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Name ___________________________________________ Date__________ Period: _____________
VIRUSES AND BACTERIA
Compare and contrast viruses and bacteria. Place the following words/phrases where they
belong.
Curable
Vaccines
Not curable
Living
Transmitted person to person
Contains nucleic acids
VIRUS
Antibiotics
Deadly
Nonliving
Has a cell wall
Can be found in all living things
Has a capsid
BOTH
BACTERIA
Write whether the statement is true or false. If FALSE correct the underlined word to make
the statement true.
1. _________________
All viruses look alike
2. _________________
Bacteria are unicellular
3. _________________
Bacteria have cell walls
4. _________________
Bacteria have a nucleus
5. _________________
Every virus contains genetic material.
6. _________________
A virus can replicate on its own.
7. __________________ Bacteria contain DNA.
8. __________________ Viruses are considered living organisms.
9. __________________ Viral attachment to a host is a random process.
10._________________
A(n) envelope is present in all viruses.
Answer the following questions
11. List and explain the 5 steps of virus replication
A.
B.
C.
D.
E.
12. In what type of environmental conditions can bacteria be found? List two examples.
13. Bacteria are found in which of the 6 kingdoms? Viruses can be found in which kingdom?
14. Describe what a vaccine is. When do you give a person a vaccine?
15. Explain why the tobacco mosaic virus infects only a cell of a tobacco plant and not a human
cell?
16. What is a retrovirus? Give an example of a retrovirus.
17. State at least 3 situations where bacteria can be useful.
A.
B.
C.
18. Give 3 types of diseases caused by bacteria and 3 by viruses.
VIRUS
BACTERIA