The absence of ________ leaves obligate anaerobes susceptible to killing by oxygen.
A. carotenoids
B. superoxide dismutase
C. peroxidase
D. vitamin E
E. catalase
Answer: B
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Consider a tadpole becoming a toad. You would expect to find it changing its form of nitrogenous waste from ________ to __________.
A. ammonia, urea B. urea, ammonia C. uric acid, urea D. urea, uric acid E. uric acid, ammonia
An example of a fomite would be:
A) a drinking glass used by a patient. B) bandages from an infected wound. C) soiled bed linens. D) all of the above
H2CO3 is
a. sulfuric acid. b. carbonic acid. c. carbolic acid. d. hydrochloric acid. e. nitric acid.
Koch's postulates include all the following except:a
when a sample of a pure culture is injected into a healthy host, it causes the same disease. b. a sample of the microorganism from a diseased host can be grown in pure culture. c. the microorganism can be recovered from an experimentally infected host. d. the microorganism must be visible in the electron microscope. e. the pathogen must be present in every individual with the disease.