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274 rowsUnassigned double stranded RNA viruses Doublestranded RNA (Group III) 2I will keep it very very short and simple dsRNA is very critical in regulation of gene expression at translational level In our system we have specific miRNA (micro RNA) that are somewhat complementary to a specific mRNA and miRNAmRNA binding forms a double stranded molecule that is degraded by our system at a cellular levelDNA and RNA are very similar After all, RNA is supposed to be a copy of DNA However, there are a few differences between the two molecules The biggest difference is in their shape DNA is a twostranded molecule in the form of a double helix RNA, on the other hand, is a singlestranded molecule

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Are there double stranded rna viruses-Most doublestranded DNA viruses replicate within the host cell nucleus, including polyomaviruses, adenoviruses, and herpesviruses—poxviruses, however, replicate in the cytoplasm Adenoviruses and herpes viruses encode their own replication factorsDNA vs RNA Virus Biosynthesis DNA, double stranded, circular (with singlestranded region), reverse transcriptase (RNAdependent DNA polymerase) Cellular enzyme transcribes viral DNA in nucleus;

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There are three additional groups of RNA viruses whose genomes are not mRNAs They are the negative or minus (−)strand RNA viruses, the closely related ambisense RNA viruses, and doublestranded RNA viruses (Table 102and Box 102)The structures of RNA and DNA are almost identical, so there is no reason why you can't have double stranded RNA Similarly DNA can be single stranded In fact, for DNA replication and transcription, the DNA strands must be separated dsRNA and ssDNA are most commonly found in virusesReplication 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 capsids

Doublestranded RNA viruses Doublestranded (ds) RNA viruses are a diverse group of viruses that vary widely in host range (animals, plants, fungi, and bacteria), genome segment number (one to twelve) and virion organization (Tnumber, capsid layers or turrets) Wikipedia Pandoraviridae Family of doublestranded DNA viruses that infect amoebaeDoublestranded RNA viruses The virion (genomic) RNA is double stranded and so cannot function as mRNA;Reverse transcriptase copies mRNA to make viral DNA Viral RNA functions as a template for synthesis of RNA polymerase which copies strand RNA to

Both respiratory syncytial virus (RSV) and influenza A virus induce nucleotide/P2Y purinergic receptormediated impairment of alveolar fluid clearance (AFC), whichThe extracted doublestranded RNA from 312 maize cobs was converted to cDNA, and sequences were determined using an Illumina HiSeq 00 Assembled contigs from many samples showed similarity to Anthurium mosaicassociated virus and Persea americana chrysovirus, putative species in the Chrysovirus genus, and nearly complete genomes were foundIt has been found within viral capsid in the reoviruses of animals and in the wound tumour virus and rice dwarf viruses of plants Singlestranded RNA;

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Find link is a tool written by Edward Betts searching for Doublestranded RNA viruses 13 found (44 total) Viral replication (1,425 words) view diff exact match in snippet view article find links to article genomes, double stranded RNA viruses do not rely on host polymerases for replication to the extent that viruses with DNA genomes doThe 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 polymeraseDouble stranded RNA (dsRNA) ‐always use a viral encoded, RNA‐dependent, RNA polymerase that is found INSIDE the capsid MID 30 There are no enzymes in the cell that can produce mRNAs from the RNA genomes of (‐) strand RNA viruses Single strand RNA

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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 and AsfarviridaeTypes of enzymes found in virions polymerases transcriptases integrases Polymerases in virions copy genome once it enters cell Transcriptases in virions double stranded RNA viruses Baltimore Class 4 single stranded positive RNA viruses Baltimore Class 5 single stranded negative RNA virusesThe structure of different RNA species in Penicilliurn stoloniferurn virus In recent years a great number of doublestranded RNAs have been detected in different viruses

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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 itA) The enzyme probably came from the host animal cell and is coded for by a gene in the host cellA retrovirus is an RNA virus that is duplicated in a host cell using the reverse transcriptase enzyme to produce DNA from its RNA genome The DNA is then incorporated into the host's genome by an integrase enzyme The virus thereafter replicates as part of

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EspadaMurao, L A &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)Is it singlestranded or doublestranded?

