The cell nucleus is one of the largest organelles found in cells and also plays an important biological role. It composes about 10% of the total volume of the cell and is found near the center of eukaryotic cells. Its importance lies in its function as a storage site for DNA, our genetic material.
A monorail is a railway in which the track consists of a single rail. The term is also used to describe the beam of the system, or the vehicles traveling on such a beam or track.
A particular type of rail transit system which ascends a steep urban or mountain incline, having usually two cars sharing a single track, with the cars linked by a cable and an arrangement of pulleys such that the descending car assists in the hoisting of the ascending car, i.e. the two cars serve as counterweights for each other.