AIDS is caused by a
A) bacterium. B) prion. C) virus. D) viroid. E) fungus.
C
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Spherical resting cells produced by Sporocytophaga are called ________.
A. microcysts B. heterocysts C. oocysts D. nitrocysts
A farmer has a localized, painful skin infection. Cultures are set up, and <-hemolytic, cata-lase-negative, and gram-positive bacilli are isolated. Based on this information, which of the fol-lowing biochemical results are expected—urease, H2S production in TSI, and nitrate reduction?
a. Positive urease, positive TSI, and positive nitrate b. Positive urease, negative TSI, and nega-tive nitrate c. Negative urease, positive TSI, and nega-tive nitrate d. Negative urease, negative TSI, and nega-tive nitrate
Which molecules diffuse into the lymph
vessels during absorption in the small intestine?
a. simple sugars b. triglycerides c. amino acids d. nucleotides e. all of these
Clostridium tetani, the bacterium that causes tetanus, can survive in soil for up to 40 years. It is most likely in which of the following structures?
A. a cell membrane B. a nucleus C. a cell wall D. a pilus E. an endospore