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Which of the following statements best describes catabolic pathways?  

A defect in which of the following molecules would dramatically reduce the rate of diffusion of water across cell membranes?  

Which of the following types of reactions would decrease the entropy within a cell?  

Which chemical group is most likely to be responsible for an organic molecule behaving as a base?  

Which of the following characteristics is most likely to be associated with an enzyme that catalyzes two different chemical reactions?  

Which of the following pairs of organism groups consist solely of prokaryotic cells?  

Which of the following statements best explains why the sodium-potassium pump is an electrogenic pump?  

Tay-Sachs disease is a human genetic disorder that results in the cellular accumulation of very large, complex, undigested lipids. Which of the following organelles is most likely defective in Tay-Sachs disease?  

Which of the following statements is true for water in its liquid state?  

In addition to activating or inhibiting enzymes through allosteric regulation, which of these mechanisms do cells also use to control enzymatic activity?