BIOL 171 Lecture Notes - Lecture 25: Lytic Cycle, Lysogenic Cycle, Mutation

• School: UH, UH Manoa, UHM
• Department: Biology
• Course: BIOL 171
• Professor: Gerhart- Barley

Document Summary

Viruses-not alive but a protein coated piece of dna!! All organisms have a membrane, cytoplasm, and dna. Viruses genome can consist of double or single stranded dna or rna. Some have a membranous envelope cannibalized from the host cell. Host range can be broad or very specific. The virus uses the cells dna transcription and replication system to reproduce its own dna. Lytic cycle: reproduction of bacterial phages in a cell. Lysogenic cycle: phage injects dna into where the dna incorporated into genome and gets reproduced until the cell restarts the lytic cycle. Retro virus: has rna and uses it to build dna(provirus) in a cell. Vaccines are a weakened or dead form of the disease which your body uses to form antibodies. How do new viruses arise: mutation from other forms of the virus. Hemoagglutinin: protein that helps them bind to the host cell. Neuraminidase: enzyme that helps release the virus particles from infected cells.