RNA VIRUS Jiny Kim

WHAT IS IT? It is a virus that has RNA (ribonucleic acid) as its genetic mateterial It is usually single-stranded buy may be double stranded

SINGLE-STRANDED RNA VIRUSES Can be further classified into positive-sense and negative-sense Positive-sense viral RNA is similar to mRNA and can be translated immediately by host cell Negative-sense viral RNA must be converted to positive-sense RNA before translation

MUTATION RATE RNA viruses generally have higher mutation rates than DNA viruses because the RNA polymerase is likely to commit errors, unlike the DNA polymerase that has the ability to proofread.

DNA VIRUS VS. RNA VIRUS DNA virus - Mostly double-stranded - Higher mutation rate - DNA replication usually takes place in the nucleus - stable - injects genetic code in the host DNA for duplication and decoding RNA Virus - Mostly single-stranded - RNA replication usually takes place in the cytoplasm - unstable - skips duplication and decoding

VIRAL REPRODUCTIVE CYCLE - Virus enters a host cell and injects its RNA strand and capsids - The virus uses the host cell's resources to generate a new RNA by replicating a template RNA. mRNA generates new capsids through RNA translation - Newly formed RNAs and capsids fuse together to form a new RNA virus.

SOURCES between-dna-and-rna-viruses/