This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of protein and amino acid, Subject name: Biochemistry
The conjugation of bilirubin to glucuronic acid in the liver 
Select and explain. 
A. Conves a hydrophilic compound to a hydrophobic one, B. Conves a hydrophobic compound to a hydrophilic one, C. Enables the bilirubin molecule to cross the cell membrane, D. Is increased during neonatal jaundice
B: Conves a hydrophobic compound to a hydrophilic one
Answer: B: Conves a hydrophobic compound to a hydrophilic one 
Explanation: In liver bilirubin which is a hydrophobic compound is conjugated with glucuronic acid, to make it water soluble. The fuher transpo of bilirubin into bile is an active process Only unconjugated bilirubin elevates in neonatal/hemolytic jaundiceRef: Textbook of biochemistry for medical students, seventh edition, page no: 277