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HIGH SCHOOL

Biology

Concept Videos

Anatomy and Physiology

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Essential Cellular Processes

Interphase and Cell Growth

Description

Interphase is the part of the cell cycle when a cell grows and prepares to divide. It is a major stage of the cell cycle, and it comes before cell division begins.

During interphase, the cell carries out its normal functions. It also copies its DNA so each new cell can receive a full set of genet...

Transcript

在真核细胞中,细胞周期的大部分时间处于间期,间期分为三个阶段:G1期、S期和G2期。

 在G1期(第一个生长期),新生成的子细胞增大体积,并为下一阶段的DNA复制进行准备。

现在,在S期即合成期,细胞会复制其细胞核DNA,这些DNA仍以染色质形式存在。细胞还会复制中心体,即微管组织结构,它将形成有丝分裂纺锤体装置。

最后,在G2期(第二个生长期),细胞继续生长,增殖有丝分裂所需的细胞器和蛋白质,并补充其能量储备。此时,细胞已准备好进入有丝分裂的第一阶段。

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