Question

a respiring bacterial cell experienced a change such that the external ph and internal ph across its cell membrane had the same value of 6.5 and the net charge difference across the membrane was 0 millivolts. which statement below among a - d is false concerning the state of this cell? atp formation by this cell would be negatively affected in a big way. the proton motive force would be zero. there would be no electrochemical potential available for cellular work. the δψ value would be affected by this change, but not the δph value (equation: δp = δψ - 60δph) none of a - d is false; all are true.

Explanation:

The proton - motive force ($\Delta p$) is related to the membrane potential ($\Delta\psi$) and the pH gradient ($\Delta pH$) by the equation $\Delta p=\Delta\psi - 60\Delta pH$. When the net charge difference across the membrane is 0 and the external - internal pH difference is 0, the proton - motive force would be zero. ATP formation is closely related to the proton - motive force, so it would be negatively affected. A change in the membrane potential ($\Delta\psi$) would affect the $\Delta p$ value. Also, the electrochemical potential is related to the proton - motive force and is used for cellular work.

Answer:

None of A - D is false; all are true.