Question

A linear strip of DNA has two restriction sites for the restriction enzyme EcoR1 and three restriction sites for restriction enzyme Hindll if the strip of DNA was incubated with the restriction enzymes then the cut DNA was collected and run on a electrophoretic gel, how many bands would be expected on the gel

Answer 1

There would be six bands on the electrophoretic gel.
The linear strip would be cut twice by the EcoR1 and thrice by the HindII. That would be an equivalent of 5 cuts on a linear piece that would result in 6 pieces.