In the lytic cycle of a bacteriophage the host membrane ruptures, releasing many phages. the host sequesters viral particles in the lysosome. viral DNA incorporates into the host genome. the viral genome replicates without destroying the host.
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- Figure 21.10 Which of the following statements is false? In the lytic cycle, new phages are produced and released into the environment. In the lysogenic cycle, phage DNA is incorporated into the host genome. An environmental stressor can cause the phage to initiate the lysogenic cycle. Cell lysis only occurs in the lytic cycle.In _______, viral DNA becomes integrated into a bacterial chromosome and is passed to descendant cells. a. binary fission c. the lysogenic pathway b. the lytic pathway d. conjugationThe genome of a virus consists of (a) DNA (b) RNA (c) prions (d) DNA and RNA (e) DNA or RNA
- Which statement is true? a. A virion contains DNA and RNA. b. Viruses are acellular. c. Viruses replicate outside of the cell. d. Most viruses are easily visualized with a light microscope.Some phages have a modified replication cycle in which infected host cells continue to grow and reproduce normally. In this cycle the phage DNA incorporates into the bacterial DNA. The integrated virus is called a ________________. And the cycle is known a ____________________or ________________.Why would viral genome integration into host cell integration be advantageous to a virus? It enables the virus to kill the cell. It allows the virus to infect cells it would not normally infect. It allows the virus to be passed on to future generations of host cells. It allows the virus to destroy the host cell's DNA. It speeds up viral replication.
- Influenza viruses use to replicate its genome whereas retroviruses use before they can integrate their genome into the host DNA. A. reverse transcriptase; RNA dependent RNA polymerase B. RNA dependent RNA polymerase; reverse transcriptase C. replicase; DNA polymerase D. DNA polymerase, replicaseThe lytic pathway of a virus is characterized by viral DNA is incorporated into the host chromosomes. extensive transcription of viral DNA destruction of the host. Both a and b. Both b and c.All viruses have which components in their infectious particles? Nucleic acids and protein coats Nucleic acids, protein coats, and membranes Nucleic acids, protein coats, and ribosomes Protein coats only
- A viral mutation that causes changes in the glycoprotein spikes would affect which aspect of the virus? The virus would become lysogenic and incorporate its genome into the host cell genome. The virus would enter the host by a combination of endocytosis and fusion. The virus would lose its viral envelope and become a naked virus. The virus would attach to different host cells and its host range would be altered. The viral genome would not require uncoating once inside the host cell.Which enzyme copies HIV’s genetic material, forming DNA?a. DNA polymerase from the host cellb. Reverse transcriptase from the virusc. RNA polymerase from the host celld. Coat protein from the virusproduce a diagram of the replication of a viral genome of stranded RNA simple [+] and mRNA production via Reverse Transcriptase. Produce a diagram of the replication and early maturation of a virus wrapped Produce a diagram of the replication and early maturation of a virus naked. Produce a diagram of the release of an enveloped virus by budding.