g) This phase is part of interphase.h) Mitotic cydin is at its lowest level.i) A Cdk protein is present in the cell.j) A cell cycle checkpoint has been identified in this phase.

• 同一个体不同组织的细胞中,核仁的大小和数目都有很大的变化,这种变化和细胞中蛋白质合成的旺盛程度有关。