Life ScienceMs. GonzalezChapter 7, Part 1 Viruses, Bacteria, Protists, and FungiNotesVirusesWhat Are the Characteristics of Viruses?...
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Virus Shape•Viruses vary widely in shape.•They can be:1.Round2.Rod-shaped3.Shaped like Bricks, threads, or bullets4.Robot like shapes(bacteriophage)
•ABacteriophageis a virus that affects bacteria. Its name means “Bacteria eater”.Virus “Fun” Facts•Viruses areSmallerthan cells and cannot be seen with the microscopes we use at school. The averagevirus is smaller than aBacteria•Because viruses are not considered living organisms, scientists do not use the two-part scientific namingsystem to identify them. Some viruses are named after theDiseasethey cause(_______________________); others are named for the _______________ where they were discovered(the _______________________________________).How Viruses Multiply1.Virus attaches to ahost cell.2.It enters the cell.3.Once inside the cell, the virus’sgenetic materialtakes over many of the cell’s functions.4.It instructs the cell to produce the virus’sproteinand genetic material.5.These newly produced proteins and genetic material then assemble into newviruses6.Some viruses take overcell functionimmediately, other viruses wait for a while.The Structure of Viruses•Although viruses have many different shapes and sizes, they all have a similar structure.•All viruses have two basic parts:1.Aninner corecontaining genetic material.2.Aproteinthatprotectsthe virus.