Search results
Results From The WOW.Com Content Network
RNA viruses generally have very high mutation rates compared to DNA viruses, [8] because viral RNA polymerases lack the proofreading ability of DNA polymerases. [9] The genetic diversity of RNA viruses is one reason why it is difficult to make effective vaccines against them. [10]
Orthopoxvirus particles. A DNA virus is a virus that has a genome made of deoxyribonucleic acid (DNA) that is replicated by a DNA polymerase.They can be divided between those that have two strands of DNA in their genome, called double-stranded DNA (dsDNA) viruses, and those that have one strand of DNA in their genome, called single-stranded DNA (ssDNA) viruses. dsDNA viruses primarily belong ...
It is the first step of viral replication. Some viruses attach to the cell membrane of the host cell and inject its DNA or RNA into the host to initiate infection. Attachment to a host cell is often achieved by a virus attachment protein that extends from the protein shell (), of a virus.
Group VI: viruses possess single-stranded RNA viruses that replicate through a DNA intermediate. The retroviruses are included in this group, of which HIV is a member. Group VII: viruses possess double-stranded DNA genomes and replicate using reverse transcriptase.
Positive-strand RNA virus genomes usually contain relatively few genes, usually between three and ten, including an RNA-dependent RNA polymerase. [4] Coronaviruses have the largest known RNA genomes, between 27 and 32 kilobases in length, and likely possess replication proofreading mechanisms in the form of an exoribonuclease within nonstructural protein nsp14.
Double-stranded RNA (dsRNA) is RNA with two complementary strands, similar to the DNA found in all cells, but with the replacement of thymine by uracil and the adding of one oxygen atom. dsRNA forms the genetic material of some viruses (double-stranded RNA viruses). Double-stranded RNA, such as viral RNA or siRNA, can trigger RNA interference ...
Double-stranded RNA viruses (dsRNA viruses) are a polyphyletic group of viruses that have double-stranded genomes made of ribonucleic acid.The double-stranded genome is used as a template by the viral RNA-dependent RNA polymerase (RdRp) to transcribe a positive-strand RNA functioning as messenger RNA (mRNA) for the host cell's ribosomes, which translate it into viral proteins.
5' small nucleolar RNA capped and 3' polyadenylated long noncoding RNA - SRP RNA: signal recognition particle RNA CL00003: ssRNA single stranded RNA - stRNA: small temporal RNA - tasiRNA: trans-acting siRNA - tmRNA: transfer-messenger RNA RF00023: Bacterial RNA molecule with dual tRNA-like and messenger RNA-like properties uRNA U spliceosomal ...