Biology Pages
Kimball's Biology Pages: Restriction Enzymes
This site is a retired biology professor's explanation of restriction enzymes. Good visual showing examples of how enzymes cut DNA to produce blunt or sticky ends.
Biology Pages
Kimball's Biology Pages: Dna Replication
This page provides a fairly high level explanation of DNA replication with extensive graphics. Good description of this process.
Cold Spring Harbor Laboratory
Dolan Dna Learning Center: Dna Restriction
Animated slide show demonstrates the genetic engineering process of DNA restriction.
Khan Academy
Khan Academy: Restriction Enzymes & Dna Ligase
Learn about restriction digestion, where the result has sticky ends and blunt ends. Also find out about ligation reactions.
BiologyWise
Biology Wise: Dna Replication Enzymes
Discusses what happens during DNA replication and describes the prime replication enzymes found in eukaryotes.