In the auxin signalling pathway, AUX/IAA proteins: Group of answer choices Directly affect expression of auxin-induced genes by binding to promoter regions of these genes Regulate auxin-dependent gene transcription indirectly by binding to Auxin Response Factors (ARFs) Function as the auxin receptor in plants Undergo poly-ubiquitination after they bind to auxin, activating their role as transcription factors All of the above answers are correct None of the above answers are correct
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With its receptor, auxin co-binds a(n) co-activator protein to ultimately allow expression of auxin responsive genes. A) Binds, co-activator B) Activates, co-activator C) Activates, co-repressor D) Binds, GEF E) Binds, co-repressor Which of the following is the typical sequence of signaling molecules used for light perception and response? A) RTK, GEF, Ras, MAPKKK. B) GPCR, Trimeric G protein, cGMP phosphodiesterase C) GPCR, Trimeric G protein, phospholipase C D) GPCR, Trimeric G protein, cAMP, membrane channel E) RTK, GAP, Ras, MAPKKK
Sulav P.
In the signal transduction process for the hormone auxin, the molecule ubiquitin (a) absorbs blue light (b) becomes phosphorylated (c) tags certain proteins for destruction (d) interacts antagonistically with gibberellins (e) binds to a receptor in the plant cell's plasma membrane.
Signal transduction for both auxin and gibberellins involves a. binding of the hormone to a nuclear receptor. $b$. degradation of a repressor of gene transcription. c. production of a small molecule second messenger. $d$. iight absorption followed by chemical changes. $e .$ breakdown of the hormone.
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