3 Group III doublestranded RNA viruses Viruses of this group contain doublestranded RNA (dsRNA) After entering the host body the RNAdependent RNA polymerase (RdRp) transcribed the dsRNA genome into mRNA, later this transcribed mRNA is used for the translation or replication Example of Group III Viruses Reoviridae and Birnaviridae 4Examples of double stranded RNA viruses Baltimore Class 3 reoviruses How do double stranded RNA viruses replicate Baltimore Class 3?But there are no properties, other than the defining property of a ()sense single stranded RNA genome, that extends to all six classes of the Group IV viruses For example, some classes have envelopes (ie, Flaviviridae, Togaviridae, Coronaviridae), and others do not (ie
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What is a single stranded rna virus
What is a single stranded rna virus-DNA virus A virus in which the genetic material is DNA rather than RNA The DNA may be either double or singlestranded Major groups of doublestranded DNA viruses (class I viruses) include the adenoviruses, the herpes viruses, and the poxvirusesRNA viruses are viruses with RNA in their genomes These viruses can be further classified as singlestranded RNA viruses and doublestranded RNA viruses
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1 in a singlestranded RNA virus, a plus strand is one having the same polarity as viral mRNA and containing codon sequences that can be translated into viral protein A minus strand is a noncoding strand that must be copied by an RNAdependent RNA polymerase to produce a translatable mRNA 2 in a singlestranded DNA virus, a plus strand is one contained in the virusPositive strands of RNA generated from negative strand of double strand using viral RNA dependent RNA polymerase positive strands act as mRNA translated in ribosomesExample of viruses classified by caspid design Viruses are classified based on their core genetic material and capsid design (a) Rabies virus has a singlestranded RNA (ssRNA) core and an enveloped helical capsid, whereas (b) variola virus, the causative agent of smallpox, has a doublestranded DNA (dsDNA) core and a complex capsid
HIV1 is a singlestranded RNA retrovirus that uses reverse transcriptase to create a doublestranded DNA copy of its genome which is integrated into the host human's genome prior to making mRNAs (Group VI) The genome structure system classifies both viruses as singlestranded RNA viruses with linear genomesLater, groups of viruses were classified by the type of nucleic acid they contained, DNA or RNA, and whether their nucleic acid was single or doublestranded However, these earlier classification methods grouped viruses differently, because they were based on different sets of characters of the virusThe dsRNA viruses represent a large, diverse group of pathogens (affecting a very wide range of host species), several of which are of medical, veterinary or agricultural importance Many of the icosahedral dsRNA viruses show striking structural and
The doublestranded (ds)RNA viruses represent a diverse group of viruses that vary widely in host range (humans, animals, plants, fungi, and bacteria), genome segment number (one to twelve), and virion organization (Tnumber, capsid layers, or turrets) Members of this fascinating group include the rotaviruses, renowned globally as theThis Video will explain about the replication of Double Stranded RNA viruses Detailed Mechanism and Examples will be discussed in Best way Positivesense singlestranded RNA (ssRNA) viruses are one such way and it is a key aspect of the infectious cycle of the virus Two important examples of
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Thus these viruses also need to package an RNA polymerase to make their mRNA after infection of the host cell Example rotaviruses (belong to reovirus family) RNA viruses that copy their RNA to DNA As expected, within each class, viruses share structural similarities;RNA interference (RNAi) is a genetic regulatory system that functions to silence the activity of specific genes RNAi occurs naturally, through the production of nuclearencoded premicroRNA (premiRNA), and can be induced experimentally, using short segments of synthetic doublestranded RNA (dsRNA)
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DoubleStranded RNA Production of doublestranded RNA (dsRNA) is a part of the coxsackievirus replication cycle It has been shown that dsRNA is able to directly stimulate a dsRNctivated protein kinase (PKR) A major substrate of PKR is the α subunit of the eukaryotic translation initiation factor 2 (eIF2α) Plant viruses are particles of RNA or DNA that infect plants and cause disease Most plant viruses are singlestranded RNA or doublestranded RNA viruses Common plant viruses include mosaic viruses, spotted wilt viruses, and leaf curl viruses Plant viruses are typically spread by either horizontal or verticle transmissionTo remember that REO virus has a doublestranded R NA genome, think " Double R hymes are REO ccuring all the time" "A vegan INFLUENCER ate ( 8 ) 3 BUN nies and upset 10–12 RE aders in 2 ARE as " INFLUENZA virus has 8 segments , BUN yavirus has 3 , RE oviruses has 10–12 , and ARE naviruses has 2
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Double stranded RNA, also known as dsRNA, usually shows up in viruses and is somewhat unusual In viruses, it is a unique characteristic, and only a small number of viral families exhibit this trait RNA hybridization happens when one RNA strand combines, or hybridizes, with either another RNA strand or a deoxyribonucleic acid (DNA) strand They are the negative or minus (−)strand RNA viruses, the closely related ambisense RNA viruses, and doublestranded RNA viruses (Table 102 and Box 102) For each of these groups of viruses, the first synthetic event after genome penetration is Viruses can be differentiated based on how they store their genomic information, such as by DNA or doublestranded RNA Positivesense singlestranded RNA (ssRNA) viruses are one such way and it is a key aspect of the infectious cycle of the virus Two important examples of ssRNA viruses are SARSCoV2 and Hepatovirus A, which cause
