Usually,bacteria Only Make Tryptophan When Tryptophan Is Absent or Available

question 6

Multiple Choice

Usually,bacteria only make tryptophan when tryptophan is absent or available in low concentration.However,a particular bacterial mutation makes tryptophan all the time whether or not tryptophan is present.What could explain this phenotype?

• A)the terminator hairpin is unable to form
• B)trpD is mutated
• C)trpA is mutated
• D)the antiterminator hairpin is unable to form
• E)trpE is mutated

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Definitions:

Marginal Value

The additional value or benefit derived from consuming or producing one more unit of a good or service.

Total Utility

The total satisfaction received from consuming a certain amount of goods or services.

Marginal Utility

The incremental utility or happiness a consumer derives from acquiring and using an additional unit of a good or service.

Utility Per Dollar

A measure of the satisfaction or usefulness obtained from purchasing goods or services relative to the amount of money spent.