Exam (elaborations) GIZMOS Student Exploration: Virus Lytic Cycle (BIO132)
Student Exploration: Virus Lytic Cycle
Vocabulary: bacteriophage, capsid, host cell, lyse, lytic cycle, virus
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
1. A computer virus is a program tha...
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
1. A computer virus is a program that can copy itself and infect a computer without the
permission of the owner. How do you think a computer virus compares to a real
virus?
A computer virus infects a computer, and a real virus infects an organism. During an infection,
both types of viruses make copies of themselves so that more infections can occur. A computer
viruses disrupts the functions of a computer, while a real viruses destroys its host cells.
2. Have you ever been infected with a virus, such as the cold virus or flu virus? yes
3. If so, how did the virus affect you? The viruses affected me by giving me fevers
and congestions.
Gizmo Warm-up
A virus is a microscopic particle that can infect a cell.
Viruses are primarily composed of a protein coat,
called a capsid, and nucleic acid. In the Virus Lytic
Cycle Gizmo™, you will learn how a virus infects a
cell and uses the cell to produce more viruses.
1. Viruses are extremely small. A typical virus is
about 100 times smaller than a single cell, such
as a bacterium.
2. Bacteriophages are
viruses that infect
bacteria.
, Activity A: Get the Gizmo ready:
Lytic cycle If necessary, click Reset ().
Introduction: Unlike living organisms, viruses cannot reproduce on their own. Instead, viruses
infect host cells, taking over the cell’s machinery to produce more viruses. This process is
called the lytic cycle.
Question: What are the steps of the lytic cycle?
1. Observe: Use the navigation arrows on the DESCRIPTION tab to read about the stages
of the lytic cycle. Using your own words, summarize each step of the cycle.
Step Summary
A lytic bacteriophage virus attaches itself to a bacterial cell. The virus is
1 a very simple structure, composed of a protein capsid, nucleic acid, and
a tail section.
↓
The virus injects its nucleic acid into the cell. The nucleic acid uses the cell’s ribosome
2
↓
The virus capsid and tail, now useless, detach from the cell and disintegrate. Inside the
3
↓
4 The virus proteins and nucleic acid assemble into new viruses.
↓
Special proteins produced by the viral nucleic acid cause the host bacterial cell to lyse
5
(Activity A continued on next page)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller frackasaura. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.48. You're not tied to anything after your purchase.
