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...
92 KB (10,701 words) - 01:33, 13 September 2024
Viroid (redirect from Viroid RNA)
Viroids are small single-stranded, circular RNAs that are infectious pathogens. Unlike viruses, they have no protein coating. All known viroids are inhabitants...
34 KB (3,906 words) - 17:52, 2 May 2024
Transfer RNA (abbreviated tRNA and formerly referred to as sRNA, for soluble RNA) is an adaptor molecule composed of RNA, typically 76 to 90 nucleotides...
63 KB (7,572 words) - 16:45, 31 August 2024
transfer RNA (tRNA), microRNA (miRNA), small interfering RNA (siRNA), small nucleolar RNA (snoRNAs), Piwi-interacting RNA (piRNA), tRNA-derived small RNA (tsRNA)...
65 KB (7,609 words) - 13:10, 11 September 2024
RNAs such as microRNAs, siRNAs, piRNAs, snoRNAs, snRNAs, exRNAs, scaRNAs and the long ncRNAs such as Xist and HOTAIR. The number of non-coding RNAs within...
68 KB (7,253 words) - 04:01, 23 June 2024
In molecular biology, messenger ribonucleic acid (mRNA) is a single-stranded molecule of RNA that corresponds to the genetic sequence of a gene, and is...
49 KB (5,922 words) - 14:24, 18 August 2024
Abiogenesis (redirect from Lipid world)
current life descends from an RNA world, although other self-replicating and self-catalyzing molecules may have preceded RNA. Other approaches ("metabolism-first"...
203 KB (21,024 words) - 11:50, 6 September 2024
Ribozyme (redirect from Catalytic RNA)
demonstrated that RNA can be both genetic material (like DNA) and a biological catalyst (like protein enzymes), and contributed to the RNA world hypothesis,...
42 KB (5,174 words) - 19:15, 16 September 2024
RNA splicing is a process in molecular biology where a newly-made precursor messenger RNA (pre-mRNA) transcript is transformed into a mature messenger...
38 KB (4,641 words) - 17:18, 12 September 2024
Leslie Orgel (section RNA world)
into the now widely accepted RNA world hypothesis. Almost thirty years later, Orgel wrote a lengthy review of the RNA World hypothesis. This review highlighted...
18 KB (2,045 words) - 23:37, 15 March 2024
filled by RNA, and catalysis was also largely mediated by RNA (that is, by ribozyme counterparts of enzymes). This concept is known as the RNA world hypothesis...
25 KB (3,185 words) - 00:37, 26 July 2024
Small nuclear RNA (snRNA) is a class of small RNA molecules that are found within the splicing speckles and Cajal bodies of the cell nucleus in eukaryotic...
17 KB (2,325 words) - 18:40, 12 September 2024
Common descent (section RNA world)
evolutionary emergence of the DNA world. A world of independently self-replicating RNA genomes apparently no longer exists (RNA viruses are dependent on host...
30 KB (3,067 words) - 22:25, 15 August 2024
RNA-dependent RNA polymerase (RdRp) or RNA replicase is an enzyme that catalyzes the replication of RNA from an RNA template. Specifically, it catalyzes...
27 KB (3,099 words) - 15:01, 25 June 2024
synthesis (messenger RNA translation). Ribosomes link amino acids together in the order specified by the codons of messenger RNA molecules to form polypeptide...
65 KB (7,282 words) - 00:30, 2 September 2024
experiments of self-replicating RNA showed how RNA may have evolved to diverse complex molecules in RNA world conditions. The RNA evolved to a "replicator network...
79 KB (9,031 words) - 18:19, 8 August 2024
An RNA thermometer (or RNA thermosensor) is a temperature-sensitive non-coding RNA molecule which regulates gene expression. Its unique characteristic...
25 KB (2,865 words) - 02:57, 24 May 2024
period followed the hypothesized RNA world and ended with the formation of DNA and contemporary proteins. In the RNP world, RNA molecules began to synthesize...
3 KB (340 words) - 00:43, 7 June 2024
Numerous key discoveries in biology have emerged from studies of RNA (ribonucleic acid), including seminal work in the fields of biochemistry, genetics...
41 KB (4,630 words) - 14:14, 22 July 2024
begun to organize itself and emerge in a pre-cellular era known as the RNA world. The universal presence of both biological translation mechanism and genetic...
16 KB (1,842 words) - 02:01, 13 September 2024
History of Earth (category World history)
hypothesis that earlier life-forms were based entirely on RNA. They could have formed an RNA world in which there were individuals but no species, as mutations...
147 KB (15,847 words) - 18:16, 16 September 2024
History of life (section Replication first: RNA world)
hypothesis of earlier life-forms based entirely on RNA. These ribozymes could have formed an RNA world in which there were individuals but no species, as...
234 KB (22,713 words) - 19:23, 14 September 2024
"strong" RNA world hypothesis: fifty years old". Astrobiology. 13 (4): 391–403. doi:10.1089/ast.2012.0868. PMID 23551238. Cech, T.R. (July 2012). "The RNA worlds...
25 KB (2,323 words) - 15:29, 12 September 2024
different RNA polymerase, RNA pol I for ribosomal RNAs (rRNAs), RNA polymerase II for messenger RNAs (mRNAs) and some small regulatory RNAs, and the RNA polymerase...
18 KB (2,246 words) - 03:17, 16 September 2024
it possessed the genetic code and ribosomes which translated from DNA or RNA to proteins. The LUCA probably existed at latest 3.6 billion years ago, and...
63 KB (6,632 words) - 04:26, 16 September 2024
Retrovirus (redirect from SsRNA-RT virus)
A retrovirus is a type of virus that inserts a DNA copy of its RNA genome into the DNA of a host cell that it invades, thus changing the genome of that...
41 KB (4,727 words) - 02:05, 8 September 2024
reflect a common evolutionary origin as part of ribozymes in an ancient RNA world. It has been suggested that the AMP part of the molecule can be considered...
45 KB (4,623 words) - 22:28, 5 September 2024
them as "living relics" from a hypothetical, ancient, and non-cellular RNA world before the evolution of DNA or of protein. This view, first proposed in...
12 KB (1,110 words) - 00:07, 16 September 2024
other RNA and DNA nucleobases could be obtained through simulated prebiotic chemistry with a reducing atmosphere. The RNA world hypothesis shows how RNA can...
16 KB (1,664 words) - 06:48, 5 November 2023