Neco 2024 Biology Question 50
Practice objective / multiple choice question 50 from the 2024 Neco Biology examination.
In a cell, extracellular glucose concentration is 5 mM and intracellular concentration is 0.5 mM. A sodium‑glucose symporter transports one glucose molecule together with two Na^{+} ions from outside to inside. Extracellular Na^{+}=150 mM, intracellular Na^{+}=15 mM. Membrane potential (inside relative to outside) is -70 mV. At 37\,\degree C (310 K), calculate the overall free‑energy change (\(\Delta G\)) for moving one mole of glucose into the cell via this symporter. Use R = 8.314 J·mol^{-1}·K^{-1}, F = 96485 C·mol^{-1}. State whether the process is energetically favorable and give \(\Delta G\) in kJ·mol^{-1} (rounded to two decimal places).
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This is Neco 2024 Biology Question 50. It is one of the objective questions from the 2024 Neco Biology examination.
Difficulty level: Medium .
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