Viruses to Cells

Bittna Cho, Magnolia Luu

Questions

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


A virus is made up of a core DNA or RNA and a protein coat. It consists of nucleic acid surrounded by a coat of capsid for protection. You can find nucleic acid and protein in a virus.


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


The virus must bring its DNA or RNA into contact with the host cell. The infection needs to go through the cell membrane. Some attaches itself to the cell membrane and injects it's DNA or RNA into the cell.


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


Tobacco is has the ability to naturally create antibodies to a virus once they have become infected, even Ebola. If the Ebola virus infects the tobacco, the tobacco would create antibodies that would fight against the Ebola bacteria. So for Ebola to infect the tobacco plant would be useless and no nothing for the plant or the virus.


4. Name five viruses and the types of cell that they attack.



  1. Marburg attacks primate's cells
  2. HIV attacks human cells
  3. Small pox infects human cells
  4. Rabies attack human cells and animal cells



5. You have been diagnosed with the flu. Explain why a doctor will not provide you a prescription for antibiotics in order to cure your infection.


A doctor may not prescribe antibiotics for the flue because the antibiotics cannot completely cure the flu and it does not fight all of the virus. Taking antibiotics may even cause harm to the body if not takin with care. IT could cause antibiotics resistance where the bacteria can resist the antibiotics.


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


A person with a virus like HIV may not show symptoms right away because the cell the has been infected by the virus may not have duplicated itself and spread yet. Once the virus has attached a cell it will not spread and start showing symptoms till it has duplicated and spread throughout your body.

Picture Diagrams

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The Lytic and The Lysogenic Cycle

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Characteristics of Life

Don't Have:

They do not have organization because viruses does not have an organized cell structure.

They don't have a metabolism because viruses has nothing to metabolize.

They don't maintain homeostasis because they don't need to maintain their own homeostasis since they are not alive.

They don't show growth and development because viruses does not change size or their chemical position.

They also can't reproduce because they are not alive, or at least they can't by themselves without a host cell.

They don't respond to stimuli because they are not capable of responding to something only things that are alive can.


Do Have:

Viruses do have genetic material to produce more viruses in the form of DNA or RNA.

They do go through evolution and adaptations because they need to evolve to adapt to their new hosts.