A.He hurt his knee when a tall ladder fell on him. B.He injured his ankle when he fell from a ladder. C.He twisted his back when he was doing some painting. D.He sprained his hand when he fell off the roof of his house.
【单选题】Rhodopsin, the protein that detects light in the vertebrate eye, has a second activity: it is a ____________ that facilitates rapid randomization, exceeding 10,000 phospholipids per protein per second...