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Transposons and Viruses
Biology 200 Lecture Notes
6
Biology
Undergraduate 2
08/16/2011

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Term
What are transposons?
Definition
- Mobile genetic elements are pieces of DNA that code for proteins necessary to move that DNA.
- Evolved through associations between repeated sequences and enzymes like retrotranscriptase and topoisomerase (integrase activity).
- Can create mutations by inserting into genes or promoters.
Term
What are viruses?
Definition
- Acellular organisms made of a single-type nucleotide genome which is usually single-stranded; a protein packaged shell.
Term
How do some viruses travel to other cells?
Definition
- They create further structures called virions.
Term
What can viruses not do?
Definition
- Make ATP; synthesize proteins without host machinery.
Term
HIV: Targets and Regulation
Definition
- HIV displays virion proteins that interact with T-cell membrane proteins specifically.
- HIV has evolved precise regulation to increase transcription when T-cells are most active.
Term
What is an effective treatment for HIV and how?
Definition
Protease inhibitors stop a key step in the life cycle of HIV.
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