Steroid hormones bind to ______ receptors, which act as ______ when activated to ultimately regulate gene expression. Select one: a. ionotropic; membrane disruptors b. metabotropic; G proteins c. intracellular; transcription factors d. extracellular; membrane coactivators
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Steroid hormones regulate gene expression by: A. binding directly to DNA in regions where hormone-triggered genes are to be expressed. B. binding to DNA-binding receptor proteins which in turn regulate gene expression. C. binding to coactivators and corepressors which interact with DNA binding proteins to regulate gene expression. D. binding to plasma membrane-bound receptors that then regulate gene expression through activation of an intracellular signaling cascade. E. binding to and activating RNA polymerase II.
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Steroid hormones are synthesized from ______ and bind to ______. a. proteins; membrane receptors b. fatty acids; membrane receptors c. tyrosine; intracellular receptors d. proteins; intracellular receptors e. cholesterol; intracellular receptors
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_________hormones enter target cells and bind to intracellular receptors, whereas _____________hormones bind to cell membrane receptors and never enter the target cells. a. Nonsteroid ... steroid c. Steroid ... nonsteroid b. Protein ... peptide d. Steroid ... carbohydrate
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