Viruses

By: Sean Fite

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Lytic Cycle

1. Attaches to the cell

2. Inserts DNA into the cell

3. Host DNA is digested

4. Virus DNA is replicated

5. Host cell makes virus proteins

6. Assembly of Viruses complete

7. Host Cell dies

Example: Bacteriophage

Lysogenic Cycle

1. Virus attaches to cell

2. Virus injects DNA

3. Virus becomes dormant

4. Virus DNA is replicated into different cells

5. The Virus becomes active and enters the Lytic Cycle

Example: Herpes

The Characteristics of Life

1. Growth and Develop. Viruses do Grow and Develop because they evolve over time, and they're always changing.

2. Universal Genetic Code. Viruses have DNA or RNA, they don't have both though, but they do have one or the other.

3. Respond to Enviornment. Viruses do Respind to the Enviornment, because they respond to the other things happening to the body around them.

4. Cells. Viruses don't have cells because they're not cellular, they aren't living things.

5. Reproduce. Viruses name reprodu on its own. They aren't living so therefore they can't reproduce.

6. Homeostasis. Viruses don't have homeostasis because they're not living. If they aren't living then they can't maintain homestasis.

7. Material and Energy. Viruses do have energy because they need energy to copy themselves into the DNA of the Host Cell

8. Evolve as a group. Viruses do evolve as a group because they are always changing and a

Ways rowing more dangerous than others.

Question 1: What is the Typical Structre of the Virus? What is a Virus made of? What biomolecules would you find in a Virus?

The basic structure of a virus has a protein coat, DNA or RNA and a Lipid Envelope. A virus has many components, it has a Protein Coat, it has DNA or RNA is has a Lipid Envelope, and it has Enzymes. Nucleic Acids can be found in the form of DNA or RNA in a virus.

Question 2: Discuss the different ways viruses enter the cell?

One way is to access the cytoplasm without destroying the host cell in the process. Another way is that they remain on the outside of the cell and attack when they are ready, they never enter the cell. On an Animals Cell the virus enters through the Lipid Bilayer. On a plant cell the Virus enters through the cell wall.

Question 3: Explain why the Ebola Virus would not infect a Tobacco Plant?

One of the reasons is because they are using tobacco plants as an Antibody for Ebola. They are using it as a vaccine for Ebola once you have it to hopefully cure yourself from it. The Tobacco Plant could be the cure to people who have Ebola so if Ebola enters the Tobacco plant then it would become destoryed immediately.

Question 4: Name 5 viruses and the type of cell they attack

The first virus is the Flu. The Flu attacks epithelial cells in the nose and the mouth. The second virus is Warts. Warts attack Squamos Cells. The third virus is the Common Cold. The Common Cold attacks your defensive cells. The fourth virus HIV. HIV attacks crucial immune cells, like the a helper T cell. The fifth virus is Smallpox. Smallpox attacks mouth, nose and resperitory cells.

Question 5: Yu have been infected with the flu. Explain why your doctor wouldn't give you any Antibiotics?

It's because Antibiotics don't do anything to Viral Infections. Antibiotics only help Bacterial Infections. Your immune suystem fights back against the invading viral disease.

Question 6: how is it a person can be infected with HIV but not show symptoms?

HIV is a viral infection that if Lysongenic. Meaning this particular virus can stay dormant for long periods of time before entering the Lytic Cycle and attacking you. Unit don't even know it's there because it's sneaky and can stay inactive for years and years at a time.