What is the role of tryptophan in the regulation of the trp operon? tion 11 of 1

Question

What is the role of tryptophan in the regulation of the trp operon?

tion 11 of 12 enetics: A Conceptual Approach Reading Quiz ce &hEdition; Mapde A MHE/Freeman presented by Saping Learnin What is the role of tryptophan in the regulation of the trp operon? O When tryptophan levels are high, tryptophan stimulates the transcription of the trp regulatory gene O When tryptophan levels are low, tryptophan stimulates the transciption of the structural genes. O When tryptophan levels are high, tryptophan binds to RNA polymerase to stimulate transcription. O When tryptophan levels are high, tryptophan binds to the inactive tro repressor, making it active. O When tryptophan levels are low, tryptophan inactivates the trp repressor O Previous ? Give Up & View Solution Check Answer Next a Exit about us carers privacy policy terms of use contact us he ?

Explanation / Answer

When tryptophan levels are high, tryptophan binds to the inactive trp repressor, making it active.

The tryptophan acts as a co-repressor molecule which activates the trp repressor. The trp repressor then binds to the regulatory gene of trp operon and thus switching it off.

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