Shadow biosphere
A shadow biosphere is a hypothetical microbial biosphere of Earth that uses radically different biochemical and molecular processes than currently known life. Although life on Earth is relatively well...
Solving the Mystery of Desert Varnish
Dark, glassy substance that coats rocks may hold Martian secrets
RNA world
The RNA world hypothesis proposes that self-replicating ribonucleic acid (RNA) molecules were precursors to all current life on Earth. It is generally accepted that current life on Earth descends from...
RNA world - Wikipedia
Riboswitch
In molecular biology, a riboswitch is a regulatory segment of a messenger RNA molecule that binds a small molecule, resulting in a change in production of the proteins encoded by the mRNA. Thus, an m...
Riboswitch - Wikipedia
RNA
Ribonucleic acid (RNA) is a polymeric molecule. It is implicated in various biological roles in coding, decoding, regulation, and expression of genes. DNA and RNA are nucleic acids, and, along with pr...
RNA - Wikipedia
Ribozyme
Ribozymes (ribonucleic acid enzymes), also termed catalytic RNA, are RNA molecules that are capable of catalyzing specific biochemical reactions, similar to the action of protein enzymes. The 1982 dis...
Ribozyme - Wikipedia