1. Virus & Microorganism Quiz

2. 1 Viruses attack A. bacterial cells. B. animal cells. C. plant cells. D. all types of cells.

3. 2 Viruses are considered to be nonliving because they A. cannot multiply. B. are not cells. C. produce wastes. D. are always active.

4. 3 In order to multiply, a virus must A. conjugate with another virus. B. manufacture extra food. C. invade a host cell. D. remain hidden.

5. 4 Which of the following is NOT a characteristic of fungi? A. heterotroph B. reproduce with spores C. makes its own food D. eukaryotes

6. 5 Which of the following is a characteristic of all protists? A. unicellular B. eukaryotes C. heterotroph D. multicellular

7. 6 What provides energy for a virus? A. Food B. Its host C. The sun D. A parasite

8. 7 How does a vaccine work? A. It activates the body’s natural defenses. B. It weakens the cell walls of bacteria causing the cell to burst. C. It attacks antibiotic-resistant bacteria. D. It treats the symptoms of an infection.

9. 8 Which of the following statements about bacteria is false? A. All bacteria cause disease. B. Bacteria help in food production. C. Bacteria are used to make medications. D. Bacteria can be helpful in environmental cleanup.

10. 9 Most bacteria are surrounded by a rigid protective structure called the A. cell wall. B. cell membrane. C. protein coat. D. flagellum.

11. 10 10. Why are viruses like parasites? A. They multiply. B. They have their own DNA. C. They use energy to develop. D. They destroy the cells they enter.