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Ch. 9 - Cellular Respiration and Fermentation
All textbooksCampbell 12th EditionCh. 9 - Cellular Respiration and FermentationProblem 9
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Chapter 9, Problem 9

MAKE CONNECTIONS The proton pump shown in Figures 7.17 and 7.18 is a type of ATP synthase (see Figure 9.14). Compare the processes shown in the two figures, and say whether they are involved in active or passive transport (see Concepts 7.3 and 7.4).

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Hi everyone here we have a question asking which of the fallen performs passive transport? A A T. P synthesis by a T. P synthesis, be sodium potassium pump, c. Protein pump or D. All the above and passive transport. It will happen spontaneously because we have substrates of a higher concentration going to a lower concentration. And this happens with a T. P synthesis by a teepee synthes, the sodium potassium pump. They're going from a lower concentration to a higher concentration so that is active transport and the same for the proton pump. So our answer here is a A T. P synthesis by a TP synthes. Thank you for watching. Bye.
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MAKE CONNECTIONS Step 3 in Figure 9.9 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.)

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VISUAL SKILLS This computer model shows the four parts of ATP synthase, each part consisting of a number of polypeptide subunits (the structure in gray is still an area of active research). Using Figure 9.14 as a guide, label the rotor, stator, internal rod, and catalytic knob of this molecular motor.

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