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.
CityRail, is a defunct railway brand for commuter rail and rail replacement bus services in and around Sydney, Newcastle and Wollongong, the three largest cities in New South Wales.The brand was established in 1988 and abolished in 2013 when it was superseded by Sydney Trains and NSW TrainLink.ll CityRail electric trains used 1500 V DC overhead electrification and travel on 1,435mm standard gauge tracks. Double deck rollingstock was first introduced in 1964 and after 1996, all electric multiple units were double deck. The CityRail network was divided into three sectors, based around three maintenance depots.