All members of the steroid hormone receptor family __________________
(a) are cell-surface receptors.
(b) do not undergo conformational changes.
(c) are found only in the cytoplasm.
(d) interact with signal molecules that diffuse through the plasma membrane.
Choice (d) is correct. All members of the steroid hormone receptor family are intracellular proteins [thus choice (a) is not correct] that interact with signal molecules that can diffuse through the plasma membrane. Once activated, steroid hormone receptors regulate gene transcription in the nucleus [choice (c)]. The binding of the signal molecule induces a large conformational change in the receptor protein [choice (b)]. This conformational change activates the steroid hormone receptors, allowing them to promote or inhibit the transcription of the appropriate genes.
You might also like to view...
In general, the form of energy that is least useful to living organisms is
a. chemical. b. electrical. c. heat. d. light. e. sound.
The activation energy of a reaction refers to the
minimum amount of energy a. released by the reaction. b. in the reactants. c. in the products. d. necessary to cause it to proceed on its own. e. difference between the energy of the reactants and the energy of the products.
The rate of aggressive interactions among individuals increases as population density increases
Indicate whether the statement is true or false
The DNA double helix is held together by (covalent/ionic/hydrogen) bonds
What will be an ideal response?