8. Respiration

Where does the first stage of aerobic cellular respiration take place within a cell?

Starting with one molecule of glucose, glycolysis results in the net production of which of the following sets of energy-containing products?

Which of the following is a result of glycolysis?

In glycolysis, ________ is oxidized and ________ is reduced.

a. NAD⁺ ... glucose

b. Glucose ... oxygen

c. ATP ... ADP

d. Glucose ... NAD⁺

Step 3 in Figure 9.8 is a major point of regulation of glycolysis. The enzyme phosphofructokinase is allosterically regulated by ATP and related molecules (see Concept 8.5). Considering the overall result of glycolysis, would you expect ATP to inhibit or stimulate activity of this enzyme? Explain.

(Hint: Make sure you consider the role of ATP as an allosteric regulator, not as a substrate of the enzyme.)