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1 Δεκ 2023 · Only RNA molecules are capable of combining the two crucial functions for prebiotic evolution: storing and replicating genetic information (1) and catalyzing critical life-sustaining chemical reactions, including RNA replication (2).
One view is that an RNA world existed on Earth before modern cells arose (Figure 6-91). According to this hypothesis, RNA stored both genetic information and catalyzed the chemical reactions in primitive cells.
The RNA world. Biologists used to view RNA as a lowly messenger — the molecule that carries information from DNA to the protein-building centers of the cell. But discoveries since the early 1980s have shown that RNA can do much more.
The RNA world is a hypothetical stage in the evolutionary history of life on Earth in which self-replicating RNA molecules proliferated before the evolution of DNA and proteins. [1] The term also refers to the hypothesis that posits the existence of this stage.
20 Σεπ 2022 · A transformation is taking place in the understanding of the role of RNA in evolution, inheritance, cell and developmental biology, brain function and disorders, ranging from basic science to a myriad of applications, including a new generation of RNA therapies.
11 Νοε 2014 · The RNA World concept is the idea that billions of years ago — before current life based on DNA, RNA and proteins — the primary living substance was RNA or something chemically similar.
5 Οκτ 2015 · In addition to its importance for the origin of life, the RNA World is also an ideal model system for studying fundamental issues about evolution. One such issue is the balance between natural selection, which is largely deterministic, and chance events.
