Which of the following characteristics of steroid hormone receptors are shared by both type I and type II receptors?
A. The receptor is always located in the nucleus.
B. The receptor only binds to the response element when bound by hormone.
C. The direct binding of hormone is required for transcriptional activation.
D. All of the choices are correct.
C
You might also like to view...
During a stressful interval, _____
A) thyroid-stimulating hormaon (TSH) stimulates the adrenal cortex and medulla to secrete acetylcholine B) the alpha cells of islets secrete insulin and simultaneously the beta cells of the islets secrete glucagon C) adrenocorticotropic hormone (ACTH) stimulates the adrenal cortex, and neurons of the sympathetic nervous system stimulate the adrenal medulla D) the posterior pituitary gland secretes more growth hormones E) the calcium levels in the blood are increased due to actions of two antagonistic hormones, epinephrine and norepinephrine
There are little birds that spend a great deal of time on the back of a rhinoceros and eat the blood-sucking ticks out of the rhino's ears. The rhino greatly benefits from the relationship, since it cannot remove the ticks itself. The tick-rhino relationship is an example of ________.
A. mutualism B. predator-prey C. commensalism D. parasitism
An insect population that becomes resistant to a commonly used insecticide is an example of _____.
A. natural selection B. a founder effect C. disruptive selection D. gene flow E. genetic drift
Dosage compensation in mammals typically involves the random inactivation of one of the two X chromosomes relatively early in development. Such X chromosome inactivation often leads to phenotypic mosaicism. Assume that black fur in cats is due to the
X-linked recessive gene b, whereas its dominant allele B produces yellow fur. A Bb heterozygote is a mosaic called "tortoise shell" or "calico." A mating between a black male and a calico female occurred. Give the phenotypes of the offspring. A) all black regardless of sex B) calico females, black females, yellow makes, and black males C) calico females and yellow males D) all calico regardless of sex E) calico females, yellow females, black males, and yellow males