Multiple Choice
Identify the letter of the choice that best completes the avowal or answers the question.
____1.Which putative early Earth condition did moth miller and Ureys experimental apparatus not attempt to simulate instantly?
a.| presence of water vapor|
b.| blood-and-guts lightning storms|
c.| warm seas|
d.| intense UV bombardment|
e.| reducing ambiance|
____2.The early atmosphere of Earth plausibly retained all of the pursual molecules in substantial amounts except
a.| H2.|
b.| CH4.|
c.| CO2.|
d.| N2.|
e.| H2O.|
____3.Which of the following has not yet been synthesized in research lab experiments studying the origin of life?
a.| liposomes|
b.| liposomes with selectively permeable membranes|
c.| oligopeptides and otherwise oligomers|
d.| protobionts that use DNA to program protein synthesis|
e.| amino acids|
____4.Although right-down distinctions between the most evolved protobiont and the first living cell ar unclear, biologists generally agree that one major difference is that protobionts could not
a.| let a selectively permeable membrane boundary.|
b.| perform osmosis.|
c.| call on in size.|
d.| perform controlled, precise reproduction.
|
e.| absorb compounds from the external environment.|
____5.Which of the following statements about the origin of genetic material is most probably correct? The first genes were
a.| DNA produced by reverse transcriptase from abiotically produced RNA.|
b.| DNA molecules whose information was transcribed to RNA and later translated in polypeptides.|
c.| self-replicating, catalytic RNA molecules.|
d.| RNA produced by autocatalytic, proteinaceous enzymes called ribozymes.|
e.| protobionts produced by dehydration syntheses of nucleic acids.|
____6.All are true of the photosynthetic machinery of cyanobacteria, except
a.| it intricate a...If you want to get a full essay, order it on our website: Orderessay
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