This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Biochemistry
[{'content': 'Insulin storage in the body requires which ion? \nSelect and explain. \nA. Cu, B. Zn, C. Mo, D. Se', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Zinc is involved in the insulin packaging, secretion, and signaling Zinc in pancreatic beta cells binds to several insulin molecules, six to be exact, forming an insulin hexamer for storage.Ref: DM Vasudevan, 7th edition, page no: 319', 'role': 'assistant'}]