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Which of these items have a positive impact on PEDCBA transcription?(a) Trp-TRAP(b) Trp-ANTI TRAP(c) Anti-Trp with TRAP(d) Anti-Trp with Trp-TRAPI had been asked this question in an international level competition.The origin of the question is Operons : Trp topic in portion Gene Expression : Transcription Prokaryotes of Cytogenetics

Answer»

Right ANSWER is (d) Anti-TRP with Trp-TRAP

Explanation: Anti- trp is an auto-regulating molecule that is sensitive to different levels of tryptophan. When tryptophan conc. is high enough to FORM trp-TRAP complex yet lower than necessary it binds to the Trp-TRAP complex THUS preventing repression.



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