Which mechanism is NOT used by ncRNAs to bind to other molecules?
A. Complementary base-pairing between the ncRNA and RNA
B. Complementary base-pairing between the ncRNA and DNA.
C. A stem loop structure in the ncRNA binds to a specific protein structure.
D. A stem loop structure in the ncRNA binds to a specific DNA sequence.
E. Several stem loop structures form a shape that binds to a small molecule.
Answer: D
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The term oxidation is derived from the name of the element oxygen. This is reasonable, because oxygen
A. attracts electrons very strongly. B. can be oxidized by accepting electrons. C. contains more electrons than are needed. D. passes electrons to many other types of molecules.
What mechanism would explain how fossils of the same organism can be found in parts of Africa and South America?
a. biogeography b. natural selection c. continental drift d. homoplastic features
e. convergent evolution
Which wavelengths of light are most likely to be absorbed by chlorophyll b?
A. UV B. blue C. red D. infrared
Suppose a population splits into two descendant populations prior to any evolution of dark coloration, then splits again after the evolution of dark coloration. Which of the following is true?
a. Changes in coat color tell us something about evolutionary history. b. Using these analogous traits in building an evolutionary tree might cause us to incorrectly infer a closer phylogenetic relationship between these species than actually exists. c. In this case, dark coloration is not only a derived trait but it is also shared by two populations because it is a homologous trait. d. All but B are true.