In an experiment in the laboratory, a small colored molecule is injected into one cell. Within minutes, the molecule has entered the adjacent cells. What type of junctions connect these cells?

Answer is gap junctions.

Explanation:

Gap junctions are regarded as specialized intercellular connection that allow the exchange of molecules between adjacent cells.

The gap functions are formed by two unrelated proteins known as the pannexin and the connexin.

The opposite of the gap junction is the tight junction, which formed an impermeable barrier to molecules or fluid.