The structure of DNA, that Watson and Crick discovered, suggests how genetic information is passed on.
Duration: 48 seconds
The structure of DNA, that Watson and Crick discovered, suggests how genetic information is passed on. Before a cell divides, the double helix unwinds and the two strands of the DNA molecule in the nucleus separate. Each strand is then used as a template for the construction of new DNA molecules. The replication of DNA is simple in theory, but much more complicated in reality. The precise details have only recently been worked out. Take a look of the animation called "Mechanism of Replication" to see what actually happens at the molecular level.
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This animation is available on YouTube .
- ID: 15530
- Source: www.dnai.org
- Download: mp4
15539. DNA base pairs
DNA base pairs
15543. James Watson and Francis Crick
James Watson and Francis Crick, Cambridge University, 1953
15474. RNA's role in the cell, James Watson
James Watson talks about RNA's role in the cell.
16022. James Watson and Francis Crick, 1953
The DNA molecule is shaped like a twisted ladder.
15678. Watson and Crick's 1953 Nature paper
James Watson and Francis Crick's 1953 Nature paper.
16442. Concept 20: A half DNA ladder is a template for copying the whole.
DNA polymerase and an experiment using nitrogen isotopes prove DNA replication.
Because it contains the directions for assembling the components of the cell, DNA is often thought of as the "instruction book" for assembling life.
15015. Francis Crick and James Watson in Cambridge.
1953 picture of Francis Crick (L) and James Watson (R) walking along the backs of King's College in Cambridge.
15677. DNA helix model closeup
Image of DNA helix model (closeup).