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.
The key to healing dry lips is to understand the reason why theyâre chapping. The skin on your lips is uniquely fragile and requires special care. Once you understand the reason behind the problem, you can finally heal your dry lips for good! Chapped lips have four main causes: Environmental chapping from harsh weather and wind.