Concept 20 A half DNA ladder is a template for copying the whole.
Frank Stahl is Emeritus Professor of Biology at the University of Oregon. He maintains a research interest in characterizing and comparing the genetic recombination systems of yeast and coliphage. Matt Meselson is a Professor in the Department of Molecular and Cellular Biology at Harvard University. His laboratory studies sexual reproduction and genetic recombination, and how and why they are maintained in evolution. Arthur Kornberg was Professor Emeritus in the Department of Biochemistry at Stanford University. Dr. Kornberg investigated DNA replication.
- Go to:
- Frank Stahl
- Arthur Kornberg
Matthew Meselson
- Explaining density gradient centrifugation.
- The three models of DNA replication - semi-conservative, conservative, and dispersive - and whether bias played a role in designing/interpreting the experiment.
- How Meselson came to read the Watson and Crick paper, then think about ways to experimentally test how DNA replicates.
DNA and proteins are key molecules of the cell nucleus.
One gene makes one protein.
A gene is made of DNA.
Bacteria and viruses have DNA too.
The DNA molecule is shaped like a twisted ladder.
A half DNA ladder is a template for copying the whole.
RNA is an intermediary between DNA and protein.
DNA words are three letters long.
A gene is a discrete sequence of DNA nucleotides.
The RNA message is sometimes edited.
Some viruses store genetic information in RNA.
RNA was the first genetic molecule.
Mutations are changes in genetic information.
Some types of mutations are automatically repaired.