Khan Academy
If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
Khan Academy
Learn about DNA sequencing in this Khan Academy video.
Khan Academy
The page is experiencing technical difficulties. Please try again later.
Intro to biotechnology - Khan Academy
DNA sequencing involves determining the sequence of nucleotide bases (As, Ts, Cs, and Gs) in a DNA molecule. In some cases, just one piece of DNA is sequenced at a time, while in other cases, a large collection of DNA fragments (such as those from an entire genome) may be sequenced as a group.
Stages of transcription - Khan Academy
Transcription is the process in which a gene's DNA sequence is copied (transcribed) to make an RNA molecule. RNA polymerase is the main transcription enzyme. Transcription begins when RNA polymerase binds to a promoter sequence near the beginning of a gene (directly or through helper proteins).
DNA sequencing - Khan Academy
DNA sequencing is the process of determining the sequence of nucleotide bases (As, Ts, Cs, and Gs) in a piece of DNA. Today, with the right equipment and materials, sequencing a short piece of DNA is relatively straightforward.
Polymerase chain reaction (PCR) (video) | Khan Academy
PCR (Polymerase Chain Reaction) is a vital technique in molecular biology, enabling researchers to amplify specific DNA fragments exponentially. Essential for cloning, forensics, and medical diagnostics, PCR involves three main steps: denaturation, annealing, and extension.
Khan Academy
Review the structure and replication of DNA, including key concepts and mechanisms.
Khan Academy
Learn about gel electrophoresis, a technique used to separate DNA fragments based on size.
Khan Academy
Learn about DNA cloning and recombinant DNA techniques on Khan Academy.