FINAL EXAM โ Form B โ Correct answers are bolded
1. Prokaryotic ribosomes differ from those present in eukaryotic cytosol. Because of
this, which of the following is correct?
A) Some antibiotics can block protein synthesis in bacteria without effects
in the eukaryotic host.
B) Eukaryotes did not evolve from prokaryotes.
C) Translation can occur at the same time as transcription in eukaryotes but not in
prokaryotes.
D) Some antibiotics can block the synthesis of peptidoglycan in the walls of
bacteria.
E) Prokaryotes are able to use a much greater variety of molecules as food sources
than can eukaryotes.
2. The most important feature that permits a gene to act as a molecular clock is
A) having a large number of base pairs.
B) having a larger proportion of exonic DNA than of intronic DNA.
C) having a reliable average rate of mutation.
D) its recent origin by a gene-duplication event.
E) its being acted upon by natural selection.
3. The four-chambered hearts of birds and mammals are best described as
A) structural homologies.
B) vestiges.
C) homoplasies.
D) the result of shared ancestry.
E) molecular homologies.
4. Assuming that each of these possesses a cell wall, which prokaryotes should be
expected to be most strongly resistant to plasmolysis in hypertonic environments?
A) extreme halophiles
B) extreme thermophiles
C) methanogens
D) cyanobacteria
E) nitrogen-fixing bacteria that live in root nodules
5. The functional role of sporopollenin is primarily to
A) comprise spore surface structures that catch the wind and assist in spore
dispersal.
B) reduce dehydration.
C) make spores less dense and able to disperse more readily.
D) repel toxic chemicals.
E) provide nutrients to spores.
6. Which of the following is correctly described as a primary producer?
A) oomycete
B) kinetoplastid
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