Gel Electrophoresis

Front

What is a point mutation?

Back

A point mutation is a genetic mutation where one nucleotide base is changed, resulting in the alteration of a single amino acid in a protein.

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What is gel electrophoresis?

Back

Gel electrophoresis is a laboratory technique used to separate DNA, RNA, or proteins based on their size and charge.

Front

What are the base-pairing rules in DNA?

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The base-pairing rules in DNA are A-T (adenine pairs with thymine) and G-C (guanine pairs with cytosine).

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Why are enzymes added to DNA before electrophoresis?

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Enzymes are added to DNA to cut the DNA into fragments, which allows for separation during the electrophoresis process.

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What is the purpose of gel electrophoresis in genetic analysis?

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The purpose of gel electrophoresis in genetic analysis is to separate and visualize DNA fragments for purposes such as DNA fingerprinting, cloning, and sequencing.

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What is the role of the gel in gel electrophoresis?

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The gel acts as a medium through which DNA fragments can migrate; smaller fragments move faster and farther than larger ones.

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What is the significance of the electric field in gel electrophoresis?

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The electric field causes the negatively charged DNA fragments to migrate towards the positive electrode, facilitating their separation.

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What is the difference between agarose gel and polyacrylamide gel?

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Agarose gel is typically used for separating larger DNA fragments, while polyacrylamide gel is used for smaller fragments and proteins.

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How can the results of gel electrophoresis be visualized?

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Results can be visualized using staining agents like ethidium bromide or SYBR Green, which bind to DNA and fluoresce under UV light.

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What is a DNA ladder in gel electrophoresis?

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A DNA ladder is a mixture of known DNA fragments of different sizes used as a reference to determine the size of unknown DNA samples.