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Consider a uniport system where a carrier protein transports an uncharged substance A across a cell membrane. Suppose that at a certain ratio of [A]inside to [A]outside, the AG for the transport of substance A from outside the cell to the inside, Aoutside Ainside, is -11.3 kJ/mol at 25°C.

Consider a uniport system where a carrier protein transports an uncharged substance A across a cell membrane. Suppose that at a certain ratio of [A]inside to [A]outside, the AG for the transport of substance A from outside the cell to the inside, Aoutside Ainside, is -11.3 kJ/mol at 25°C.

Human Physiology: From Cells to Systems (MindTap Course List)
Human Physiology: From Cells to Systems (MindTap Course List)
9th Edition
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Lauralee Sherwood
Chapter3: The Plasma Membrane And Membrane Potential
Section: Chapter Questions
Problem 1SQE: Using the Nernst equation, calculate the equilibrium potential for Ca2 and for C1 from the following...
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Consider a uniport system where a carrier protein transports an uncharged substance A across a cell membrane. Suppose that at a certain ratio of [A]inside to [A]outside, the AG for the transport of substance A from outside the cell to the inside, Aoutside → Ainside, is -11.3 kJ/mol at 25°C. What is the ratio of the concentration of substance A inside the cell to the concentration outside? [A]inside [A]outside = Choose the true statement about the transport of A under the conditions described. Increasing [A]outside will cause AG for movement of Aoutside to Ainside to become a smaller negative number. Decreasing the concentration of the uniport protein in the membrane will cause AG to become a larger negative number. Movement of Aoutside to Ainside will be spontaneous. Because AG is negative, the ratio [A]inside/[A]outside must be greater than one.
Transcribed Image Text:Consider a uniport system where a carrier protein transports an uncharged substance A across a cell membrane. Suppose that at a certain ratio of [A]inside to [A]outside, the AG for the transport of substance A from outside the cell to the inside, Aoutside → Ainside, is -11.3 kJ/mol at 25°C. What is the ratio of the concentration of substance A inside the cell to the concentration outside? [A]inside [A]outside = Choose the true statement about the transport of A under the conditions described. Increasing [A]outside will cause AG for movement of Aoutside to Ainside to become a smaller negative number. Decreasing the concentration of the uniport protein in the membrane will cause AG to become a larger negative number. Movement of Aoutside to Ainside will be spontaneous. Because AG is negative, the ratio [A]inside/[A]outside must be greater than one.
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