Basically because it does not have the things required to BE a cell, which is considered to be an organism. A virus is not considered an organism. The virus has a core of RNA or DNA which is surrounded by a protein coat. Unlike cells that can either go through mitosis or binary fission, viruses cannot replicate itself unless it is in a host cell.
viruses don't have a nucleus, and scientists have a debate on if viruses are alive because they can't reproduce on their own, also viruses are smaller than cells
Viruses are not living because they require a host cell. All cells are living. Viruses are primarily a protein coat for protection and within is RNA or DNA. They are incredibly much smaller.
Virus hijacks cell's biochemical machinery to replicate it's own dna, because it can't replicate on it's own and it doesn't have metabolism, thus vuruses are not considered to be living organisms.
A virus isn't considered living because it isn't made up of cells and needs other cellular organisms to reproduce. It has its own set of DNA, but has no way of producing its own proteins and reproducing.
Viruses do not have a metabolic system of their own, they don't have a special body of their own but still are living species. they attack other cells (any other animal cell including human) and use the metabolic systems of the attacked cells to carry out its functions and to multiply. before attacking a cell a virus is just equivalent to dust particle.
Well, all viruses are not cells! Where did you get that question?
Because they are just a piece of RNA or DNA that injects its RNA or DNA into a host to produce more.
Virus are not considered as living or dead.They do not have organells.
Both a living cell and a virus contain nucleic acid. The virus has a capsid, whereas a living cell does not.
They have no metabolism, no cellular structure, and can not reproduce without a host cell. They are considered to straddle the line between "life" and "nonlife".
faeces
They are not alive. They are like cockle burrs that "grab" hold of your clothing or a dog's coat. They are hijackers. Once they get attached to the cell of a living cell, they can take it over and "make" the living cell produce virus particles instead of cell parts. These particles can assemble into more viruses and then they break out of the cell (killing it) and begin the process again. They cannot make more viruses on their own.
DNA is the fundamental living matter. A virus, considered to be a living matter consists of core of DNA. When this virus invades a Bacterial cell, it forms the Bacteriophase.DNA is the fundamental living matter. A virus, considered to be a living matter consists of core of DNA. When this virus invades a Bacterial cell, it forms the Bacteriophase.
Virus are not considered as living or dead.They do not have organells.
Both a living cell and a virus contain nucleic acid. The virus has a capsid, whereas a living cell does not.
Be more specific? Viruses can be considered pathogens, but they are not considered living because they do not obey the cell theory.
Viruses cannot reproduce. They use a living cell to replicate themselves. When a virus infects a living cell, it injects its genetic material (DNA or RNA) into the cell. The virus' genetic material takes control of the cell and turns it into a virus factory. The cell does nothing but manufacture and assemble virus parts until eventually the cell ruptures and the new viruses erupt and go on to infect more cells.
Since a virus can only replicate on a living cell, host cell, it wouldn't be able to reproduce.
A virus and a cell have to have matching "docking" proteins for the virus to invade. Otherwise the virus is blocked.
They have no metabolism, no cellular structure, and can not reproduce without a host cell. They are considered to straddle the line between "life" and "nonlife".
A virus does not have a metabolism. To reproduce, a virus takes control of a living cell, forcing the cell to make copies of the virus. All energy is provided by the cell.
Virus cannot considered living. They lack cellular organization
faeces
They are not alive. They are like cockle burrs that "grab" hold of your clothing or a dog's coat. They are hijackers. Once they get attached to the cell of a living cell, they can take it over and "make" the living cell produce virus particles instead of cell parts. These particles can assemble into more viruses and then they break out of the cell (killing it) and begin the process again. They cannot make more viruses on their own.