Hey, everyone. Let's take a look at this question together. What happens when a bacteriophage enters lysogen? Is it answer choice. A, a bacteriophage immediately destroys its host upon infection. Answer choice. B A bacteriophage injects its RN A into bacteria to hijack cellular machinery. Answer choice C A bacteriophage inserts its DNA into bacteria and stays inactive or answer choice. D A bacteriophage multiplies inside its hosts without killing them. Let's work this problem out together to try to figure out which of the following answer choices best explains what happens when a bacteriophage enters lysogen. So in order to solve this question, we have to recall what we have learned about what Liso Johnny is to determine which of the following answer choices best explains what happens when a bacterial phage enters liso gy. And we can recall that the term liso refers to one type of life cycle that some viruses follow in which they integrate their genetic material within the host. And in the case of a bacterial page entering lysogen, we know that the bacterial phage infects a bacterial cell by injecting its genetic material inside of that cell, which the injected genetic material is then integrated with the host cell and is called a prophage, which then the prophage lies dormant until activated under certain circumstances. Therefore, when a bacterial page enters liso gy, the bacterial page infects that bacterial cell by injecting its genetic material inside of the cell. And then the injected material called prophage lies dormant until activated under certain circumstances. So looking at our answer choices, we can identify that answer. Choice. C is the correct answer. As answer choice C says when a bacterial phage enters liso gy, the bacterial page inserts its DNA into bacteria and it stays inactive, which does describe what happens when a bacterial page enters liso Youy and all other answer choices are incorrect. I hope you found this video to be helpful. Thank you and goodbye.

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1. Introduction to Microbiology3h 21m
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3. Chemical Principles of Microbiology3h 38m
4. Water1h 28m
5. Molecules of Microbiology2h 23m
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18. Viruses, Viroids, & Prions

Bacteriophage: Lysogenic Phage Infections

Microbiology

18. Viruses, Viroids, & Prions

Bacteriophage: Lysogenic Phage Infections

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2:26 minutes

Problem 13.8aBauman - 6th Edition

Textbook Question

Describe lysogeny.

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Lysogeny is a process where a bacteriophage (a virus that infects bacteria) integrates its genetic material into the host bacterium's genome.

The integrated viral DNA, known as a prophage, is replicated along with the host cell's DNA during cell division.

During lysogeny, the prophage remains dormant and does not cause harm to the host cell, allowing the virus to persist in the host for extended periods.

Environmental triggers or stressors can induce the prophage to exit the lysogenic cycle and enter the lytic cycle, where it becomes active and begins to produce new virus particles.

This switch from lysogeny to the lytic cycle results in the destruction of the host cell as new phages are released.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Lysogeny

Lysogeny is a viral replication cycle in which a bacteriophage integrates its genetic material into the host bacterium's genome, forming a prophage. This process allows the virus to remain dormant within the host cell, replicating along with the host's DNA during cell division. Unlike the lytic cycle, where the virus immediately takes over the host's machinery to produce new virions, lysogeny can persist for generations without causing immediate harm to the host.

Prophage

A prophage is the dormant form of a bacteriophage that has integrated its DNA into the bacterial chromosome. This integration allows the viral genetic material to be replicated alongside the host's DNA during cell division. The prophage can remain inactive for long periods, but it can be induced to enter the lytic cycle under certain conditions, leading to the production of new viral particles and eventual lysis of the host cell.

Induction

Induction is the process by which a prophage is activated to enter the lytic cycle from its lysogenic state. This can occur due to various environmental factors, such as stress or damage to the host cell, which trigger the viral genome to excise itself from the bacterial chromosome. Once induced, the bacteriophage begins to replicate, leading to the assembly of new virions and the eventual lysis of the host cell, releasing the new viruses into the environment.

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