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相关概念视频

Replication in Eukaryotes02:31

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Replication in Prokaryotes01:32

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DNA replication has three main steps: initiation, elongation, and termination. Replication in prokaryotes begins when initiator proteins bind to the single origin of replication (ori) on the cell's circular chromosome. Replication then proceeds around the entire circle of the chromosome in each direction from the two replication forks, resulting in two DNA molecules.
Many Proteins Work Together to Replicate the Chromosome
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The Replisome03:01

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DNA replication is carried out by a large complex of proteins that act in a coordinated matter to achieve high-fidelity DNA replication. Together this complex is known as the DNA replication machinery or the replisome.
The synthesis of the leading and lagging strands is a highly coordinated process. To explain this, the “Trombone model” was proposed by Bruce Alberts in 1980. The DNA loop formation starts when a primer is synthesized on the parent lagging strand. The loop grows with...
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DNA replication involves the separation of the two strands of the double helix, with each strand serving as a template from which the new complementary strand is copied.  After replication, each double-stranded DNA includes one parental or “old” strand and one “new” strand. This is known as semiconservative replication. The resulting DNA molecules have the same sequence and are divided equally into the two daughter cells.
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The DNA Replication Fork01:02

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An organism’s genome needs to be duplicated in an efficient and error-free manner for its growth and survival. The replication fork is a Y-shaped active region where two strands of DNA are separated and replicated continuously. The coupling of DNA unzipping and complementary strand synthesis is a characteristic feature of a replication fork.   Organisms with small circular DNA, such as E. coli, often have a single origin of replication; therefore, they have only two replication...
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Before a cell can divide, it must accurately replicate all of its chromosomes, including the DNA and its associated histone and non-histone proteins.  This process begins at numerous origins of replication during the S phase of the cell cycle in each of a cell’s chromosomes simultaneously. Certain nucleotides can act as origins of replication, but these sequences are not well defined - especially in complex, multi-cellular, eukaryotic species. The length of DNA that spans an origin...
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复制水平的复制水平

Iver H Iversen1

  • 1University of North Florida, Jacksonville, FL USA.

Perspectives on behavior science
|March 13, 2025
PubMed
概括
此摘要是机器生成的。

行为分析中的复制超出了重复实验的范围. 它是会话过程中不可或缺的组成部分,展示了时刻对刺激的控制.

关键词:
钱包包的钱包,一个小钱包.离散审判程序 离散审判程序时刻对时刻进行分析.一个案例的设计.控制刺激 控制刺激在会话内复制.

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科学领域:

  • 行为分析 行为分析
  • 实验心理学 实验心理学

背景情况:

  • 复制对于建立行为分析中发现的普遍性至关重要.
  • 传统上,复制包括直接或系统地重复整个实验.

研究的目的:

  • 要强调复制也是行为分析中的许多实验内程序的固有组成部分.
  • 为了证明一刻一刻的分析是如何成功复制的关键.

主要方法:

  • 对单一刺激和有条件歧视程序的分析.
  • 在会议内实验设计的插图,其中包括复制.
  • 对行为反应进行细粒度数据分析.

主要成果:

  • 复制嵌入在程序中,例如通过重复的迷你AB设计进行单刺激歧视.
  • 条件歧视程序本质上也涉及通过试验结构的复制.
  • 时刻对时刻的行为分析证实了会话中的复制存在.

结论:

  • 行为分析中的复制是多方面的,在实验中和实验中都会发生.
  • 了解会话内复制可以增强对刺激控制和实验严谨性的分析.