CH 26 Bio - CH 26 Multiple Choice Identify the choice that...

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CH 26 Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. The first genetic material was most likely a(n) a. DNA polymer. b. DNA oligonucleotide. c. RNA polymer. d. protein. e. protein enzyme. ____ 2. Which gas was probably least abundant in Earth's early atmosphere? a. O 2 b. CO c. CH 4 d. H 2 O e. NH 3 ____ 3. In their laboratory simulations of the early Earth, Miller and Urey observed the abiotic synthesis of a. amino acids. b. complex organic polymers. c. DNA. d. liposomes. e. nucleoli. ____ 4. The early atmosphere of Earth probably retained all of the following molecules in substantial amounts except a. H 2 . b. CH 4 . c. CO2. d. N2. e. H 2 O.
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____ 5. Which of the following is the correct sequence of these events in the origin of life? I. Formation of protobionts II. Synthesis of organic monomers III. Synthesis of organic polymers a. I, II, III b. I, III, II c. II, III, I d. III, I, II e. III, II, I ____ 6. RNA molecules can be both self-replicating and catalytic. This probably means that a. RNA was the first hereditary information. b. protobionts had an RNA membrane. c. RNA could make energy. d. free nucleotides would not have been necessary ingredients in the synthesis of new
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CH 26 Bio - CH 26 Multiple Choice Identify the choice that...

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