Operons - AP Biology. STUDY. Flashcards. Learn. Write. Spell. Test. PLAY. Match. Gravity. Created by. ajchase220. Terms in this set (33) repression. when bacteria do not make proteins necessary for for biosynthesis.. operon that is repressed in presence of tryptophan and unrepressed in absence of it.
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The tryptophan operon is a repressible operon. When there is enough tryptophan in the cell, tryptophan acts as a corepressor and activates the repressor, changing its shape. The activated receptor binds to the operator and prevents the RNA polymerase from binding to the repressor and stops transcription.
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Expression Of Lac Operon Under Different Conditions Biology Essay. 2213 words (9 pages) Essay in Biology.. called the lac operon which consists of three structural genes, a promoter, a terminator, regulator and an operator (Marks DB et al, 1996).. Biology Essay Writing Service. Dissertation Writing Service. Assignment Writing Service.
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