Discuss the following analogy(相似): “The differences between transporting a ligand by a channel or a carrier protein are like the differences between crossing a river by a bridge or a ferry(摆渡)."

【参考答案】

答: 通道蛋白进行的物质运输就像是行人过桥。载体蛋白进行的物质运输如同行人通过摆渡过河。