This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Bacteria have defenses against phages, including enzymes that recognize and cut up phage DNA The lysogenic cycle replicates the phage genome without destroying the host The viral DNA molecule is incorporated into the host cells chromosome: prophage Every time the host divides, it copies phage DNA and passes copies to daughter cells Prions are slow-acting, virtually indestructible infectious proteins that cause brain diseases in mammals Prions propagate by converting normal proteins into the prion version Mad cow disease, scrapie Transduction Transformation and Conjugation are all mechanisms for genetic transfer in bacteria: In the process known as transduction , phages carry bacterial genes from one host cell to another Transformation is the uptake of naked, foreign DNA from the surrounding environment Conjugation is the direct transfer of genetic material between bacterial cells that are temporarily joined...
View Full Document
This note was uploaded on 02/28/2008 for the course EBIO 1210 taught by Professor Demmig-adam during the Fall '07 term at Colorado.
- Fall '07