1) On your antiseptic plate, after incubation you saw a large clearing surrounding the mercurochrome disk for S. aureus but no clearing at all for E. coli. What does this mean?
A) Both E. coli and S. aureus are resistant to mercurochrome.
B) S. aureus is sensitive to mercurochrome and E. coli is resistant.
C) Both E. coli and S. aureus are sensitive to mercurochrome.
D) S. aureus is resistant to mercurochrome and E. coli is sensitive
2) Which of the following bacteria produces an ENDOSPORE and will therefore be more resistant to most disinfectants?
A) Mycobacterium tuberculosis
B) Staphylococcus epidermidis
C) Bacillus subtilis
D) Escherichia coli
3) What of the following is TRUE concerning the difference between disinfectants and antiseptics?
A) Disinfectants are applied to host tissue and antiseptics are applied to inanimate objects
B) Antiseptics are antiviral and disinfectants are antifungal.
C) Antiseptics are applied to host tissue and disinfectants are applied to inanimate objects.
D) Disinfectants are given intravenously and antiseptics are given topically.
4) What does the enzyme caseinase do?
A) degrade starch
B) hydrolyze milk protein
C) synthesize fat
D) digest lipids