Some of the intestinal symptoms elicited by pathogens such as Salmonella, Shigella, and Escherichia are due to the presence of
A) pseudomurein.
B) S-layers.
C) lipopolysaccharides.
D) peptidoglycan.
Answer: C
Biology & Microbiology
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A. Action of a virus B. Missense mutation C. A translocation D. Gene amplification E. None of the answers are correct
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Females choosing males with elongated
eyestalks over those with short eyestalks is an example of
a. directional selection. b. disruptive selection. c. dominance. d. a sexual handicap. e. sexual selection
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In translation, a cytosine in tRNA pairs opposite
A. uracil. B. guanine. C. thymine. D. adenine.
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An organic molecule contains two or more atoms of
A. carbon. B. hydrogen. C. oxygen. D. All of these answers are true.
Biology & Microbiology