Chapter 13

What does a virus consist of?

DNA/RAN surrounded by a protien coat
What are the shapes of viruses?
- Isometric - equal sides
- Helical - kind of rod shaped
- Complex - Stop sign with legs
What is the lytic cycle?
- When a virus is "alive."
- Example: When you have a cold sore.
What is the latent cycle?
- When the virus is inert or dormant.
- Example: when you don't have a cold sore.
What are the 6 steps of the lytic cycle?
- Absorption
- Penetration
- Transcription/Translation
- Replication
- Assembly (or maturation)
- Release
What happens during attachment?

The virus attaches to the bacteria
What happens during penetration?

The virus or its nucleic acid enters the cell.
What happens during Transcription/Replication?

Duplication of viral components
What happens during assembly?

Replicated viral components become a mature virus
What happens during release?

Host cell bursts and releases virus's to the environment
What is masking?

When a virus uses part of the old cells membrane as its envelope, in order to look like the host cell.
What is Lysogeny?
- Replication of a temperate virus
- (non-productive cycle)
What is incorporation?
- When the DNA/RNA of the virus incorporates into the host chromosome
- DNA only replicates when the host replicates
What is lysogenic conversion?

When the virus confers new properties on to the cell

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Chapter 13

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Chapter 13

Updated

2010-05-19T22:03:44Z

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