What drug may protect against having a first heart attack?
A. ACE
B. beta-blockers
C. aspirin
D. acetaminophen
E. t-PA
Answer: C
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In a normal cellular protein, where would you expect to find a hydrophobic amino acid like valine?
A) in the interior of the folded protein, away from water B) on the exterior surface of the protein, interacting with water C) in the transmembrane portion interacting with lipid fatty acid chains D) in the interior of the folded protein, away from water, or in a transmembrane portion interacting with lipid fatty acid chains E) anywhere in the protein, with equal probability
Humans have selectively bred many radically different domestic animals (e.g., St. Bernard and Chihuahua dog breeds). Does this activity result in evolution? Why or why not?
What will be an ideal response?
An organism that many women carry as part of their normal genital microbial flora that may be transmitted to the neonate during childbirth is:
a. Staphylococcus. b. Escherichia coli. c. S. agalactiae. d. G. vaginalis.
A patient is hospitalized with muscle spasms caused by failure of back muscles to relax after contraction. Which of the following would be most likely to help?
A) Inject calcium into the muscle cell, because it is not being released from the sarcoplasmic reticulum. B) Induce tropomycin and troponin to bind to the myosin binding sites on actin. C) Increase the amount of acetylcholine at the synapses between motor neurons and muscle cells. D) Depolarize the motor neurons to send an action potential to the muscle cells.