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A virus consists of genetic information — either DNA or RNA — coated by a protein Accordingly, they are classified as DNA viruses and RNA viruses The nucleic acid may be single or double stranded, circular or linear, segmented or unsegmented DNA viruses The replication of the positive sense RNA viruses occurs through the doublestranded RNA intermediate Upon infection, the polyproteins encoded for the viral replication are translated The replication of the singlestranded RNA leads to the formation of RNA duplex which in turn is transcribed into singlestranded positive genomic mRNAClass VI viruses ssRNART, also called the retroviruses are RNA reverse transcribing viruses with a DNA intermediate Their genomes consist of two molecules of positive sense single stranded RNA with a 5′ cap and 3′ polyadenylated tail Examples of retroviruses include Human Immunodeficiency Virus (HIV) and Human TLymphotropic virus (HTLV)
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Retroviruses use reverse transcriptase to transform their singlestranded RNA into doublestranded DNA It is DNA that stores the genome of human cells and cells from other higher life forms Once transformed from RNA to DNA, the viral DNA can beReplication occurs in host cytoplasm and converts ssmRNA to dsgenomic RNA But dsRNA is a kind of molecule that cells do not produce, and eukaryotic hosts have various antiviral systems that detect and inactivate dsRNA To circumvent this defenses, many dsRNA viruses are replicating their RNA inside icosahedral capsidsT4 virus that attacks EColi Group 3 double stranded RNA Group 3 examples rotovirus Group 4 () single stranded RNA Group 4 examples single stranded RNA / reverse transcription Group 6 expample HIV Group 7 double stranded DNA/reverse transcription Group 7 example Hep B Other sets by this creator Surgical Practice Final exam prep
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Group VI viruses can integrate this doublestranded DNA into the host genome The Group VI viruses are referred to as retroviruses The Group V viruses, like the Group VI viruses, are singlestranded negative sense RNA virusesAlfalfa mosaic virus Alfamovirus Bromoviridae Unassigned single stranded positivesense RNA viruses Singlestranded, positivesense, RNA (Group IV) 44 alternanthera mosaic virus (AltMV) AltMV PotexvirusIn a double stranded RNA form, retroviruses infect a host cell with their genome, and then are reverse transcribed into double stranded DNA, with the DNA then integrated into the home cell genome When integrated into a host genome, a retrovirus is hard to detect and can lay dormant for prolonged periods, having no discernible effect on the host
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The replication cycle of double stranded RNA viruses are faster than single stranded RNA viruses Double stranded RNA viruses unlike DNA viruses can replicated in the cytosol Rabies, a slowmoving virus, is an example of a double stranded RNA virus A doublestranded RNA virus must produce it own unique viral RNA dependent RNA polymeraseAlthough RNA is typically single stranded within cells, there is significant diversity in viruses Rhinoviruses, which cause the common cold;Answer (1 of 2) here are many viruses with a doublestranded DNA genome that are known to infect mammals They are subdivided into seven virus families Hepadnaviridae, Polyomaviridae, Papillomaviridae, Adenoviridae, Herpesviridae, Poxviridae
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RNA viruses represent a large and important group of pathogens that infect a broad range of hosts Segmented RNA viruses are a subclass of this group that encode their genomes in two or more molecules and package all of their RNA segments in a single virus particle These divided genomes come in different forms, including doublestranded RNA, codingsense singlestranded RNA, rabies virus (rhabdovirus) Doublestranded RNA viruses The virion (genomic) RNA is double stranded and so cannot function as mRNA;Doublestranded RNA (dsRNA) longer than 30 bp is a key activator of the innate immune response against viral infections It is widely assumed that the generation of dsRNA during genome replication is a trait shared by all viruses However, to our knowledge, no study exists in
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Doublestranded (ds) RNA viruses are a diverse group of viruses that infect a large range of hosts like animals, bacteria, plants and fungi Members of this group include the rotaviruses, globally known as a common cause of gastroenteritis in kids, and bluetongue virus, an economically damaging pathogen of cattle and sheep RNA is singlestranded and DNA is double stranded Therefore, reverse transcriptase convert single stranded to double stranded Reverse transcriptase is isolated from retroviruses which means RNA viruses Reverse Transcriptase Example 1 Retrovirus such as human immunodeficiency virus (HIV) is associated with diseases such as acquired Moreover, they cause latent infections Some examples of DNA viruses are Herpes viruses, poxviruses, hepadnaviruses, and hepatitis B What are RNA Viruses?
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And the Ebola virus are singlestranded RNA viruses Rotaviruses, which cause severe gastroenteritis in children and other immunocompromised individuals, are examples of doublestrandedAnswer (1 of 6) Adenovirus, herpes virus, poxvirus and papillomavirus are examples of DNA virus Rotavirus, polio virus, yellow fever virus, dengue virus, hepatitis C virus, measles virus, rabies virus, influenza virus and Ebola virus are examples of
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