Bozeman Science
DNA Replication
Paul Andersen explains how DNA replication ensures that each cell formed during the cell cycle has an exact copy of the DNA. He describes the Meselson-Stahl experiment and how it showed that DNA copies itself through a semi-conservative...
Curated Video
Mismatch Repair of DNA
Mismatch repair (MMR) is a DNA repair mechanism that corrects base-pairing errors and small insertions or deletions that escape proofreading during DNA replication. A protein complex identifies the mismatch, excises a section of the...
Curated Video
Excision Repair of DNA: Nucleotide Excision Repair and Base Excision Repair
DNA repair mechanisms like base excision repair (BER) and nucleotide excision repair (NER) fix damage by removing and replacing affected regions. BER removes a single damaged base using glycosylases (e.g., to fix deaminated cytosine),...
Ancient Lights Media
Utilizing Restriction Enzymes
Restriction Enzyme Set: 3. This clip shows how restriction enzymes are used to produce recombinant DNA.
Ancient Lights Media
How Restriction Enzymes Work
Restriction Enzyme Set: 2. This clip explains the way in which enzymes clip DNA at specific points. The value of restriction enzymes in DNA is presented.
Catalyst University
DNA Replication of the Lagging Strand: Explanation Followed by Animation
Here we have provided an explanation of lagging strand DNA replication followed by an great animation beginning at 4:04.