A process whereby two viruses mix and match parts of their genome is called _____.
A. genetic reassortment
B. genetic diversity
C. point mutations
D. antigenic drift
E. genetic deviation
Ans: A. genetic reassortment
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Hypothetically, if electron pools existed in sufficient numbers for enzymes to use in metabolic reactions,
A) a higher diversity of cytochromes would likely be observed. B) cytochromes would be unnecessary for cells and quinones would be more important. C) Q-cycle reactions would no longer be necessary for electron transport, but the proton motive force would otherwise be unchanged. D) most metabolic pathways for both anabolism and catabolism would have to be rewritten.
What is the role of actin in eukaryotic cells?
A. It forms the centromere that holds sister chromatids together. B. It forms the spindle that pulls chromosomes apart. C. It is necessary for the DNA to replicate. D. It provides strength in stretching and compression of a cell. E. It forms the structures inside flagella that allow the bending motion for cell motion (swimming).
Figure 55-2 is a good illustration of:
a. bioconcentration.
b. biological magnification.
c. persistence.
d. narrow-spectrum botanicals.
e. the pesticide treadmill.
Which of the following is not a function of the liver?
Select one: a. the production of bile b. the production of digestive enzymes c. the production of blood proteins d. the removal of blood toxins e. the storage of iron and certain vitamins