When cells break down proteins, the main waste product is
a. acetic acid.
b. phosphoric acid.
c. amino acids.
d. carbon dioxide.
e. urea.
E
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The function of telomeres can be best described as:
A. attachment sites for the proteins of the kinetochore. B. sequences at the ends of the linear eukaryotic chromosome that protect the ends from proteases. C. sequences of the eukaryotic chromosome that ensure proper distribution during mitosis. D. sequences of the bacterial chromosome that ensure proper distribution during binary fission. E. the sites at which replication initiates.
If adenylyl cyclase were inhibited in animal cells, ____
a. binding of epinephrine to beta receptors would have no affect on cyclic AMP levels. b. binding of epinephrine to beta receptors would increase cyclic AMP levels. c. an increase in mRNA for cyclic AMP would occur. d. an increase in mRNA for more beta receptors would occur. e. epinephrine would not be able to bind to beta receptors.
When RNA polymerase makes an unprocessed mRNA copy of DNA, the copy is called the ________.
Fill in the blank(s) with the appropriate word(s).
Which immunoglobulin class/es can fix complement?
A. IgM and IgG B. IgM only C. IgD only D. IgG only E. IgE and IgA