One of the major differences between DNA and RNA is the sugar, with 2-deoxyribose being replaced by the alternative pentose sugar ribose in RNA. The four bases found in DNA are adenine (abbreviated A), cytosine (C), guanine (G) and thymine (T).ne of the major differences between DNA and RNA is the sugar, with 2-deoxyribose being replaced by the alternative pentose sugar ribose in RNA. The four bases found in DNA are adenine (abbreviated A), cytosine (C), guanine (G) and thymine (T).
Common bile duct stone, also known as choledocholithiasis, is the presence of gallstones in the common bile duct (thus choledocho- + lithiasis). This condition causes jaundice and liver cell damage, and requires treatment by cholecystectomy and/or ERCP. 1  1 Signs and symptoms.  2 Causes.
Bile is made in the liver. It contains a mix of products such as bilirubin, cholesterol, and bile acids and salts. Bile ducts are drainage pipes that carry bile from the liver to the gallbladder and from the gallbladder to the small intestine. A variety of diseases can affect your bile ducts. All block the bile ducts in some way, which is why the various diseases cause similar symptoms.