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Worksheet 8
Read Chapters 18, 19 and 20 in the textbook.
1. http://highered.mcgraw-hill.com/olcweb/cgi/pluginpop.cgi?it=swf::535::535::/sites/dl/free/0072437316/120080/bio26.swf::The Tryptophan Repressor
What is an operon? What is a repressor?
2. http://highered.mcgraw-hill.com/olcweb/cgi/pluginpop.cgi?it=swf::535::535::/sites/dl/free/0072437316/120080/bio27.swf::Combination of Switches - the Lac Operon
What happens when glucose is present? What happens when glucose is absent and lactose is present?
3. What are oncogenes? What are proto-oncogenes?
4. http://www.youtube.com/watch?v=vi-zWoobt_Q
What are steps of gene regulation in eukaryotes?
5. http://www.sumanasinc.com/webcontent/animations/content/hiv.html
What does reverse transcriptase do?
6. http://www.pbs.org/wgbh/pages/frontline/aids/cron/
Click through the timeline. When was the HIV virus discovered?
What was the treatment breakthrough in 1995?
7. http://dnalc.org/resources/animations/pcr.html
What are the steps of PCR, Polymerase Chain Reaction?
8. http://www.pbs.org/wgbh/harvest/engineer/transgen.html
Make a transgenic crop. What are the steps?
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