The Table Below Summarizes the Results of a Replica-Plating Experiment

question 27

Multiple Choice

The table below summarizes the results of a replica-plating experiment where a mixture of 347 E.coli strains of different genotypes were tested for their ability to grow on a variety of media. $\begin{array}{|l|c|}\hline\text { Medium}&\text { Number of colonies that grew}\\\hline\text { complete medium (contains all amino acids, vitamins, } & \\\text { and a variety of carbon sources) } & 347 \\\hline \text { minimal medium (glucose as a carbon source) } & 261 \\\hline \text { minimal medium + ampicillin (an antibiotic) } & 51 \\\hline \text { minimal medium + methionine (an amino acid) } & 303 \\\hline \text { minimal medium + arginine (an amino acid) } & 301 \\\hline \text { minimal medium + methionine + ampicilin } & 57 \\\hline \text { minimal medium + arginine + ampicilin } & 64\\\hline\end{array}$
Based on the data presented above,how many colonies are wild type (met⁺ arg⁺Amp^S) ?

• A)51
• B)210
• C)261
• D)296
• E)347

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