Base Your Answers to the Questions Below on the Following

question 5

Multiple Choice

Base your answers to the questions below on the following information:
A cell biologist interested in the transport of calcium ions (Ca2+) across the plasma membrane of bacterial cells made the following measurements on bacterial cells at 25°C:
Vm = - 150 mV [Ca2+] inside = 20 mM [Ca2+] outside = 0.4 mM
-What is the free energy change for the inward movement of calcium ions into the bacterial cell?

• A)+4.6 kcal/mol; an exergonic reaction
• B)- 4.6 kcal/mol; an endergonic reaction
• C)- 4.6 kcal/mol; an exergonic reaction
• D)+4.6 kcal/mol; an endergonic reaction
• E)none of the above

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