/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 11 Describe the temporal sequence o... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 8: Problem 11

Describe the temporal sequence of the bacteriophage life cycle.

Short Answer

Expert verified
Question: Briefly describe the temporal sequence of the bacteriophage life cycle, mentioning the key stages involved. Answer: The bacteriophage life cycle consists of five key stages: 1) Attachment, where the bacteriophage binds to a specific receptor on the bacterial host cell; 2) Injection of genetic material into the host cell; 3) Replication of the viral genetic material using the host cell's biochemical machinery; 4) Assembly of the individual viral components into new, complete bacteriophages; and 5) Release of the bacteriophages from the host cell generally through cell lysis.

Step by step solution

01

Attachment

The bacteriophage first attaches to the surface of the host bacterial cell using its tail fibers. Binding to a specific receptor site on the bacterial cell wall ensures that the bacteriophage only infects the target bacterial species.
02

Injection of Genetic Material

Once attached, the bacteriophage injects its genetic material, either DNA or RNA, into the host cell. This involves using the bacteriophage's tail structure to achieve a connection with the bacterial cell membrane, which then acts as a conduit for the passage of genetic material.
03

Genetic Material Replication

Within the host cell, the viral genetic material takes control of the bacterial cell's biochemical machinery, forcing it to produce nucleotides and proteins required for the replication of the bacteriophage's genetic material. This process is essentially hijacking the host cell for the purposes of creating new viral particles.
04

Viral Assembly

Once enough viral components have been synthesized, the next step is the assembly of these individual parts into new, complete bacteriophages. This might involve the formation of a capsid around the viral genetic material, as well as the development of tail fibers and other structural components necessary for infectivity.
05

Release of Bacteriophages

Finally, the newly assembled bacteriophages are released from the host cell. This generally occurs through cell lysis, in which the host cell's membrane is ruptured, allowing the new viral particles to escape and infect other bacterial cells. This process might be facilitated by the production of specific enzymes that weaken the bacterial cell wall, thus leading to cell lysis and the release of the new bacteriophages.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Attachment
Bacteriophages are viruses that specifically target bacterial cells. The first step in their life cycle is attachment. This involves the bacteriophage binding to the surface of a host bacterial cell. The bacteriophage uses its tail fibers to attach itself to specific receptor sites on the bacterial cell wall. This ensures that the virus only infects compatible bacterial species. The specificity of the receptors means that each type of bacteriophage is typically adapted to infect certain bacteria. This is akin to a lock and key mechanism, where the bacteriophage can only "unlock" and infect if it finds the right bacterial cell.
Genetic Material Injection
Once a bacteriophage has successfully attached to a bacterial cell, the next critical step is the injection of its genetic material. The virus uses its tail structure like a syringe to penetrate the bacterial cell membrane. Imagine it as a tiny hypodermic needle injecting the bacteriophage's DNA or RNA into the bacterial cell. This transfer of genetic material is essential as it kick-starts the next phase of the virus's life cycle. The bacteriophage essentially inserts its instructions into the host, setting the stage for taking over the cell鈥檚 machinery.
Viral Replication
After the bacteriophage鈥檚 genetic material has been injected into the bacterial cell, it hijacks the host's biochemical machinery. The host cell is manipulated to halt normal processes and instead, use its resources to replicate the viral genetic material. It's similar to a factory changing its production line to manufacture copies of the invader鈥檚 blueprints. This step transforms the bacterial cell into a production facility for new viral components necessary to create more bacteriophages.
Viral Assembly
With the host cell steadily producing the components of the bacteriophage, the step of viral assembly begins. This phase involves piecing together the replicated components into new, fully functional bacteriophages. Think of it as assembling a model car: all the individual parts are put together鈥攃apsid forming around the DNA or RNA, and tail fibers being attached鈥攖o form complete viruses. Each bacteriophage becomes equipped to infect more bacteria, perpetuating the cycle.
Cell Lysis
The final stage in the bacteriophage's life cycle is the release of newly assembled viruses from the host, a process known as cell lysis. To facilitate release, bacteriophages usually produce enzymes that break down the bacterial cell wall, causing the cell to burst open. This rupture releases the new bacteriophages into the surrounding environment where they can infect neighboring bacterial cells. It is a dramatic finish to the replication cycle, effectively sacrificing the host cell in the process. This stage is crucial as it spreads the infection to numerous other bacterial cells.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Explain the connection between plaque formation and lytic bacteriophage.

A plaque assay is performed beginning with \(1.0 \mathrm{mL}\) of a solution containing bacteriophages. This solution is serially diluted three times by taking \(0.1 \mathrm{mL}\) and adding it to \(9.9 \mathrm{mL}\) of liquid medium. The final dilution is plated and yields 17 plaques. What is the initial density of bacteriophages in the original \(1.0 \mathrm{mL} ?\)

Assume that one counted 67 plaques on a bacterial plate where \(0.1 \mathrm{ml}\) of a \(10-5\) dilution of phage was added to bacterial culture. What was the initial concentration of the undiluted phage?

Describe the execution of and rationale behind linkage and mapping studies of bacterial genes during transduction experiments.

Describe the mechanism of transformation.
See all solutions

Recommended explanations on Biology Textbooks

Substance Exchange

Read Explanation

Bioenergetics

Read Explanation

Ecosystems

Read Explanation

Reproduction

Read Explanation

Biological Molecules

Read Explanation

Plant Biology

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.