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A newlydiscovered doublestranded RNA virus which infects animal cells is found to contain a unique enzyme which synthesizes doublestranded RNA using an RNA template Which of the following statements is likely to be true?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 mRNAMorita, K Delayed cytosolic exposure of Japanese encephalitis virus doublestranded RNA impedes interferon activation and enhances viral dissemination in porcine cells J

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This RNA moves to the cytoplasm where encapsidation by viral proteins occurs There is an encapsidation signal at the 5' end of the RNA and thus only one RNA molecule is found in each virion (compare the situation in retroviruses) Now, in the virus particle itself, the RNA is copied to DNA using reverse transcriptaseThe base composition of a virus was found to be 11% A, 32% G, 18% U and 39% C It this a DNA or RNA virus?A retrovirus is an RNA virus that is duplicated in a host cell using the reverse transcriptase enzyme to produce DNA from its RNA genome The DNA is then incorporated into the host's genome by an integrase enzyme The virus thereafter replicates as part of the host cell's DNA

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School Far Eastern University Manila Course Title FEU 1 Uploaded By AgentDugongPerson458 Pages 24 This preview shows page 3 6 out of 24 pages Linear Complex Small pox viruses DNA Double stranded Linear Complex Papilloma viruses DNA Double stranded Circular Naked icosahedral Bacteriophage s DNA Both Both Complex Parainfluenzae viruses RNAGenerally, DNA genomes are larger than RNA genomes Furthermore, most DNA viruses contain doublestranded DNA while most RNA viruses contain singlestranded RNA These are the key differences between DNA and RNA viruses Viruses are infectious particles that act as obligate parasitesA doublestranded RNA genome isolated from a virus was found to contain 15% uracil What percentage of guanine should exist in this virus's genome?

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The presence of Uracil shows that it is RNA The base composition is unequal, so it must be single stranded 2 Which of these DNA fragments will have a higher melting temperature?DNA stands for deoxyribonucleic acid, which is a molecule that contains most of the genetic instructions of the body DNA viruses can be generally divided into three categories adenoviruses, poxviruses, and inoviruses Once the doublestranded DNA is injected into the host cell, it will enter the nucleus of the cell, where the viral DNA can possibly be integrated with the host cell'sRetrovirus Retrovirus is an RNA virus They insert a copy of their genome into the DNA of host cells In its doublestranded RNA form, which then reverses transcribed into doublestranded DNA, and then gradually inserted into host cell The correct answer is B

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Rotaviruses are doublestranded RNA viruses, with a diameter of 75 nm, which is relatively large among the enteric viruses Unlike the other enteric viruses, which are generally icosahedral in shape, rotaviruses have a more complex morphologyThe genetic material of a virus can be either DNA or RNA The viruses that contain DNA as their genetic material are called the DNA viruses RNA viruses, on the other hand, contain RNA as their genetic material DNA viruses are mostly doublestranded while RNA viruses are singlestranded RNA mutation rate is higher than the DNA mutation rate"NMD also helps us combat viral infections, which is why many viruses either inhibit or evade NMD," she adds "The genome of the virus COVID19 is a positivesense, singlestranded RNA It is well known that other positivesense, singlestranded RNA viruses evade NMD by having RNA structures that prevent NMD from degrading viral RNAs"

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Infectious bursal disease virus (IBDV), a nonenveloped, doublestranded RNA (dsRNA) virus with a T=13 icosahedral capsid, has a virion assembly strategy that initiates with a precursor particle based on an internal scaffold shell similar to that of tailed doublestranded DNA (dsDNA) virusesDouble 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(A) 15% (B) 35%

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The mode of replication of the L doublestranded RNA (dsRNA) present in viruslike particles in Saccharomyces cerevisiae was examined by density transfer experiments After transfer to light medium, significant amounts of fully heavy dsRNA persisted over a number of cell doublingsIt is found in most of the RNA viruses eg tobacco mosaic virus, influenza virus, poliomyelitis, bacteriophage MS2, Avian leukemia virusEndogenous RNA transcription characterizes doublestranded RNA (dsRNA) viruses in the Reoviridae, a family that is exemplified by its simple, singleshelled member cytoplasmic polyhedrosis virus

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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)Rotaviruses are doublestranded RNA viruses, with a diameter of 75 nm, which is relatively large among the enteric viruses Unlike the other enteric viruses, which are generally icosahedral in shape, rotaviruses have a more complex morphologyA telltale sign of viral invasion, doublestranded RNA sounds cellular alarm bells that touch off a firestorm of interferon According to a paper published July 7 in Science Translational Medicine, dsRNAs that arise from nonviral sources, including hexanucleotide expansions in the C9ORF72 gene, can also instigate harmful inflammation

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