The cerebrum is associated with the
A. third ventricle.
B. fourth ventricle.
C. two lateral ventricles.
D. anterior ventricle.
E. posterior ventricle.
Answer: C
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Phenylketonuria (PKU) is extremely common in Ireland, affecting approximately 1 in 4500 live births. Assuming that the population is in Hardy-Weinberg equilibrium, what is the frequency of PKU carriers?
A) 0.022% B) 98.5% C) 2.9% D) 1.49% E) 2.2%
If blood transports hormones throughout the body, how do they communicate with specific targets?
A. Axonal pathfinding mediates the delivery of hormones to their specific targets. B. Special gateway valves in the blood vessels direct hormones to their target tissues. C. Only target tissues have receptors that allow them to receive the signal. D. Special carrier proteins "walk" along microtubule tracts to deliver the hormones to their targets.
During translation, translocation refers to
A. moving the ribosome along the mRNA molecule. B. joining a tRNA molecule to the ribosome. C. releasing a tRNA molecule from the ribosome. D. joining an amino acid to the next amino acid in the chain. E. joining an amino acid to a tRNA molecule.
You are interested in developing an inhibitor for the estrogen receptor. You have identified a molecule that is small and hydrophilic. In a test tube, this inhibitor binds tightly to the estrogen receptor and inhibits the interaction of the receptor with estrogen. Do you think that this molecule will be an effective inhibitor of the estrogen receptor in cells?
A. Yes, because it is small. B. No, because it will need to bind to the DNA-binding domain to act as an inhibitor. C. No, because it is hydrophilic. D. Yes, because it can prevent estrogen binding.