Practice question

Orientation mapping checks whether insert integrated in forward or reverse direction relative to vector using asymmetric internal restriction site within insert. However when insertion occurs without orientation-specific asymmetry, or when insert lacks internal asymmetry, some digests may produce fragments of identical size irrespective of orientation. Specific patterns where same-size bands appear in both possible orientations indicate that enzyme combination does not distinguish direction, often due to centrally located site or symmetrical arrangement. Such scenario is described as right or correct orientation yielding same size bands.