試題詳解

27. Based on the acid growth model of cell expansion in the plant, which statement is correct?
(A) Proton pumps on the plasma membrane are activated by de novo synthesis of gibberellins.
(B) Protons are pumped from cell wall space into the cytoplasm to acidify the cell.
(C) Expansins function to re-connect the linkage between cellulose microfibrils after cell expansion.
(D) The direction of elongation is perpendicular to the alignment of microfibrils.
(E) The losing reaction of microfibrils can also be observed in the secondary cell wall.