Microaerophiles are microbes that grow best at low
A) carbon dioxide levels.
B) pH values.
C) hydrostatic pressure.
D) oxygen levels.
E) salt concentrations.
D
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Over-the-counter medications for acid reflux or heartburn block the production of stomach acid. Which of the following cells are directly affected by this medication?
A) goblet cells B) chief cells C) parietal cells D) smooth muscle cells
If a DNA molecule was a spiral staircase, what
would the steps of the staircase be?
a. covalent bonds. b. deoxyribose. c. base pairs. d. hydrogen bonds. e. phosphate
In the Calvin-Benson or C3 photosynthetic pathway, the enzyme rubisco catalyzes the reaction called
A) chemosynthesis. B) carboxylation. C) photoreduction. D) respiration.
In the process of science, which of these is tested?
A) a result B) an observation C) a hypothesis D) a control group