1. Lytic phages lyse their host cells, whereas temperate phages either lyse their host or integrate their DNA into the host cell’s genome. Prophage DNA often codes for gene products that confer new properties on the host. Filamentous single-stranded DNA phages are extruded from the host cells without killing the cell. How can a productive phage infection not kill a host cell?
Added by Miguel -Ngel H.
Step 1
These phages extrude their progeny from the host cell without causing lysis. This allows the host cell to continue living while the phage replicates and assembles new virions. This process is known as a "budding" or "extrusion" mechanism. Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 71 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Please select the TRUE statement regarding bacteriophage life cycles. Temperate phages lyse their host cells, whereas lytic phages either lyse their host or integrate their DNA into the host cell's genome. Lytic phages lyse their host cells, whereas temperate phages either lyse their host or integrate their DNA into the host cell's genome. In the bacteriophage life cycle, the entire virus enters the host bacterial cell through a hole in the cell wall. 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? Yes, because the cellular machinery of the bacteria is most likely still active. The bacteriophages could use that machinery to replicate new virus particles. No, because the bacteriophages depend on having the active machinery of a living host cell for replication. Yes, because bacteriophages are capable of reanimating dead cells to force them to produce more virus particles. No, because bacteriophages typically infect viruses, not bacteria.
Adi S.
Phages that destroy host cell DNA, direct synthesis of phage particles, and cause lysis of the host cell are called: (a) Temperate phages (b) Prophages (c) Lysogenic phages (d) Virulent phages (e) Transductions
1. Viruses cannot reproduce on their own, without the help of a living cell. Explain the basics of how viruses make more viruses. 2. What type of virus infects bacteria? how do you enter this virus to the host bacteria and reproduces? How does it get out of the bacteria? 3. Explain the difference between lytic replication and lysogeny. 4. Compare and contrast the intracellular and extracellular state of a bacteriophage. 5. How do animal viruses enter their host and reproduce? How leave the host cell? 6. Compare and contrast the intracellular and extracellular state of an animal virus. 7. What is transduction? Explain the role of bacteriophages and their host bacteria in this form of horizontal gene transfer.
Madhur L.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD