BSC 114 Chapter Notes - Chapter 19-24: Transposase, Circular Rna, Dna Replication
Document Summary
Viruses cannot reproduce or carry out metabolism outside of a host cell. Virus: an infectious particle consisting of little more than genes packaged in a protein coat. A virus consists of a nucleic acid surrounded by a protein coat. Capsomeres: the individual protein subunits making up the capsid. Host range: each virus can infect cells of only a limited # of host species. Page 395 how viruses use host cells to replicate. Lytic cycle: a phage replicative cycle that culminates in death of host cell (page. Virulent phage: a phage that replicates only by a lytic cycle. Restriction enzymes: restricts the ability of a phage to replicate within the bacterium. Lysogenic cycle: allows the replication of the phage genome without destroying the host. Temperature phages: phages capable of using either cycle to replicate. Reverse transcriptase: transcribes an rna template to dna. Provirus: integrated viral of dna, a permanent resident of the cell now.