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أختى الكريمة هذه معلومات عن الفرق بين البكتيريا والفيروسات .
There are a number of differences between a virus and bacteria, or more appropriately, viruses and bacteria, including their relative sizes, reproduction methods and resistance to medical intervention. Bacterium, the singular form of the word bacteria, is a one-celled living animal, with complete sets of both ribonucleic acid (RNA) and deoxyribonucleic acid (DNA) genetic codes. A virus is little more than a section of RNA or DNA covered by a protein shell. Bacterium, therefore, is at least a hundred times larger than a typical virus.
One major difference between viruses and bacteria is the method of reproduction. Bacterium is a completely self-contained and self-reproducing unit. When the time is right, bacterium will split its DNA and RNA genetic material in two. Separate cell walls will build up around these two new bacteria, and this process will continue until thousands or millions of bacteria have formed. This is how strains of bacteria survive in almost every environment on Earth, including non-living surfaces like rocks or plastic.
A virus, on the other hand, cannot reproduce without a living host. A virus may lie dormant for thousands of years before finally coming into contact with a suitable host. Once it enters the body of a host, a virus uses leg-like appendages to clamp onto a cell and a spike or chemical coating to penetrate the cell wall.
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