Principles of Epidemiology and Microbiology
Lesson 2: Public Health Microbiology
Exercises: Lesson 2
EXERCISES, LESSON 2
INSTRUCTIONS. The following exercises are to be answered by marking the lettered response that best answers the question or by completing the incomplete statement or by writing the answer in the space provided.
After you have completed all the exercises, turn to "Solutions to Exercises" at the end of the lesson and check your answers.
1. Microscopic forms of life are known as ______________________________.
2. Microorganisms that cause disease in man or animal are known as
_____________________________________.
3. The basic unit, or building block, of all living matter is the _________________.
4. The simplest form of cell division is __________________________________.
5. The action of a living cell and its hereditary characteristics are governed by the
__________________________________________.
6. The metabolic processes of a living cell take primarily in the _________________.
7. Bacteria are:
a. Oblong parasites.
b. Unicellular organisms of the Kingdom Animalia.
c. Unicellular organisms of the Kingdom Monera.
d. The smallest known form of life.
8. Bacteria reproduce by:
a. Mitosis.
b. Meiosis.
c. Binary fission.
d. Sexual intercourse.
9. Bacteria that appear as chains of spherical objects are:
a. Bacilli
b. Streptococci
c. Gonococci.
d. Staphylococci.
10. Which of the following are means of locomotion?
a. Flagella.
b. Spores.
c. Capsules.
d. Inclusion bodies.
11. Which of the following is the least reliable means of identifying bacteria?
a. Appearance.
b. Food and oxygen requirements.
c. Staining characteristics and food requirements.
d. Productivity.
12. Microorganisms that grow on dead organic matter are known as ____________.
13. Which of the following diseases is caused by a gram-positive, aerobic, acid-fast
bacillus?
a. Typhoid fever.
b. Tetanus.
c. Tuberculosis.
d. Diphtheria.
14. Which of the following diseases is caused by a spirochete?
a. Syphilis.
b. Gonorrhea.
c. Leprosy.
d. Cholera.
15. Viruses are:
a. Saprophytes.
b. Facultative aerobes.
c. Obligate intracellular parasites.
d. Obligate anaerobes.
16. Viruses have no means of metabolism on their own; therefore, they are considered
to be true________________________________.
17. Viruses multiply by:
a. Binary fission.
b. Replication in the host cell
c. Mitosis
d. Sexual reproduction
18. Viruses that attach bacterial cells are known as _____________________.
19. Which of the following diseases are caused by viruses? (Mark more than one.)
a. Rabies
b. Typhoid fever.
c. Hepatitis
d. Malaria.
e. Yellow fever.
f. Polimyelitis.
g. Shigellosis.
20. Which of the following characteristics apply to rickettsiae?
a. Smaller than viruses.
b. Obligate parasites.
c. Multiply by binary fission.
d. Smaller than typical bacteria.
e. Normally transmitted through arthropods.
f. Normally pathogenic to arthropod hosts.
g. Uniform in shape within species.
21. Fungi are members of the _______________________ Kingdom.
22. The intricate vegetative network of a fungus or yeast is known as a
_____________________________.
23. Which of the following diseases are caused by fungi?
a. Leprosy.
b. Aspergillosis.
c. Ringworm.
d. Actinomycosis,
e. Gonorrhea.
24. Protozoa are members of the ________________ kingdom.
25. Which of the following characteristics apply to protozoa?
a. Usually possess means of locomotion.
b. Normally visible to the naked eye
c. Multicellular.
d. Form cysts for protection.
e. Generally larger than bacteria.
26. Amebae of man is found primarily in the ____________________.
27. The only ciliate pathogenic to man is ___________________, a natural inhabitant of
the of the _______________________ of the ________________.
28. Flagellates of man are usually found in the:
a. _________________ tract.
b. _________________ tract.
c. _________________ system.
29. The three classes of helminths of public health importance are:
a. ________________________.
b. _________________________.
c. _________________________.
30. Cestodes normally have two stages: __________________ and ___________.
