Microbiology

Learn the toughest concepts covered in Microbiology with step-by-step video tutorials and practice problems by world-class tutors.

15. Central Dogma & Gene Regulation

The Trp Operon

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The Trp Operon

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In the Presence of Tryptophan

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In the Absence of Tryptophan

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Problem

The trp operon consists of ________ genes that encode tryptophan biosynthesis enzymes.

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Problem

Under what conditions does the trp repressor block transcription of the trp operon?

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Problem

If the trp regulatory gene mutates so that the repressor protein can no longer bind to tryptophan what will be the result?

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Problem

In the absence of tryptophan, ______:

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Problem

Based on the information you know about the trp operon, is the creation of tryptophan expensive to the cell?