(biochemistry) a long linear polymer of nucleotides found in the nucleus but mainly in the cytoplasm of a cell where it is associated with microsomes; it transmits genetic information from DNA to the cytoplasm and controls certain chemical processes in the cell. see more on Definitions.net Â».
It forms a partition between the nasal passages and the mouth. On the anterior portion of the roof of the hard palate are the rugae, irregular ridges in the mucous membrane that help facilitate the movement of food backwards towards the pharynx.This partition is continued deeper into the mouth by a fleshy extension called the soft palate.he hard palate is a thin horizontal bony plate of the skull, located in the roof of the mouth.
A very simple labelled diagram of the mouth (anterior view of the mouth) is shown below, followed by notes about each of the structures labelled. This is useful for introductory level courses but doesn't include all of the parts of the mouth that are involved in the initial stages of the digestion process.he lower-lip is also known as the inferior lip and is the lip closest to the chin (as opposed to closest to the nose). 3. Hard Palate. The hard palate extends over most of the roof of the mouth. The solid structure of the hard palate is formed by the maxillae and palatine bones.