Glucose and Dialysis tubing

用戶36244

2007-02-10 7:51 am

If glucose solution is placed into dialysis tubing (透析管) at distilled water, will the water level rises inside the dialysis tubing? The following link said that glucose is small enough to pass through the tubing, so the water potential between the two is the same, and no net water movement. But does not the tubing only let small molecules pass through it? Glucose is not too large?

http://hk.knowledge.yahoo.com/question/?qid=7006090703550

回答 (1)

史迪仔Fans

2007-02-10 8:24 am

✔ 最佳答案

其實我唔係好清楚你唔明O的乜O野,因為所有問題O既答案你已經寫晒出O黎.
1. Glucose is small enough to pass through dialysis tubing. It is the smallest structure for sugar, that's why its structure is called monosaccharide (單糖).
2. Maltose is disaccharide (雙糖), structure like two glucose linked together.
3. Starch is polysaccharide (多糖), its structure is too large to pass through dialysis tubing. If it is starch solution inside and pure water outside, water level rise inside.
4. The job for amylase is to speed up the transformation between maltose and starch, that's why amylase cannot decompose starch into glucose.

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