EXERCISES, LESSON 1
INSTRUCTIONS: Answer the following exercises by marking the lettered response that
best answers the question or best completes 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. For each exercise answered incorrectly,
reread the material referenced with the solution.
A germ is:
a. A specific type of microorganism which is known to cause disease.
b. A virus that is pathogenic to humans.
A term used by many people to describe all microorganisms.
d. A small creature that is present in the gastrointestinal systems of arthropods.
A spore is:
a. A reproductive form of microorganism (like bacteria).
b. A resting stage form of life that is capable of enduring undesirable
A form of microorganism which is very susceptible to heat and chemical
d. A stage of growth most microorganisms pass through before they can
Select the statement that describes a virus.
a. Viruses are microorganisms that range in size from 5 to 10 microns in length.
b. Viruses are the second smallest microorganisms.
Viruses are the only microorganisms that are obligate intracellular parasites.
d. Viruses are microorganisms that have an outer coat of protein and an inner
core of either DNA or RNA.