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Unit 6 Life’s Structure and
Classification
1/31/12
EQ: How is a virus different than an animal cell?
Objective: SWBAT understand what a virus is and realize the
differences between a virus and an animal cell.
Vocab:Virus, latent virus, active virus
Initial activity: Anticipation Guide Write true or false
 Antibiotics can treat viruses
 A virus is alive
 Almost every living thing can be infected by a virus
 Your body can naturally infect itself from viruses
 Viruses developed from animals
Where we are…..
Where we are going…
Now:Viruses, Bacteria, Plants
Next: Invertebrates, Chordates
In the future: Animal Behavior Experiment,Ecology
Talk with your neighbor and answer the
following questions:
1) Is a virus alive?
2) Why can viruses be serious?
3) Do you know any famous viruses?

Virus: a strand of hereditary material
surrounded by a protein coating
◦ No nucleus, other organelles or a cell membrane
◦ All viruses have one common purpose, to
reproduce.
Virus makes copies of itself with the help of
a host cell
 Organism bearing the virus is known as a
vector


Active virus: when a virus enters a cell
and it is active, it causes the host cell to
make new viruses.

Latent viruses: inactive viruses. After the
virus enters the cell, its hereditary
material becomes part of the cells
hereditary material. It does not
immediately make a new virus or destroy
the cell. Certain conditions inside the cell
can activate it and make it alive.
Talk with your neighbor
about the differences between an active
virus and a latent virus
Activity
Complete the virus size activity
 Draw in your notebook the pathway of
infection on page …….

Unit 6 Life’s Structure and
Classification
2/1/12
EQ: How do viruses affect organisms?
Vocab: vector
IA: Spreading the virus!

Viruses cannot move by themselves: they
need a vector
◦ hands, bodily fluids, surface of plants, inhaled
Viruses must fit on the surface of the host
cell
 Center for Disease Control

West Nile Virus
Activity

Graphing the infection
◦ Scientists need to compare disease outbreak
in order to determine if the situation is
getting worse or better
Unit 6: Life’s Structure and Function
2/5/12
EQ: How can we prevent infection?
Vocab: interferons
Initial Activity:
Prokaryote/ Eukaryote/ Virus Comparison
Quiz
Question
Is made out of a cell or cells?
Has a nucleus?
Is considered living?
Can move on its own?
Can reproduce or replicate?
Has DNA?
Has specialized structures or
internal compartments?
May have a cell wall?
Has membrane bound organelles?
Has ribosomes?
Has cytoplasm?
Has mitochondria?
Eukaryote
Prokaryote Virus
Preventing Viruses and Using Viruses
for Medical Advances
Improving sanitary conditions
 Pest control and isolation programs
 Natural immunity: your body makes
interferons. Proteins that protect cells
from viruses.
 Vaccines: weakened virus that causes your
body to produce interferons to fight the
infection.

◦ Edward Jenner: produced the first vaccine in
1796
Activity

Virus Presentations: Students will each be
assigned a group to research a different
virus. They will then need to present their
findings to the class.
◦ Presentation must include




Description of the Virus
Symptoms the Virus Causes
History of the Virus
Means to Prevent the Virus