Many types of cells are able to use membrane-spanning transport proteins and a source of energy to drive the active transport of glucose across the cell membrane. Let's consider a specific protein that is able to transport (from outside the cell into the cytoplasm) one molecule of glucose for each molecule of ATP the protein hydrolyzes. The details of this process are not important for this problem except that you can treat it like equilibrium process. The overall reaction and the associated AG at 298 K for this process are given below. Glc(out) + ATP + H20 = Glc(in) + ADP +P at T = 298 K, AG = -31.3 kJ mol~1 Additional Information: • P. is "inorganic phosphate" (i.e. PO43- & related species). At equilibrium, [P] = 3 × 10-3 M. • The cell maintains a ratio of ATP to ADP of about 20 (i.e. [ATP]/[ADP] = 20). • The maximum ratio of [Glc(in)] to [Glc(out)] occurs when the system is at equilibrium.

Many types of cells are able to use membrane-spanning transport proteins and a source of energy to drive the active transport of glucose across the cell membrane. Let's consider a specific protein that is able to transport (from outside the cell into the cytoplasm) one molecule of glucose for each molecule of ATP the protein hydrolyzes. The details of this process are not important for this problem except that you can treat it like equilibrium process. The overall reaction and the associated AG at 298 K for this process are given below. Glc(out) + ATP + H20 = Glc(in) + ADP +P at T = 298 K, AG = -31.3 kJ mol~1 Additional Information: • P. is "inorganic phosphate" (i.e. PO43- & related species). At equilibrium, [P] = 3 × 10-3 M. • The cell maintains a ratio of ATP to ADP of about 20 (i.e. [ATP]/[ADP] = 20). • The maximum ratio of [Glc(in)] to [Glc(out)] occurs when the system is at equilibrium.

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter4: Cells

Section: Chapter Questions

Problem 1ITD

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