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As of May 2019 (v 3.1.5), Phylo comes in three game modes: . Story mode, with levels arranged in a guided tutorial; The original Phylo mode, with the choice of diseases; A new Ribo mode for RNA molecules, where both sequences and RNA secondary structures (stem-loops) are aligned.
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.
This is a list of mnemonics used in medicine and medical science, categorized and alphabetized. A mnemonic is any technique that assists the human memory with information retention or retrieval by making abstract or impersonal information more accessible and meaningful, and therefore easier to remember; many of them are acronyms or initialisms which reduce a lengthy set of terms to a single ...
Rotavirus. A nucleic acid test (NAT) is a technique used to detect a particular nucleic acid sequence and thus usually to detect and identify a particular species or subspecies of organism, often a virus or bacterium that acts as a pathogen in blood, tissue, urine, etc. NATs differ from other tests in that they detect genetic materials (RNA or DNA) rather than antigens or antibodies.
Detection of viral RNA and DNA genomes can be performed using polymerase chain reaction. This technique makes many copies of the virus genome using virus-specific probes. Variations of PCR such as nested reverse transcriptase PCR and real time PCR can also be used to determine viral loads in patient serum.
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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 ]