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18 Cards in this Set
- Front
- Back
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Viruses are not considered to be living things because no_______, no ________, no________ and not in any ______.
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no growth, no respiration, no movement and not in any kingdom
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Viruses can only reproduce within a host cell-this is known as being a
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obligate intracellular parasite
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Viruses cause diseases such as ________, ________ and __________
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mumps, measles and chicken pox
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Viruses are either made of ____ OR_______ (NOT BOTH!!!!!!!!!!!!!!!)
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DNA OR RNA
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Nucleic acids codes only for making _____ of the virus
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copies
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What is the outside of the vrius made up of and called?
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Protein, capsid
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____ of ____ ____ determines what cell the virus can infect
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Shape of the protein coat
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Most viruses can enter and reproduce in _____ _ _____ ______ __ _____
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only a few kinds of cells
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Name the 5 steps of the lyctic cycle
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1. Attachment
2. Entry(virus is injected) 3. Replication (host cell is destroyed and virus uses cell's material to make viral parts) 4. Assembly-new viruses are assembled 5. Release-host cell ruptures and new viruses are released |
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Lysogenic cycle: Viral ________ _____ is inserted into the host cell's DNA. This allows the viruse's info to be __________ along with the cells
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Viral nulceic acid, replicated
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This allows the virus's info to be replicated along with the cells )called a_________)
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provirus
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What phase can continue for many years?
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the provirus
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The __________ can at any time enter the lytic cycle and kill the __ __
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provirus can at any time enter the LYTIC CYCLE and kill the host cell
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A typical virus has a core composed of
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DNA or RNA
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The outer layer of a virus is composed of
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proteins
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An infection in which a virus makes copies of itslef and casues the host cell to burst is called
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lytic
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A lytic infection is quick or slow?
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Quick
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Why are viruses not considered to be living things?
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No respiration, growth, movement, and not classified in a kingdom
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