In some vehicles the retractor â not the latchplate â provides the locking part needed to keep a car seat in place at all times. The purpose of the retractor is to store the excess webbing. These retractors are usually present when a non-locking latchplate (sliding, sewn-on, or dynamic locking) is present.
In cell biology, the nucleus (pl. nuclei; from Latin nucleus or nuculeus, kernel) is a membrane-enclosed organelle found in eukaryotic cells. It contains most of the cell's genetic material, organized as multiple long linear DNA molecules in complex with a large variety of proteins such as histones to form chromosomes.The genes within these chromosomes make up the cell's nuclear genome.t contains most of the cell's genetic material, organized as multiple long linear DNA molecules in complex with a large variety of proteins such as histones to form chromosomes.
Nucleus [edit]. The nucleus contains genetic material or DNA in the form of chromatin, or, during mitosis or late interphase, chromosomes. All transcription and replication of genetic material takes place within the nucleus, as does mRNA processing.entral Vacuole The central vacuole is found only in plant cells. It is filled with water and is pressurised, like a balloon. This forces all the other organelles within the cell out toward the cell wall. This pressure is called turgor pressure and is what gives plants their crisp and firm structure.