Viruses
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is the structure of viruses? | DNA/RNA + Capsid (protein coat surrounding and protecting genetic material)
*occasionally an envelope of lipids surround the capsid
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| How do viruses reproduce? | They have 2 types of replication cycles:
Lyptic Cycle
Lysogenic Cycle
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| What is the lytic cycle? | Virus attaches to a cell
Penetrates cell membrane and injects DNA or RNA into cell
Host cell replicates the genetic material of the virus
Host cell makes new capsids, and viral particles
Host cell lyses (breaks open)
New viruses leave the cell
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| What is the lysogenic cycle? | Viral DNA becomes part of the host cell’s chromosomes
The infected cell has viral genes permanently!
The viral DNA that has now become part of the host chromosome is called a provirus
The viral genes can be activated right away or later on
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| What are prions? | just proteins
NO RNA or DNA
diseases result when they change their shape to go from normal to harmful
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| How can viruses be used? | To make a copy of a gene, insert it into a virus and have the host cell copy the gene
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| How are viruses classified? | not classified with living things
based on:
size and shape of capsid
type of disease caused
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| What are the impacts of viruses? | cause diseases
used in biotechnology
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Created by:
Jtboner
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