Step-by-Step Solution:1. Understanding the Cell Cycle: The cell cycle is a series of events that a cell goes through as it grows and divides. It consists of four main phases: G1 (Gap 1), S (Synthesis), G2 (Gap
Biochemical studies on the replication of the genome of the small DNA virus simian virus 40 (SV40) have resulted in the identification of a number of DNA replication proteins from human cells. One of these, Replication Protein A (RPA), was phosphorylated in a cell cycle-dependent manner, ...
真核细胞中,DNA缠绕在组蛋白(histone)上(下图左图的蓝色结构),形成核小体(nucleosome),核小体进一步形成染色质(chromatin),染色质呈细丝状。 S phase发生DNA复制( DNA replication),复制后的DNA并没有立刻分开,而是通过着丝粒(centromere)连在一起,两条DNA被称为姐妹染色单体(sister chromatid)。此时的chromatin数目...
- **G1期(选项B)**:细胞进行生长并为DNA复制做准备,未发生DNA复制。- **S期(选项A)**:是DNA合成的阶段,此时期完成DNA的复制。- **G2期(选项C)**:细胞为分裂进行最后准备,如检查DNA完整性,不涉及DNA复制。- **M期(选项D)**:细胞进行有丝分裂或减数分裂,此时DNA已分配到子细胞。题目完整且选项明确...
This collection showcases ground-breaking cell cycle papers and reviews, ranging from basic discoveries to clinical applications.
而在受精之后,合子染色质重构的首要任务便是对精子携带入卵细胞的父源基因组进行快速、高效的解压缩,即用母源组蛋白替换包裹精子DNA的鱼精蛋白(“鱼精蛋白- 组蛋白置换”)。 过去已有的研究表明,一类在卵细胞中高度表达的酸性蛋白因子nucleoplasmin(NPM2)在这一过程中参与将鱼精蛋白由父源染色质中移除【1-6】;...
During cell cycle, DNA replicates View Solution Cell growth is a continous process while DNA replication occurs only during one specific stage in the cell cycle. View Solution a) Explain the process of DNA replication with the help of a schematic diagram. ...
period of the cell cycle between cell divisions. The longest part of the cell cycle. What happens during G1 phase? cell grows and synthesizes new proteins and organelles What happens during S phase? DNA replication What happens during G2? cell growth and preparation for division What happens ...
相关知识点: 试题来源: 解析 A。细胞周期中,间期负责 DNA 复制。间期包括 G1 期、S 期和 G2 期,其中 S 期进行 DNA 复制。前期(B 选项)主要是染色体出现等变化。中期(C 选项)染色体排列在赤道板上。后期(D 选项)姐妹染色单体分离。反馈 收藏
3a), suggesting that our results do not reflect cell cycle inhibition in general, but rather reflect 2CLC emergence together with DNA replication. In agreement, irreversible cell cycle arrest prevented 2CLC emergence (Extended Data Fig. 3b,c). Of note, we observed an increase in 2CLCs after ...