McGraw Hill 1. After entry of the bacteriophage into the host cell, a phage enzyme O breaks the viral capsid into fragments. O breaks down the host cell nuclear membrane. O activates host cell ribosomes. O breaks the host DNA into fragments.
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The question asks what a phage enzyme does after a bacteriophage enters a host cell. This is a question about the lytic cycle of bacteriophages. Show more…
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QUESTION 7 There is an accumulation of phage M13 particles in the infected culture supernatant during phage extrusion from the host cell. True False QUESTION 8 Which of the following describes the first step in the replication cycle of the phage φX174? a. Integration of the viral DNA into the host chromosome. b. Transcription of the viral DNA by the viral RNA polymerase. c. Translation of the viral genome into protein. d. Conversion of ssDNA into dsDNA. e. Transcription of the viral DNA by the cellular RNA polymerase. QUESTION 9 Which of the following was used to distinguish different bacteriophages before the development of the electron microscope in the 1930s? a. DNA restriction analysis b. DNA sequence c. Plaque morphology d. X-ray crystallography e. Western blot
Sri K.
The phage DNA is not hydrolyzed along with the host DNA because phage DNA contains an unrecognizable protected form of nucleic acid base: phage DNA remains outside the cell; protein sheath protects the phage DNA the host cell ceases to function lysozymes releases phage particles before hydrolysis can occur.
Suman K.
During a bacteriophage infection only the genetic information enters the host bacterium the entire bacteriophage enters the host bacterium the entire bacteriophage remains outside the host bacterium throughout the infection process copies of a bacterium are produced 2. If the virus pictured above was mixed with host cells and allowed to reproduce in a solution that contained 32P A. the virus proteins would become radiolabeled B. the virus DNA would become radio labeled C. the virus would be radiated and killed D. nothing would occur and no viral molecules would become radiolabeled 3. If the virus pictured above was not mixed with host cells but put in a solution that contained 32P A. the virus proteins would become radiolabeled B. the virus DNA would become radio labeled C. the virus would be radiated and killed D. nothing would occur and no viral molecules would become radiolabeled 4. If the virus pictured above was incubated with host cells in a media that contained 35S A. the virus proteins would become radiolabeled B. the virus DNA would become radio labeled C. the virus would be radiated and killed D. nothing would occur and no viral molecules would become radio labeled 5. At the start of the experiment above a solution containing E. coli bacterial cells is used. Choose the correct statement regarding these bacterial cells A. at the start of the experiment the bacterial cells are radiolabeled B. at the start of the experiment the bacterial cells are not radiolabeled C. the bacterial cells will be used as host cells for radiolabeled viruses D. Both b and c are correct
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