Question

Please select the TRUE statement regarding bacteriophage life cycles. 1 Temperate phages lyse their host cells, whereas lytic phages either lyse their host or integrate their DNA into the host cell's genome. 2 Lytic phages lyse their host cells, whereas temperate phages either lyse their host or integrate their DNA into the host cell's genome. 3 In the bacteriophage life cycle, the entire virus enters the host bacterial cell through a hole in the cell wall. 4 Phage particles seek out their bacterial hosts by means of chemotaxis and then attach to random receptors on the host's cell wall. Question 17 An antibiotic is added to a culture of E. coli, resulting in death of the cells. Bacteriophages specific to E. coli are then added. Would the phages replicate in the E. coli cells? Why or why not? 1 Yes, because the cellular machinery of the bacteria is most likely still active. The bacteriophages could use that machinery to replicate new virus particles. 2 No, because the bacteriophages depend on having the active machinery of a living host cell for replication. 3 Yes, because bacteriophages are capable of reanimating dead cells to force them to produce more virus particles. 4 No, because bacteriophages typically infect viruses, not bacteria.

          Please select the TRUE statement regarding bacteriophage life cycles.
1 Temperate phages lyse their host cells, whereas lytic phages either lyse their host or integrate their DNA into the host cell's genome.
2 Lytic phages lyse their host cells, whereas temperate phages either lyse their host or integrate their DNA into the host cell's genome.
3 In the bacteriophage life cycle, the entire virus enters the host bacterial cell through a hole in the cell wall.
4 Phage particles seek out their bacterial hosts by means of chemotaxis and then attach to random receptors on the host's cell wall.
Question 17
An antibiotic is added to a culture of E. coli, resulting in death of the cells. Bacteriophages specific to E. coli are then added. Would the phages
replicate in the E. coli cells? Why or why not?
1 Yes, because the cellular machinery of the bacteria is most likely still active. The bacteriophages could use that machinery to replicate new
virus particles.
2 No, because the bacteriophages depend on having the active machinery of a living host cell for replication.
3 Yes, because bacteriophages are capable of reanimating dead cells to force them to produce more virus particles.
4 No, because bacteriophages typically infect viruses, not bacteria.

Please select the TRUE statement regarding bacteriophage life cycles.
1 Temperate phages lyse their host cells, whereas lytic phages either lyse their host or integrate their DNA into the host cell's genome.
2 Lytic phages lyse their host cells, whereas temperate phages either lyse their host or integrate their DNA into the host cell's genome.
3 In the bacteriophage life cycle, the entire virus enters the host bacterial cell through a hole in the cell wall.
4 Phage particles seek out their bacterial hosts by means of chemotaxis and then attach to random receptors on the host's cell wall.
Question 17
An antibiotic is added to a culture of E. coli, resulting in death of the cells. Bacteriophages specific to E. coli are then added. Would the phages
replicate in the E. coli cells? Why or why not?
1 Yes, because the cellular machinery of the bacteria is most likely still active. The bacteriophages could use that machinery to replicate new
virus particles.
2 No, because the bacteriophages depend on having the active machinery of a living host cell for replication.
3 Yes, because bacteriophages are capable of reanimating dead cells to force them to produce more virus particles.
4 No, because bacteriophages typically infect viruses, not bacteria.

Added by Kristen R.

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