Helicobacter pylori is, in part, able to survive in the stomach by its ability to produce
A. lactic acid from sugar.
B. fatty acids from sebum.
C. neutralizing proteins from glucans.
D. ammonia from urea.
D.
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Which of the following is not true of sponges?
A. Mesohyl is mostly noncellular and provides structural support. B. Choanocytes have flagella that beat in a coordinated fashion. C. Sponges are among the most primitive organisms to have developed reproductive organs. D. Gas exchange of oxygen and carbon dioxide occurs through diffusion.
Gene inactivation is likely to produce
A. pseudogenes. B. orthologs. C. paralogs. D. homologues. E. horizontal gene transfer (HGT).
You wish to obtain a pure mitochondria sample from lysed cells. The best way to obtain this sample would be
A) centrifugation. B) chromatography. C) polyacrylamide gel electrophoresis. D) agarose gel electrophoresis. E) both choices A and C
Which condition would most likely lead to an apparently normal human female?
a. Turner syndrome b. Down syndrome c. cri-du-chat d. Triple-X syndrome e. Klinefelter syndrome