1. Viruses in BioTech
Viruses
Viral Vector
Retroviruses
Gene Therapy

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3. Viruses __________________
In addition to the capsid, some viruses are surrounded by an envelope.
The envelope is created when a virus leaves a host cell and part of the host cell membrane wraps around the virus.

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5. Retrovirus Replication
Using the cell’s supply of materials, the reverse transcriptase copies the viral RNA to make a complementary molecule of single-stranded DNA
The reverse transcriptase then directs the synthesis of a second DNA strand that is complementary to the first strand.
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Retrovirus Replication

7. The Use of Viruses as Vectors
This ability …………
For example, the human gene for insulin has been inserted into the nucleus of safflower seeds. __________________
Maybe we could also insert that gene into a diabetic and cure them of diabetes!

8. Viral Vector
A viral vector is a virus that is used to transfer the DNA from a donor to a host.
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Researchers remove the ………….

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11. Your Task
Describe the process that is used by retroviruses to replicate their genetic material.