We grow resistant (Str^r)cells to a concentration of 10⁹ and plate them on a medium with 25 µg/mL gentamicin.Six colonies grow.These cells should be

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Quizplus · Accepted Answer

Cells initially resistant to streptomycin (Str^R) and grown to a high concentration, then plated on a medium with gentamicin, with colonies growing, indicates they are resistant to both antibiotics, hence Str^R Gen^R.

We Grow Resistant (Strr)cells to a Concentration of 109 and Plate

We Grow Resistant (Str^r)cells to a Concentration of 10⁹ and Plate