Which of the following bacteria is known to be a contributing factor in the development of stomach ulcers?
A. Clostridium tetani
B. Vibrio cholerae
C. Helicobacter pylori
D. Staphylococcus aureus
E. Escherichia coli
C. Helicobacter pylori
Biology & Microbiology
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Recombination involves the breakage and reunion of DNA molecules from
A) homologous nonsister chromatids. B) homologous sister chromatids. C) heterologous nonsister chromatids. D) heterologous sister chromatids.
Biology & Microbiology
Which of the following pHs is the most acidic?
a. 1 b. 3 c. 5 d. 7 e. 9
Biology & Microbiology
Dolly, the cloned sheep, had telomeres that:a
Were unusually short. b. Were unusually long. c. Got longer with each cell division. d. Did not change in length. e. Perfectly normal
Biology & Microbiology
The earliest type of eukaryotic organism
currently known is a type of a. virus. b. bacterium. c. alga. d. anim
Biology & Microbiology