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,17. Pasteur first suggested that bacteria could cause disease in humAns by showing that
bacteria could:
A. contaminate canned foods.
B. cause plant diseases.
C. sour wine.
D. infect animals.
Ans: C
18. Pasteur’s observations that protozoa were related to the silkworm disease
strengthened his belief in the:
A. germ theory of disease.
B. doctrine of spontaneous generation.
C. eukaryotic nature of protozoa.
D. None of the above is correct.
Ans: A
19. Lister used to clean wounds and surgical instruments.
A. antibiotics
B. antitoxins
C. chlorine water
D. carbolic acid
,Ans: D
20. Koch’s postulates provided guidelines for:
A. relating certain microorganisms with certain diseases.
B. sterilizing laboratory supplies.
C. preparing pure cultures.
D. testing the sensitivity of microbes to antibiotics.
Ans: A
21. Koch was responsible for thorough observations on the organisms of:
A. measles and diphtheria.
B. diphtheria and plague.
C. plague and tetanus.
D. tuberculosis and anthrax.
Ans: D
22. Pasteur was able to prepare a vaccine against rabies even though:
A. rabies was not a deadly disease.
B. he was unable to see the organism.
C. he had no experience with microorganisms.
D. None of the above is correct.
, Ans: B
23. Which coworker of Koch's demonstrated that diphtheria could be treated with an
antitoxin?
A. Roux.
B. Yersin.
C. von Behring.
D. Pasteur.
Ans: C
24. The accomplishments of Koch include all the following except:
A. development of the rabies vaccine.
B. isolation of the tuberculosis bacterium.
C. development of culture techniques.
D. proof of the germ theory of disease.
Ans: A
25. Which scientists showed diphtheria was caused by a bacterial toxin?
A. Roux and Yersin
B. Pasteur and Koch
C. Luria and Delbrück