In humans coronaviruses can cause potentially lethal. Although they may seem like living organisms because of their prodigious reproductive abilities viruses are not living organisms in the strict sense of the word.
Viruses are not plants animals or bacteria but they are the quintessential parasites of the living kingdoms.
Virus molecule drawing. Coronaviruses possess an unusual large rna genome as well as a unique replication strategy. These virus molecules have large capsules surrounded by cell membrane and proteins. Coronaviruses cause a variety of diseases in animals ranging from cows pigs to chicken and other birds.
Viruses come in an amazing variety of shapes and sizes. They are very small and are measured in nanometers which is one billionth of a meter. The club like spikes projecting out from their surface gave them the name.
This doesn t mean that whitney overlooked molecular visualization however. Coronaviruses covs are enveloped positive sense rna viruses. When the virus approaches a cell its membrane proteins bind with the cell and it is drawn into the cytoplasm.
Whitney s drawing of a coronavirus molecule binding to a healthy cell is two dimensional and highly stylized. It s easy to understand like a graphic from an ap biology textbook. These virus molecules contain a rna polymerase molecule which can read in reverse.
Viruses can range in the size between 20 to 750nm which is 45 000 times smaller than the width of a human hair. Structure of a virus is made up of a genetic information molecule and.
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