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DNA sequencing (video) | Biotechnology | Khan Academy
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Overview: DNA cloning - Khan Academy
DNA cloning is the process of making multiple, identical copies of a particular piece of DNA. In a typical DNA cloning procedure, the gene or other DNA fragment of interest (perhaps a gene for a medically important human protein) is first inserted into a circular piece of DNA called a plasmid.
Lesson 5: DNA and DNA replication - Khan Academy
Leading and lagging strands in DNA replication. Speed and precision of DNA replication. Levels of DNA organization. Telomeres and single copy DNA vs repetitive DNA. DNA repair 1. DNA repair 2. Semi-conservative replication. Test prep > MCAT > …
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Learn about gel electrophoresis, a technique used to separate DNA fragments based on size.
The genetic code - Khan Academy
Genes that provide instructions for proteins are expressed in a two-step process. In transcription , the DNA sequence of a gene is "rewritten" in RNA. In eukaryotes, the RNA must go through additional processing steps to become a messenger RNA , or mRNA.
Gel electrophoresis (video) | Biotechnology | Khan Academy
Gel electrophoresis is a technique used to separate DNA, RNA, or protein fragments by size. It involves a gel, electric charge, and migration of molecules. DNA samples are placed in wells within an agarose gel, and an electric field is applied.
Lesson 4: Translation - Khan Academy
DNA serves as the molecular basis of heredity through replication, expression, and translation processes. Replication creates identical DNA strands, while transcription converts DNA into messenger RNA (mRNA). Translation then decodes mRNA into amino acids, forming proteins essential for life functions.
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This unit is part of the Biology library. Browse videos, articles, and exercises by topic.
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It involves cutting DNA into fragments, separating them by size through gel electrophoresis, transferring them onto a filter, and exposing them to a radio-labeled DNA probe. This process helps visualize the presence of a gene of interest.
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