試題詳解

5. Cell membrane molecules are labeled with a fluorescent tag and then a portion of then are bleached with a laser beam. What would one observe after the cell is incubated for a few minutes?
(A) The bleached molecules would disappear into the cell.
(B) The bleached molecules would diffuse laterally through the membrane and intermix with unbleached molecules.
(C) The bleached molecules would remain in the spot where bleaching occurred.
(D) All the bleached molecules would flip-flop across the cell membrane.
(E) A11 of the choices are correct.