In the chemical shorthand 14C, the 14
represents the number of
a. excess neutrons.
b. protons plus neutrons.
c. electrons.
d. protons plus electrons.
e. radioactive particles
B
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Consider the HIV enzyme called protease. The amino acid residues at the active site are highly hydrophobic. In designing a drug that would bind to the active site and jam it, researchers should use a molecule that is _____
A) hydrophobic B) polar C) charged D) acidic
Maintenance of the uterine lining during pregnancy in mammals requires
A. estradiol. B. testosterone. C. cortisol. D. aldosterone. E. progesterone.
A cat undergoing surgery has a hemorrhage of 20 ml of blood, from a total blood volume of about 220 ml. How would you expect the cat's blood pressure to respond, assuming the hemorrhage is stopped but no other action is taken?
A. Blood pressure may drop temporarily, then normalize. B. Blood pressure will increase for a few hours. C. The blood pressure response would depend on whether the hemorrhage is internal or external. D. Blood pressure may increase temporarily, then normalize. E. Blood pressure will decrease for a few hours.
Eustress is defined as a level of stress that results in improved performance.
a. true b. false