Table of Contents
Can RNA replicate?
Almost all RNA viruses (except retroviruses) undergo RNA-dependent RNA replication by a virus-encoded RNA-dependent RNA polymerase (RdRP), which specifically replicates the viral RNA genome. It is intuitive that they have to replicate their RNA genome using a cellular enzyme.
Does RNA replicate or duplicate?
Certain RNA viruses — poliovirus, hepatitis C virus and coxsackievirus — and possibly many other families of viruses copy themselves by seizing an enzyme from their host cell to create replication factories enriched in a specific lipid. An RNA virus is a virus that has RNA, rather than DNA, as its genetic material.
Can RNA viruses replicate?
RNA viruses replicate their genomes via one of two unique pathways—either by RNA-dependent RNA synthesis, or among the retroviruses, by RNA-dependent DNA synthesis (reverse transcription) followed by DNA replication and transcription.
Can RNA direct its own replication?
Although RNA seems well suited to form the basis for a self-replicating set of biochemical catalysts, it is unlikely that RNA was the first kind of molecule to do so.
What is the difference between DNA and RNA replication?
The DNA is a double-stranded molecule that has a long chain of nucleotides. The RNA is a single-stranded molecule which has a shorter chain of nucleotides. DNA replicates on its own, it is self-replicating. RNA does not replicate on its own.
Where is RNA replicated?
the cytoplasm
RNA replication occurs in the cytoplasm and is carried out by the viral RNA polymerase. The full length plus strand is coated with nucleocapsid protein as it is made (mRNAs are not coated with this protein, which would interfere with the host protein translation machinery).
What is the purpose of RNA replication?
It leads to RNA replication that promotes the virion assembly (a late phase of the viral life cycle during which all the components necessary for the formation of a mature virion collect at a particular site in the cell, and the basic structure of the virus particle is formed).
How does RNA replication occur?
RNA replication occurs in the cytoplasm and is carried out by the viral RNA polymerase. The full length plus strand is coated with nucleocapsid protein as it is made (mRNAs are not coated with this protein, which would interfere with the host protein translation machinery).
What is replication in RNA?
RNA replication is the process by which new copies of genome-length RNAs are made (figure 8). RNA replication occurs in the cytoplasm and is carried out by the viral RNA polymerase.
Can RNA replicate DNA?
DNA replication initiates at specific points, called origins, where the DNA double helix is unwound. A short segment of RNA, called a primer, is then synthesized and acts as a starting point for new DNA synthesis. An enzyme called DNA polymerase next begins replicating the DNA by matching bases to the original strand.
What is the process of making RNA from DNA?
The process of making RNA from a specific sequence of DNA is called the process of Transcription. It is the first part of Protein Synthesis in Eukaryotic Organisms. (In prokaryotes, transcription and translation occur simultaneously).
What is the process of copying RNA from DNA called?
Types of RNA. Transcription is the process in protein synthesis that involves copying the genetic information contained within DNA into an RNA message. During transcription, certain proteins called transcription factors unwind the DNA strand and allow the enzyme RNA polymerase to transcribe only a single strand of DNA.
What does RNA replicase mean?
Here are all the possible meanings and translations of the word rna replicase. An enzyme that catalyses RNA-template-directed extension of the 3′- end of an RNA strand by one nucleotide at a time, and can initiate a chain de novo. (Enzyme Nomenclature, 1992, p293)
Is RNA a disposable copy of DNA?
RNA is known as ribonucleic acid . It is a disposable copy of a piece of the DNA strand. It is made in the nucleus. It contains the information that DNA gives it to actually physically go out into the cell’s cytoplasm and make the actual proteins. Just like DNA, it is made of repeating units of nucleotides.