試題詳解

21. About the phytochrome, which one of the following is the best answer?
(A)Pr and Pfr are the same protein.
(B) Pr can trigger the flower gene of long-day plant.
(C) Pfr can trigger the flower gene of short-day plant.
(D)During the night time, the flash of light can increase the level of Pr
(E)The night-length can be broken by the flash of light, likewise, the day-length can be broken by covering the black tank.