Download Chapter 20 Review

Name
Class
Date
Chapter 20 Review: Bacteria, Viruses & Disease
Use the clues and words to help you write the vocabulary terms from the chapter in the
blanks. You may use a word once, more than once, or not at all.
retrovirus
spirillium
vaccine
antibiotic
1. An example of a spiral-shaped bacterium is
2. A
bacteriophage
.
is a virus that copies its genetic material from RNA to DNA.
3. A drug that blocks the growth of a bacterial disease is an
.
Answer the following questions.
4. Unicellular organisms that have no nucleus are called
.
5. Complete the compare/contrast table showing the differences between viruses and
bacteria.
Characteristic
Virus
Bacteria
Structure
Reproduction
Genetic code
Locomotion
Nourishment
6. What do we call microorganisms that cause disease? __________________________
7. Write the names of the three
shapes of bacteria in the top row in
the table to the right. Then, draw
each shape below its name.
8. Why do some scientists think that viruses are not alive? Name at least two reasons.
a. _______________________________________________________________
b. _______________________________________________________________
9. What are the two main parts that every virus has?
10. Label each line on the virus to the right.
11. Name the two kingdoms that bacteria are found in.
a. _____________________________________
b. _____________________________________
12. What type of cells do bacteria have?
13. Label the lined parts of the bacteria to the right.
14. What is it called when two bacteria exchange pieces of their DNA?
15. What do bacteria do when there isn’t enough food and water around them?
16. Describe three methods of controlling the spread of bacteria and viruses.
a. _______________________________________________________________
b. _______________________________________________________________
c. _______________________________________________________________
17. What is antibiotic resistance? How can it be stopped?
18. Describe the best method for washing your hands.