Mode of DNA replication: Meselson-Stahl experiment
There were three basic models for DNA replication that had been proposed by the scientific community after the discovery of DNA's structure. These models are illustrated in the diagram …
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DNA structure and replication review (article) | Khan Academy
DNA replication occurs through the help of several enzymes. These enzymes "unzip" DNA molecules by breaking the hydrogen bonds that hold the two strands together.
Semi-conservative replication (video) | Khan Academy
Here, we focus on the Meselson-Stahl experiment, which proved DNA replication is semi-conservative. In this process, each new DNA pair consists of one old strand and one new …
DNA replication (article) | Khan Academy
During DNA replication, the two strands of the DNA double helix are unwound and separated by enzymes. Each strand then serves as a template, or guide, for synthesizing a new, …
Molecular mechanism of DNA replication - Khan Academy
Key points: DNA replication is semiconservative. Each strand in the double helix acts as a template for synthesis of a new, complementary strand. New DNA is made by enzymes called …
Leading and lagging strands in DNA replication - Khan Academy
DNA replication is a precise process where DNA unwinds and splits into two strands. Each strand then serves as a template for a new DNA molecule. The leading strand is built continuously, …
DNA structure and replication (practice) | Khan Academy
In a sample of double-stranded DNA, 30 % of the nitrogenous bases are adenine (A). What percentage of the nitrogenous bases in the sample are thymine (T)?
Phases of the cell cycle (article) | Khan Academy
To divide, a cell must complete several important tasks: it must grow, copy its genetic material (DNA), and physically split into two daughter cells. Cells perform these tasks in an organized, …
Replication (practice) | Khan Academy
In which of the following diagrams of DNA replication are the enzymes correctly labeled?