BIOL 151 Study Guide - Midterm Guide: Lytic Cycle, Lysogenic Cycle, Cytosol
Document Summary
Describe the lytic and lysogenic cycles: only deal with bacteriophages which infect viruses. Lytic: ends with lysis (destruction) of the host cell. Not expressed right away, triggered by molecular cues in the host that push the virus out of the replicative cycle (lytic) Prolongs infection and increases like likelihood that the virus will be transmitted to a new host. Doesn"t kill the host cell directly, replicates. And then can eventually enter the lytic cycle. Explain the steps involved in the hiv infection cycle, including the roles of: reverse transcriptase, protease, and integrase: hiv is a retrovirus they reverse-transcribe. Discuss approaches taken to cure aids (similar to the in-class activity: medicine that doesn"t allow reverse transciptase to work, makes protease to not work. Explain the difference between prions and viruses: prions: infectious proteins that can cause diseases. Does not contain rna or dna: viroids: small infectious rna molecules. Formed from a small single stranded circular rna.
