Which characteristic allows you to recognize a cell in interphase

The answer is the nucleus intact.

An intact nucleus in an intact cell. The nucleus is where DNA is kept in cells. In cell biology, the nucleus is a membrane-enclosed organelle found in eukaryotic cells. Eukaryotes usually have a single nucleus, but a few cell types, such as mammalian red blood cells, have no nuclei, and a few others including osteoclasts have many.