what does a virus need to survive?
492856
a host.\n\nA virus is a submicroscopic parasitic particle that infects cells in biological organisms. The study of viruses is virology.\n\nViruses are obligate intracellular parasites that lack the cellular machinery for self-reproduction. Viruses infect eukaryotes and prokaryotes such as bacteria; viruses infecting prokaryotes are also known as bacteriophages or phages. Typically viruses carry a small amount of genetic material, either in the form of DNA or RNA or both, surrounded by some form of protective coat consisting of proteins, lipids, glycoproteins or a combination. The viral genome codes for the proteins that constitute this protective coat, as well as for those proteins required for viral reproduction that are not provided by the host cell.\n\nViruses are non-living particles that can only reproduce when an organism reproduces the viral RNA or DNA. Viruses are considered non-living by the majority of virologists because they do not meet all the criteria of the generally accepted definition of life. Among other factors, viruses do not move or metabolize on their own. However, a comprehensive definition of life is still somewhat elusive since some bacteria (considered living) like rickettsia exhibit both characteristics of living and non-living particles.\n\n\nLife cycle\nAttachment, sometimes called adsorption: The virus attaches to receptors on the host cell wall. \nInjection: The nucleic acid of the virus moves through the plasma membrane and into the cytoplasm of the host cell. The capsid of a phage, a bacterial virus, remains on the outside. In contrast, many viruses that infect animal cells enter the host cell intact. \nTranscription: Within minutes of phage entry into a host cell, a portion is transcribed into mRNA, which is then translated into proteins specific for the infecting phage. \nReplication: The viral genome contains all the information necessary to produce new viruses. Once inside the host cell, the virus induces the host cell to synthesize the necessary components for its replication. \nAssembly: The newly synthesized viral components are assembled into new viruses. \nRelease: Assembled viruses are released from the cell and can now infect other cells, and the process begins again. \nWhen the virus has taken over the cell, it immediately causes the host to begin manufacturing the proteins necessary for virus reproduction. Some viruses, like herpes, cause the host to produce three kinds of proteins: early proteins, enzymes used in nucleic acid replication; late proteins, proteins used to construct the virus coat; and lytic proteins, enzymes used to break open the cell for viral exit. The final viral product is assembled spontaneously, that is, the parts are made separately by the host and are joined together by chance. This self-assembly is often aided by molecular chaperones, or proteins made by the host that help the capsid parts come together.\n\nThe new viruses then leave the cell either by exocytosis or by lysis. Envelope-bound animal viruses cause the host's endoplasmic reticulum to make certain proteins, called glycoproteins, which then collect in clumps along the cell membrane. The virus is then discharged from the cell at these exit sites, referred to as exocytosis. On the other hand, bacteriophages must break open, or lyse, the cell to exit. To do this, the phages have a gene that codes for an enzyme called lysozyme. This enzyme breaks down the cell wall, causing the cell to swell and burst. The new viruses are released into the environment, killing the host cell in the process
359498
A virus (not bacteria) is made up primarily of DNA and a protein coat.  They invade the cells of a living organism and destroy the host's DNA, then inject their own DNA into the host cell.  The result is that the infected cell produces new viruses which then exit the host cell and are released to infect others.  This is done because viruses do not contain cells with the orrganells and compounds necessary to reproduce, so they must get cells from the host to do the work for them.  Of course, the host cell is no longer functional as an intact cell once the virus leaves.
82940
Instead of going on and on like most people who commented here,I will provide you a simple answer to your question.\nHow do you kill a virus or any type of disease? Same principle here.You must systematically,completely,and totally obliterate it from the host.A long and expensive proposition,I know.I'll make anyone who's listening out there a deal;\nif you or your organization will pay for it,my team and I will get started.Try me...
329724
Actually a virus does exists on its own but is attached to a file.\nQuarantine option block that infected file so that it cannot to opened. If that file is opened, the virus will get to work so that file should be blocked. We cannot delete that file because, that file may be important. So ur antivirus may be updated so that afterward, the quarantine file may be repaired...
662148
they need water to survive. osmosis i steh entrance of the water into the cell and out of the cell. without water, the cells would all shrivel, it is the water that keeps them puffed and also sometimes burst them.
100523
Viruses are created by people who think it's fun to ruin everyone's computers.  They catch a flaw in the system and create a virus to capitalize on that flaw.  I don't think viruses can be completely eliminated, as there will always be virus creaters -- and they are quite smart.
