Question: When gel-running a plasmid DNA uncut by any enzyme, you usually see 3 bands as shown in lane 2. T…

When gel-running a plasmid DNA uncut by any enzyme, you usually
see 3 bands as shown in lane 2. They represent the linear,
supercoiled, and nicked DNA. According to the rate the bands
travel, which DNA form does a, b, and c represent for,
respectively? Briefly explain your answers.