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: Ophthalmology
[{'content': 'The major function of Major Intrinsic Protein 26 (MIP–26) is – \nSelect and explain. \nA. Glucose transport in lens, B. Transport of water in lens, C. Diffusion barrier, D. Capsule of lens', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Major intrinsic protein of the lens belongs to the super .family of aquaporins and is classified as aquaporin 0. MIP 26 or aquaporin 0 is permeable to water (water channels) and glycerol (glycerol channels). It serves two major functions to maintain the transparency of the lens\nTransport of water across the lens\nTransport of glycerol across the lens\nAquaporin 0 or MIP mutations have been postulated to result in the formation of cataracts (loss of transparency of lens).', 'role': 'assistant'}]