Cells vs Viruses

Rachel Gray

1. Virus and Cell Pictures

2. Virus Reproduction Diagram

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An example of a virus that uses the lytic cycle as a form of reproduction is a Bacteriophage.

An example of a virus that uses the lysogenic cycle as a form or reproduction is a Bacteriophage. Bacteriophages can reproduce using both cycles.

3. Characteristics of Life

Viruses and Characteristics of Life

Living things can grow and develop- Viruses do not need to develop.

Living things are based off of a universal genetic code- Viruses have DNA/RNA.

Living things respond to their environment- Viruses do not move.

Living things reproduce- Viruses cannot reproduce without a host cell.

Living things are made of cells- Viruses are not made of cells.

Living things use energy- Viruses do not eat.

Living things, as a group, evolve- Viruses can evolve through mutation.

Living things can maintain an internal balance- Viruses are fairly balanced.

4. Questions

1. Describe the typical structure of a virus. What is a virus made of? What biomolecules would you find in a virus?

1a. The typical structure of a virus consists of a capsule surrounding the virus, and sometimes and envelope for stronger support. The virus also has either DNA or RNA depending on its contents.

1b. A virus is made up of a core of genetic material, either DNA or RNA, surrounded by a protective coat called a capsid which is made up of protein.

1c. The biomolecule you would find in a virus is nucleic acid because viruses have DNA or RNA but neither both at the same time.

2. Discuss the different ways viruses gain entry into a cell.

There are many different ways viruses gain entry into a cell. One way is they just walk right in using a disguise of course. The virus uses an envelope that is made of the same material as the host cell they are tying to penetrate, so that the host cell takes the virus in a one of its own. This method is called Membrane Fusion. Another form of entry is endocytosis. Viruses with no viral envelope enter the cell through endocytosis; they are ingested by the host cell through the cell membrane. The virus tricks the cell into thinking that the virus is nothing more than nutrition or harmless goods. One other way to gain entry is called genetic injection. This occurs when the virus attaches itself to the surface of the cell using receptors on the cell, and injecting only its genome into the cell, leaving the rest of the virus on the surface.

3. Explain why the Ebola virus would not infect a tobacco plant.

Ebola would not infect the tobacco plant because it knows how dangerous the effects of cigarettes are and it also supports #thetruth campaign.


All jokes aside Ebola would not infect a tobacco plant because viruses are very selective and they only infect certain organisms, once they choose they don't change. Since Ebola infects humans it will never infect plants unless it is mutated to spread to plants.

4. Name 5 viruses and the type of cell that they attack.

1. Influenza Virus (Flu) attacks the epithelial cell through the nose.

2. HIV Virus (AIDS) attacks the CD4 cell through physical touch.

3. Bacteriophage Virus attack the NDM-1 cell.

4. Porcine Circoviruses attacks the PVC1 cell.

5. Herpesviruses attacks the PRV4 cell.

5. You have been diagnosed with the flu. Explain why your doctor wont give you a prescription for antibiotics in order to cure infection.

Your doctor will not provide you with any form of antibiotics because viruses are not alive and therefore can not be affected by any antibiotics. If the doctor does gives you antibiotics they are trying to build up your bacteria's strength level.

6. How is it that a person can be infected with a virus such as HIV and not exhibit symptoms?

A person can have the HIV virus and not exhibit symptoms if the virus is in the lysogenic because it could be in a dormant stage and when it is in that dormant stage no symptoms or evidence of the virus is visible.