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?

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#Question id: 2341

#Unit 2. Cellular Organization

Water molecules crossing a plasma membrane do so by

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#Question id: 19159

#Unit 13. Methods in Biology

In anion exchange chromatography,

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#Question id: 1528

#Unit 4. Cell Communication and Cell Signaling

Mutation of p53 is described as a dominant-negative mutation. Which of the following statement is correct regarding to the mechanism by which this mutation causes the dominant-negative phenotype?

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#Question id: 7109

#Unit 5. Developmental Biology

What observation might explain how somites originally become specified to form structures appropriate to their position along the antero-posterior axis?

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#Question id: 12431

#Unit 10. Ecological Principles

Nitrifying bacteria participate in the nitrogen cycle mainly by