A Researcher Is Looking for Met- Strains

question 45

Multiple Choice

A researcher is looking for met- strains. He compares two plates. One plate has colonies growing on complete medium. The other plate has colonies growing on methionine deficient medium. How can the researcher determine which colonies are met- ? ​

• A)The colonies growing on the methionine-deficient plate are met- .
• B)Colonies growing on complete medium but not on methionine-deficient medium are met- . ​
• C)More experiments must be performed to identify the met- colonies. ​
• D)All of the colonies growing on complete medium are met- . ​
• E)Colonies growing on methionine-deficient medium but not on complete medium are met- . ​

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