Ch03 Quiz Summer 2010 - 1 of 20 Nucleotides a. b. c. d....

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Ch03-Macromolecules and the Origin of Life 1 of 20 Nucleotides  a. are the monomers of DNA and RNA. b. are normally present in polysaccharides. c. play essential roles in energy transduction. d. do not contain phosphate. e. Both a and c 2 of 20 Extensive volcanic eruptions early in the history of Earth are thought  to have added all of the following gasses to the atmosphere  except   a. hydrogen sulfide. b. nitrogen. c. sulfur dioxide. d. carbon dioxide. e. oxygen. 3 of 20 A yeast was cultured in the presence of radioactive phosphate and  the following biological molecules purified. Which molecule, or  molecules, should be radioactive?  a. RNA b. Amino acids
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c. An oligosaccharide d. Membrane lipids e. Both a and d 4 of 20 Which of the following statements about starch is  false a. Starch may be partially branched. b. Starch is a polymer of glucose. c. Starch is formed by the condensation of monomers. d. The properties of starch are very similar to those of cellulose. e. Starch is digested by people. 5 of 20 A fat is most closely related to which one of the molecules listed  below?  a. A wax b. A phospholipid c. An oil d. Cholesterol e. A carotenoid 6 of 20 The Miller-Urey experiment showed that biological molecules could  be made from inorganic precursors. These results  a. support the theory that life's molecules originated outside Earth.
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