(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.
The tongue also helps to produce speech by altering or stopping the flow of air through the mouth to produce the sounds of many consonants. The hard and soft palates form the roof of the mouth. On the anterior end of the mouth, the hard palate is formed by the inferior surface of the maxillae and palatine bones.These bones are covered with a thin layer of connective tissues and mucous membranes, which form small wrinkles.eeth are hard structures specialized for the biting and grinding of food (known as mastication, or chewing). They form a continuous row in the bottom of the mouth surrounding the tongue on the lateral and anterior sides, as well as another nearly identical row extending from the roof of the mouth.