This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Membrane Structure & Function, Subject name: Biochemistry
[{'content': 'The graph given below denotes the transport kinetics across the cell membrane. The solute is: \nSelect and explain. \nA. Oxygen, B. Sodium, C. Glucose, D. Chloride', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C. Glucosea. Rate of glucose entry is almost zero without the transporter molecule helping in facilitated diffusionb. Glucose concentration determines the rate of transport: Km can be calculated from the half maximal ratec. Km (glucose): 1.5mMd. Value of Km gives information regarding the affinity of the transporter to glucosee. Affinity is inversely proportional to Km.f. There is a favorable free energy for glucose transportg. Blood glucose concentration is roughly 65-90mg/dL', 'role': 'assistant'}]