Hat are the differences between virus and bacteria?
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Viruses and bacteria are both capable of killing humans and ravaging human health. It is a very fair question. There are some subtle and not so subtle differences between a virus and a bacterium (the plural is bacteria).
A virus is an organism that contains no cells (acellular) whose genome consists of nucleic acid and that reproduce inside host cells. When they do this they use host metabolic machinery and ribosomes to form a pool of components which assemble into particles called virions. Virions serve to protect the genome and to transfer it to other cells. Viruses are distinct from other so-called virus-like agents such as viroids, plasmids, and prions. Other characteristics of viruses include: They do not breathe, move or grow. However, they most definitely reproduce and can adapt to new hosts.
A bacterium is any of the one-celled (unicellular) prokaryotic micro-organisms of the class Schizomycetes. These vary in terms of their form and structure (morphology), oxygen and nutritional requirements, and capability to move (motility). They may be free-living, saprophytic (obtaining food by absorbing dissolved organic material), or capable of causing disease (pathogenic) in plants or animals. But bacteria are essential for human health too. Bacteria in the intestine, for example, are vital for digestion.
A virus is an organism that contains no cells (acellular) whose genome consists of nucleic acid and that reproduce inside host cells. When they do this they use host metabolic machinery and ribosomes to form a pool of components which assemble into particles called virions. Virions serve to protect the genome and to transfer it to other cells. Viruses are distinct from other so-called virus-like agents such as viroids, plasmids, and prions. Other characteristics of viruses include: They do not breathe, move or grow. However, they most definitely reproduce and can adapt to new hosts.
A bacterium is any of the one-celled (unicellular) prokaryotic micro-organisms of the class Schizomycetes. These vary in terms of their form and structure (morphology), oxygen and nutritional requirements, and capability to move (motility). They may be free-living, saprophytic (obtaining food by absorbing dissolved organic material), or capable of causing disease (pathogenic) in plants or animals. But bacteria are essential for human health too. Bacteria in the intestine, for example, are vital for digestion.
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Bacteria are single-celled, prokaryotic microorganisms that exist in abundance in both living hosts and in all areas of the planet (e.g., soil, water). By their nature, they can be either "good" (beneficial) or "bad" (harmful) for the health of plants, humans, and other animals that come into contact with them. A virus is noncellular (has no cell structure) and requires a living host to survive; it causes illness in its host, which causes an immune response. Bacteria are alive, while scientists are not yet sure if viruses are living or nonliving; in general, they are considered to be nonliving.
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