RNA is a very similar molecule to DNA, and only has two chemical differences. The overall structure of RNA and DNA are immensely similarâone strand of DNA and one of RNA can bind to form a double helical structure.NA also uses a different set of bases than DNAâ adenine, guanine, cytosine and uracil, instead of adenine, guanine, cytosine and thymine. Chemically, uracil is similar to thymine, differing only by a methyl group, and its production requires less energy.
Signs and symptoms of extrahepatic bile duct cancer include jaundice and pain. These and other signs and symptoms may be caused by extrahepatic bile duct cancer or by other conditions. Check with your doctor if you have any of the following: Jaundice (yellowing of the skin or whites of the eyes). Pain in the abdomen.
The predominant symptoms are, 1  Bile duct infection (can cause chills and fever) 2  Fatigue. 3  Intense itching.  Malabsorption (especially of fat) leading to decreased levels of the fat-soluble vitamins, A, D, E, and 1  K. Severe jaundice (causing yellowing of the eyes and/or skin)  Signs of cirrhosis.