Need a b 9. A cell membrane at 37°C is found to be permeable to Ca²+ but not to anions, and analysisshows the inside concentration to be 0.200 M and the outside concentration to be 0.005 Min Ca?+.a) What potential difference in volts would have to exist across the membrane for Ca?+to be in equilibrium at the stated concentrations? Assume that activity coefficients are equalto 1. Give the sign of the potential inside with respect to that outside.b) If the measured inside potential is +100 mV with respect to the outside, what is theminimum (reversible) work required to transfer 1 mol of Ca²+ from outside to inside underthese conditions?

Biological membranes are primarily made up of phospholipids, sphingolipids, and cholesterol. They…

Answered: Need a b

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Biochemistry

Need a b

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Question

Need a b

9. A cell membrane at 37°C is found to be permeable to Ca²+ but not to anions, and analysis
shows the inside concentration to be 0.200 M and the outside concentration to be 0.005 M
in Ca?+.
a) What potential difference in volts would have to exist across the membrane for Ca?+
to be in equilibrium at the stated concentrations? Assume that activity coefficients are equal
to 1. Give the sign of the potential inside with respect to that outside.
b) If the measured inside potential is +100 mV with respect to the outside, what is the
minimum (reversible) work required to transfer 1 mol of Ca²+ from outside to inside under
these conditions?

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