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Virus Module Set 6
| Question | Answer |
|---|---|
| T4 DNA contains | hydroxymethyl-cytosine (HMC) instread of cytosine |
| T4 DNA is synthesized by | two phage-encoded enzymes |
| T4 DNA is then | HMC glucosylated |
| HMC glucosylation protects | phage DNA from host restriction endonucleases |
| restriction endonucleases | enzymes that cleave DNA at specific sequences |
| use of restriction endonucleases as | a defense mechanism against viral infection |
| scaffolding proteins | aid in construction of procapsid |
| lysis of host brought about by | several T4 proteins |
| endolysin | attacks peptidoglycan |
| holin | produces lesion in cell membrane |
| lysogeny: | nonlytic relationship between a phage and its host |
| lysogeny usually involves | integration of phage genome into host DNA |
| prophage | integrated phage genome |
| lysogens | infected bacteria |
| temperate phages | phages able to establish lysogeny |
| lysogenic conversion | change in host phenotype induced by lysogeny |
| virion release of naked viruses | usually by lysis of host cell |
| virion release of envelope viruses | formation of envelope and release usually occur concurrently |