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.
When I see babies with chapped lips, my first question is whether or not they use pacifiers or take a baby bottle to bed. These should be avoided -- the constant moisture and saliva around the mouth leads to chapping and skin rashes. The same goes for lip licking and chewing bubble gum -- habits I often see in school-age children.