If a Strain of Bacteria Had a Mutation That Blocked

question 41

Multiple Choice

If a strain of bacteria had a mutation that blocked expression of the lac repressor,what would you expect as a result?

• A)The mutant strain would outcompete wildype strains,since it could always utilize lactose.
• B)The mutant strain would grow at the same rate as wildtype if lactose was not present.
• C)The mutant strain would waste energy producing enzymes in the absence of lactose.
• D)The mutant strain would act the same,because it would still require lac activator protein to turn on.

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