This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'UDP Glucose is formed from \nSelect and explain. \nA. Glucose-1-phosphate, B. Glycogen, C. Lactose phosphate, D. Starch', 'role': 'user'}, {'content': 'Answer: A \nExplanation: UDP glucose is formed from glucose-1-phosphate and UTP (uridine triphosphate) by the enzyme UDP-glucose pyrophosphorylase.\nReference: Vasudevan 7th\xa0 ed, pg 125', 'role': 'assistant'}]