In the section "Investigating Life:E. T. and the Origin of Life," what hypothesis were the scientists testing?
A) Organic molecules can be made on Earth.
B) Extraterrestrial life can be detected on meteorites.
C) Life can be created from a mixture of organic molecules.
D) Low-oxygen conditions existed on Earth when production of organic molecules first began.
E) Meteorites can bring organic molecules from extraterrestrial origins to Earth.
Correct Answer:
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Q43: How are the monomers in proteins joined?
A)phosphodiester
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Q46: A nucleotide contains which of the following?
A)amino
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A)atoms.
B)molecules.
C)compounds.
D)polymers.
E)ions.
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