Question

Discuss the evidence supporting the RNA World Hypothesis and its  implications for understanding the transition from prebiotic chemistry to cellular life.

10 Feb 2025
Answer :
Word Count : 653

The RNA World Hypothesis posits that life on Earth may have begun with self-replicating RNA molecules, which could have carried genetic information and catalyzed biochemical reactions before the advent of DNA and proteins. This hypothesis is supported by a variety of molecular, biochemical, and experimental evidence, which underscores the versatility of RNA in both storing genetic information and catalyzing chemical reactions.

One key piece of evidence supporting the RNA World Hypothesis is the discovery of ribozymes—RNA molecules that have catalytic activity. In the 1980s, Thomas Cech and Sidney Altman independently discovered that RNA could catalyze reactions, a role previously thought to be exclusive to proteins. This demonstrated that RNA is not merely a passive carrier of genetic information, but could also facilitate biochemical reactions. This catalytic ability of RNA suggests _________ _______ _________ __________ ___ ___ ___ _____.
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