154195
Well, no, it is not required, but it sure is nice to have.\n\nA virus getting into your computer can do some real damage and cause a lot of problems, possibly causing the loss of important files.  If you dont have one, your almost asking for trouble.  Having (and using) anti-virus software, although it wont prevent it 100% of the time, is just a good idea.
254313
Non-living\n\nA virus is a submicroscopic obligatory parasitic particle that infects cells in biological organisms. Viruses are "non-living particles" that can only replicate when an organism reproduces the virulent RNA or DNA.
380054
like others have said parasites are definately living things.  I didn't know there was even a debate as to whether virus are living things, I thought it was pretty much agreed upon that they are.  I guess it depends on your definition of life, which is something that's a hotly debated issue.  I don't think there is a clear cut answer myself as far as what should be considered a life form and what shouldn't.
721759
Quite simple really. viruses can reproduce only inside a living cell.but bacteria can reproduce outside too .\n\nbut it depends what you are  talking about .you'll have to consider the temperature and pH conditions .viruses can survive higher temperatures than bacteria.
344264
HIV virus cannot survive for more then a 20-40 seconds in open air, dont be afraid just start ur cleaning work
65045
A virus is a microscopic parasite that infects cells in biological organisms. Viruses are obligate intracellular parasites; they can reproduce only by invading and controlling other cells as they lack the cellular machinery for self-reproduction. The term virus usually refers to those particles that infect eukaryotes (multi-celled organisms and many single-celled organisms), whilst the term bacteriophage or phage is used to describe those infecting prokaryotes (bacteria and bacteria-like organisms lacking a nucleus). Typically these particles carry a small amount of nucleic acid (either DNA or RNA, but not both) surrounded by some form of protective coat consisting of proteins, lipids, glycoproteins or a combination. Importantly, viral genomes code not only for the proteins needed to package its genetic material, but for proteins needed by the virus during its life cycle (the term "life cycle" is used loosely here—see #Living or non-living?).
462681
A virus particle, known as a virion, is little more than a gene transporter, consisting at the most basic level of a genome contained within a protective casing of protein.These structures can range in size from less than 20 nanometers up to 400 nanometers. you need an electron microscope to see them, and in many cases you can only see their shadow, or figure.Remember that viruses cannot reproduce on their own.Viruses are non-living particles and can only replicate when an organism reproduces the viral RNA or DNA. Viruses are considered non-living by the majority of virologists because they do not meet all the criteria of the generally accepted definition of life.
653830
A virus is a submicroscopic parasitic particle that infects cells in biological organisms. The study of viruses is virology.\n\nViruses are obligate intracellular parasites that lack the cellular machinery for self-reproduction. Viruses infect eukaryotes and prokaryotes such as bacteria; viruses infecting prokaryotes are also known as bacteriophages or phages. Typically viruses carry a small amount of genetic material, either in the form of DNA or RNA, but not both, surrounded by some form of protective coat consisting of proteins, lipids, glycoproteins or a combination. The viral genome codes for the proteins that constitute this protective coat, as well as for those proteins required for viral reproduction that are not provided by the host cell.\n\nViruses are non-living particles that can only replicate when an organism reproduces the viral RNA or DNA. Viruses are considered non-living by the majority of virologists because they do not meet all the criteria of the generally accepted definition of life. Among other factors, viruses do not move or metabolize on their own. However, a comprehensive definition of life is still somewhat elusive since some bacteria (considered living) like rickettsia exhibit both characteristics of living and non-living particles.
846739
It can be either (a) or (b) or (d). This depends on how the strong the cell is or how conducive is that cell for that virus. (e) is not possible because virus and bacteria are two different organisms. Virus is much more smaller than bacteria.
258727
What the hell are you all talking about, ofcourse viruses are living - and they do reproduce by replication within your body cells.\nViruses dont decay, they actually mutate, so if someone in your family has a cold, and you don't and you're like "hey i dont have your cold" - the chances are that you already acquired it some time before and your memory cells remember the virus and so fight it off. So the next cold you get, will be another mutated cold. Viruses can also lay dormant, like the tetanus virus, which lays dormant in soil - which is why you get a tetanus shot if you cut yourself.
941686
C. \n\nIf a strain is resistant to one drug, and it survives to proliferate in the presence of only that drug, a larger population of the virus with that resistance will be produced to infect other cells and pass on the resistance. However, If that single-resistant virus has to contend with a different drug's mechanism, it has no defense that will allow it to proliferate. In the case of being infected with two or more strains of the same virus, a spectrum of drugs (cocktail) is used to defend against multiple resistance mechanisms. With each additional drug in the cocktail, the likelyhood of the virus mutating such that it can defeat all of those defense mechanisms decreases.