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DNA passes through a gel at different speeds depending on its size. The purpose of the ladder marker of a DNA is to make the passing of DNA possible.

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Solon Zboncak

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9y ago

DNA passes through a gel at different speeds depending on its size. The purpose of the ladder marker of a DNA is to make the passing of DNA possible.

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11y ago

To mark where the DNA is on the ladder-like structure of a DNA molecule.

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Q: What is the purpose of the ladder marker DNA?
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Why a ladder DNA marker is usually run in parallel with DNA samples separated by gel electrophoresis?

The ladder DNA marker is the reference to indicate the position of a particular resolved band according to the molecular weight. Once the gel is solved, the Rf of the bands can be estimated in reference to the ladder DNA marker.


One lane of an electrophoresis gel shows a 100bp ladder. What is the purpose of this ladder?

It is used as a marker for molecular weight.


What hold the side of DNA ladder together?

what holds the sides of the DNA ladder together


The secret of DNA has to do with the sequence of what along the DNA ladder?

The sequence of the nitrogenous bases, which are the 'rungs' of the DNA 'ladder' are what give DNA its specificity.


What forms the side of a DNA ladder?

Phosphates and Sugars formthe sides of the DNA ladder~


What are the sides of the DNA ladder are made up of?

The DNA ladder is made of sugar and phosphates.


What is an allele ladder and what is its function in DNA profiling?

it is a ladder.


What information can you determine from gel electrophoresis?

You can estimate the concentration of DNA or RNA in your extract as well as the size of the fragment(s) isolated by comparing to a known molecular marker/DNA ladder. 2 strand are smaller than 3 strand


What was Watson and cricks name for twisted-ladder of DNA?

Watson and Crick's Name for the twisted ladder of DNA


What makes up the sides of the DNA ladder?

Phosphate and sugar make up the sides of a DNA ladder.


What are the sides of the DNA ladder composed of?

The sides of the DNA ladder is composed of sugar and phosphate. 4 bases that make up the rungs of the DNA ladder are A, T, G, and C. The shape of the DNA is a double helix or twisted ladder.


How are the rungs of the DNA ladder broken as the DNA molecule unzips?

The rugs of DNA are Adenine, Guanine, Cytosine, and Thymine. When DNA replication occurs and the ladder has to be broken, an enzyme called "helicase" starts at the replication fork and unwinds the DNA ladder. Helicase breaks the rugs of DNA.