DNA Structure and Replication Lab

Teaching model. The fork moves much slower than a real one, primers are drawn about ten times longer than real (about 10 nucleotides), and enzymes are drawn huge. Counts and lengths are converted to real nucleotides and real seconds using about 1000 nucleotides per second per fork in bacteria and about 50 in eukaryotes.

Densities are those reported for E. coli DNA in cesium chloride (light 1.710, hybrid 1.717, heavy 1.724 g/mL). Separated single strands are denser than double strands; their positions here are approximate.

The picture updates as you type. After you answer, or press Show worked solution, the solution builds step by step with a common mistake to avoid.