DNA. complementary DNA (cDNA), copy DNA DNA transcribed from a specific RNA through the action of the enzyme reverse transcriptase. mitochondrial DNA (mtDNA) the DNA of the mitochondrial chromosome, existing in several thousand copies per cell and inherited exclusively from the mother.
Castor Oil. Castor oil is another good treatment for dry and chapped lips. Simply apply castor oil to your lips several times a day. You can also make a soothing treatment using one teaspoon of castor oil, one teaspoon of glycerin and a few drops of fresh lemon juice.
Dry, chapped and peeling lower lip. I have been suffering from dry, chapped and peeling lips (mainly my lower lip) for quite a while now (more than 3 years). I have started to get worried about this as my lower lip doesn't seem to be getting better. My lower lip is always peeling.