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Oct 31, 2024 · Cell - RNA Synthesis: The synthesis of RNA is performed by enzymes called RNA polymerases. In higher organisms there are three main RNA polymerases, designated I, II, and III (or sometimes A, B, and C). Each is a complex protein consisting of many subunits. RNA polymerase I synthesizes three of the four types of rRNA (called 18S, 28S, and 5.8S RNA); therefore it is active in the nucleolus ...
DNA stores genetic information, while RNA transfers genetic information and ensures that proteins are synthesized. The characteristics of each molecule support their roles in the cell. -Both DNA and RNA are made up of units called nucleotides-Each nucleotide has three components: a phosphate group, a sugar, and a nitrogenous base.
The first step in expression of a gene, the transcription of DNA into RNA, is the primary level at which gene expression is regulated in both prokaryotic and eukaryotic cells. RNAs in eukaryotic cells are then modified in various ways—for example, introns are removed by splicing—to convert the primary transcript into its functional form.
- Geoffrey M Cooper
- 2000
- 2000
The webpage provides information about the stages of transcription in DNA into RNA.
- Having 2 strands is essential in the DNA replication process, where both strands act as a template in creating a copy of the DNA and repairing dama...
- *Great question*! Not during normal transcription, but in case RNA has to be modified, e.g. bacteriophage, there is T4 RNA ligase (Prokaryotic enzy...
- To add to the above answer, uracil is also less stable than thymine. RNA molecules are constantly being taken apart and put together in a cell, and...
- ATP is need at point where transcription facters get attached with promoter region of DNA , addition of nucleotides also need energy durring elonga...
- Termination in eukaryotes is much more complex and varies depending on the gene and organism. But generally, as mentioned in the article, a polyade...
- This is a good question, but far too complex to answer here. In fact, this is an area of active research and so a complete answer is still being wo...
- If you had, say, a paper clip, and you stretched it out so the wire was straight, and then hold it by one end and press it into a wall, what would...
- Promoters and terminators do not get copied into the new transcript. The promoter is there to tell the RNA to "get ready" and signal the start of t...
- The article says that in Rho-independent termination, RNA polymerase stumbles upon rich C region which causes mRNA to fold on itself (to connect C...
The following descriptions of elongation and termination, given in the context of mRNA synthesis, therefore apply equally well to the synthesis of non-coding RNA. The chemical basis of the template-dependent synthesis of RNA was shown in Figure 3.5. Ribonucleotides are added one after another to the growing 3′ end of the RNA transcript, the ...
- Terence A Brown
- 2002
- 2002
May 15, 2022 · The RNA forming the band at 9S is the messenger RNA for the synthesis of hemoglobin, the major protein synthesized in these cells. In most types of cells, the messenger RNAs are extremely heterogenous, with small amounts distributed from 6S to 25S. Several types of RNA are synthesized in the nucleus of eukaryotic cells. messenger RNA (mRNA)
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May 24, 2024 · A change in conditions — like something in the environment or the presence a disease — can cause the cell to adjust which types of RNA it is making and amounts of different RNAs. Transcriptomes are studied using RNA sequencing. Scientists can sequence the RNA from one cell, known as single-cell RNA sequencing, or many cells from an organism ...
