Ribosomes can catalyze formation of peptide bonds. This supports the hypothesis that ____.
A) an RNA world preceded DNA-based genomes
B) RNA can hold more information than DNA
C) the first protists had RNA as their genetic material
D) RNA's only role is that of an enzyme
E) protocells contained DNA
Correct Answer:
Verified
Q32: A rise in oxygen in Earth's air
Q33: The oldest multicellular eukaryote, a(n) _, can
Q34: Which process or element was present first?
A)aerobic
Q35: What structure may have acted as a
Q36: Mitochondria most resemble _.
A)archaeans
B)aerobic bacteria
C)cyanobacteria
D)early eukaryotes
E)anaerobic bacteria
Q38: The metabolic reactions that occur in all
Q39: In simulations of tidal flat conditions, amino
Q40: Stromatolites were formed by _.
A)animals
B)heterotrophic bacteria
C)photosynthetic bacteria
D)red
Q41: Once an endosymbiotic relationship was established between
Q42: There are several proposed mechanisms that could
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