Multiple Choice
In the absence of tryptophan, ______:
15. Central Dogma & Gene Regulation
The Trp Operon
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Under what conditions does the trp repressor block transcription of the trp operon?
A
When the repressor binds to the inducer.
B
When the repressor binds to tryptophan.
C
When the repressor is not bound to tryptophan.
D
When the repressor is not bound to the operator.
Verified step by step guidance1
Understand the role of the trp operon in bacteria: The trp operon is responsible for the synthesis of tryptophan, an essential amino acid.
Identify the components involved in the regulation of the trp operon: The trp operon is regulated by the trp repressor protein and tryptophan itself.
Learn how the trp repressor functions: The trp repressor is a protein that can bind to the operator region of the trp operon to block transcription.
Determine the conditions under which the trp repressor blocks transcription: The trp repressor blocks transcription when it is bound to tryptophan, which allows it to attach to the operator region.
Recognize the significance of tryptophan binding: When tryptophan levels are high, it binds to the trp repressor, activating it to bind to the operator and prevent transcription, thus conserving resources.
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