Which of the following is the best definition of a virion?
a. An infective virus inside of a host
b. An infective virus outside of a host
c. An inert virus inside of a host
d. An inert virus outside of a host
e. A virus which has infected a bacteria
Ans: b. An infective virus outside of a host
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The single gene mutation associated with DMD leads to various symptoms that include bone
growth, muscles, and behaviors. This is an example of __________.
a. a polygenic trait b. pleiotropy c. gene manipulation d. codominance
Which of the following events occurs in lung blood?
a. Free H+ binds to hemoglobin. b. Plasma HCO3 ? enters erythrocytes. c. In the plasma, CO2 and H2O are converted into HCO3 ? and H+. d. In erythrocytes, carbonic anhydrase converts CO2 and H2O into HCO3 ? and H+. e. CO2 binds to hemoglobin.
Alcohol can be absorbed by the stomach.
Indicate whether the statement is true or false.
Before leaving the nucleus, the RNA molecule
a. acquires a poly-A tail. b. is released from the STOP signal on the template. c. becomes capped. d. is stripped of its introns. e. does all of these.