Which element is NOT characteristic of the primary structure of proteins?
a. carbon
b. hydrogen
c. phosphorus
d. sulfur
e. nitrogen
C
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Which of the following is a permanent post-translational covalent modification?
A. attachment of a sugar B. disulfide bond formation C. proteolytic processing D. attachment of a lipid E. All of the choices are correct.
In human populations, Hardy-Weinberg equilibrium is seen
A) in small, isolated communities. B) in populations with many immigrants. C) in communities founded by a small number of people. D) infrequently and in large communities with random mating.
Which of the following is NOT possible for
incomplete flowers?
a. self-pollination b. attract pollinators c. form seeds d. form fruits e. all of these are possible for incomplete flowers
To assign absolute dates to fossils in this sediment core, it would be most helpful if _____
A) we knew the order in which the fossils occurred B) the sediments had not been affected by underwater currents during their deposition C) volcanic ash layers were regularly interspersed between the sedimentary strata D) fossils throughout the column were equally spaced apart