BIOLOGY 204 ANTELOPE VALLEY COLLEGE
GENERAL MICROBIOLOGY FALL 2007
INSTRUCTOR: Dr A. Hemsley
THEORY TEST 3 100 POINTS
STUDENT NAME: ___________________________________
STUDENT I.D. NUMBER: _____________________________
• Perusal time = 10 minutes
• Test time = 105 minutes
• ANSWER ALL QUESTIONS
• Read ALL questions carefully during perusal time, you may write if you wish.
• Use the back of each sheet if you do not have enough writing space, but please label each answer.
• Question subheadings are NOT of equal points value.
• Points allocated for each subheading are shown at the end of the question.
GOOD LUCK!
QUESTION 1 (Total =10 points)
Match entries in the left column with answers from the lettered choices in the right column. Write your letter choice to the far left of each question in the spaces provided. Use each answer only ONCE. (1 Point per correct pair)
_____ 1. Protozoan phylum whose members have pseudopods a. Apicomplexans
_____ 2. Protozoan phylum whose members lack mitochondria b. Systemic
_____ 3. Protozoan phylum whose members lack microtubules c. Opportunistic
and mitochondria
_____ 4. Fungal Infection where microbes invade dead skin and hair d. Mycosis
_____ 5. Protozoan phylum whose members have an apical bag of e. Ciliophora
digestive enzymes
_____ 6. Fungal Infection where microbes invade the entire body f. Superficial
_____ 7. Protozoan phylum whose members include hemoflagellates g. Microspora
_____8. Fungal infection attacking immunocompromised individuals h. Amoebozoa
_____ 9. Protozoan phylum whose members possess cilia i. Archaezoa
_____ 10. Term to describe fungal infections j. Euglenozoa
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QUESTION 2 (Total =10 points)
A. Name the 3 major reservoirs for infection . (3)
B. Give one specific example for each reservoir. (3)
C. List the 4 steps of Koch’s postulates (2)
D. Give 2 situations where a disease etiology cannot satisfy Koch’s postulates, and a specific example of a disease organism (pathogen) that falls into each situation category. (2)
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QUESTION 3 (Total =20 points)
A. There are three main phyla of algae. Name each of these and describe their likely environment with respect to (i) the depth at which they will be found and (ii) the type of light they use for photosynthesis. (9)
B. Name two useful substances that we obtain from algae, and a purpose or application for each one. (2)
C. Give three examples of individuals most likely to be infected by opportunistic pathogens (3)
D. What health care measures do you know about that would assist in protecting these individuals? (Try to name at least three measures in your answer) (6)
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QUESTION 4 (Total =20 points)
A. Explain why viruses are difficult to treat with any type of antimicrobial drug. (4)
B. What Is meant by the term virion, and what structures would be found in one? (6)
C. Explain the difference between a primary cell culture and a continuous cell culture (4)
D. Explain the difference between a Retrovirus and other types of RNA virus in terms of the mechanism used for replication (6)
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QUESTION 5 (Total =20 points)
Fill in the blanks in the following sentences. (1 point per correct sentence)
1. A disease that spreads from one host to another is known as a ______________________ disease.
2. A specific group of symptoms and signs accompanying a disease is known as a ______________________.
3. The ____________________________of a disease describes the number of people developing a new case of the
disease in a given time period.
4. The ____________________________of a disease describes the number of people with the
disease in a given time period.
5. The presence of viruses in the blood is known as __________________________.
6. Bacteria multiplying in the blood is a condition known as ______________________________.
7. The presence of toxins in the blood is known as __________________________.
8. Archaea are prokaryotes with _____________(size) ribosomes.
9. ________________________ are prokaryotes with peptidoglycan in their cell walls.
10. ____________________________ are protists that have plant-like properties and animal-like properties.
11. When conditions are unfavorable, some protozoans will form a protective capsule and become a dormant form known as a ____________________________.
12. One method to identify bacteria is by ____________________________.
13. ____________________________ is the process of describing all metabolic and anatomical features of a bacterium and its evolutionary relationship with other bacteria.
14. A virus family that causes the common cold is the ____________________________.
15. Genes in our own genome that may mutate and cause cancer at a later time are called ______________________.
16. An infection found in only one region of the body is a ___________________________ infection.
17. An example of a cancer causing RNA virus is the ____________________________ .
18. One way to culture animal viruses is in ____________________________.
19. The lipid layer that a virus may pick up as it leaves a host cell is called the _______________________.
20. Genes whose alteration may lead to cancer usually govern _____________________________ within the cell.
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QUESTION 6 (Total =20 points)
A. What is the difference between an intermediate host and a definitive host for helminths? (5)
B. The human is an intermediate host for the tapeworm Echinococcus granulosus. Is this a survival advantage for this parasite? (5)
C. Describe the life cycle of your favorite worm. (5)
D. How do Nematodes differ from Platyhelminths? Give at least 2 differences (5)
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