Before ARF transcription factors can trigger auxin-induced gene expression, what must happen?

A. Auxin binds to ubiquitin, a degradation tag.
B. Ubiquitin must destroy TIR1 to release Aux/IAA proteins.
C. Auxin must bind to the ARF transcription factor.
D. Auxin degrades Aux/IAA proteins which repress ARF transcription factors.
E. Auxin binds to TIR1, an auxin receptor.


Answer: E

Biology & Microbiology

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