chapter 19 weinstein

chapter 19 weinstein - Chapter 19 Viruses Viruses: not...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Chapter 19 Viruses Viruses: not alive extremely small simple genomes obligate intracellular parasites infect all forms of life host range - cells that virus can infect strategy: reprogram cell to replicate viruses Fig. 19.4 - Viral Structure Bacterial viruses ( phage ) double stranded DNA genomes Lytic phage: lyse cells cycle lasts 20 min, 100 viruses produced bacteria double in 20 min viral replication rapidly outpaces bacterial replication Figure 18.6 The lytic cycle of phage T4
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Bacterial viruses ( phage ) double stranded DNA genomes Lytic phage: lyse cells cycle lasts 20 min, 100 viruses produced bacteria double in 20 min viral repl. rapidly outpaces bacterial repl. Temperate phage : Lytic or Lysogenic lifestyle Prophage - viral genome integrated into host genome Fig. 19.6 - Lysogenic and Lytic cycles Temperate phage most prophage genes are inactive repressor gene (encoded by virus) is active repressor protein shuts off other viral genes inactivate repressor --> excision, lytic cycle
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/29/2010 for the course BIO 113 taught by Professor Swenson during the Fall '08 term at Ohio State.

Page1 / 5

chapter 19 weinstein - Chapter 19 Viruses Viruses: not...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online