Suppose the pH in the cell walls of an apical meristem became highly basic ( pH 7), but traffic through PIN proteins in the membrane remained normal. Where would you expect most auxin molecules to be concentrated-in the cell wall or cytoplasm? Would the auxin molecules be in the charged or uncharged form?

Question

Suppose the pH in the cell walls of an apical meristem became highly basic ( > pH 7), but traffic through PIN proteins in the membrane remained normal. Where would you expect most auxin molecules to be concentrated-in the cell wall or cytoplasm? Would the auxin molecules be in the charged or uncharged form?

Quizplus · Accepted Answer

A high pH in the cell walls would cause the dissociation of auxin molecules from the carboxyl group, resulting in an increase in the charged form of auxin. As a result, most auxin molecules would be concentrated in the cell wall.

Suppose the PH in the Cell Walls of an Apical