(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.
What cause the roof of your mouth to itch? Quick Answer. Itching of the roof of the mouth is a common symptom of allergic rhinitis, a condition in which the immune system reacts to external or internal allergens, such as pollens, mold and dust mites, according to Avera Health. Additional symptoms include nasal congestion, watering eyes and sneezing.