There Are Several Hypotheses Considered for the Evolutionary Pathway to Life.Which

question 107

Multiple Choice

There are several hypotheses considered for the evolutionary pathway to life.Which line of evidence constitutes support for the hypothesis that an "RNA world" preceded the modern "DNA world"?

• A) The great majority of biological catalysts in modern living systems are proteins.
• B) RNA carries the biological information needed to direct protein synthesis in modern cells.
• C) RNA is single-stranded rather than double-stranded.
• D) In modern cells, ribozymes catalyze peptide bond formation.
• E) RNA and DNA use slightly different sets of nitrogenous bases.

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