genotype leu^-thi^-,prototrophic recombinants can be detected by plating the mixture on minimal:

• A)medium.
• B)medium supplemented with leucine and methionine.
• C)medium supplemented with leucine and thiamine.
• D)medium supplemented with methionine,threonine,leucine,and thiamine.
• E)medium supplemented with threonine and thiamine.

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