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1Suppose this experiment was repeated two weeks in a row. Each time the same person was the hand scrubber and the procedure was repeated exactly the same. Would you expect the number and kinds of microorganisms present in the first hand scrub (A) or the last hand scrub (E) to be similar from week to week?
A)I would expect the number and kinds of microorganisms present in the first hand scrub (A) to be similar from week to week.
B)I would expect the number and kinds of microorganisms present in the last hand scrub (E) to be similar from week to week.
C)Neither choice (scrub A or scrub E) would be similar from week to week.


2Veal infusion agar was used as the growth media in this experiment. How do you think your results would vary if nutrient agar was used in place of the veal infusion agar?
A)If nutrient agar was used, the number of organisms per mL would be less, because nutrient agar does not provide complex nutrients for fastidious organisms.
B)If nutrient agar was used, the number of organisms per mL would be more, because nutrient agar does not provide complex nutrients for fastidious organisms.


3By the end of hand scrub E, all the resident bacteria have been removed from the hands.
A)True
B)False


4Which of the following choices is more likely to contain pathogenic organisms?
A)The resident bacterial population is more likely to contain pathogenic organisms.
B)The transient bacterial population is more likely to contain pathogenic organisms.


5Candida albicans is a normal inhabitant of the human tongue. This is an example of which kind of flora?
A)Resident flora
B)Transient flora
C)This is not an example of either kind of flora because it is a yeast.





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