hce_kmu
110年
普通生物及生化概論
第 68 題
Which of the following statements about glycogen is FALSE?
- A Glucose-6-phosphate is released from nonreducing ends of the glucose polymer by the action of the enzyme glycogen phosphorylase.
- B In glycogen breakdown, it involves sequential phosphorolytic cleavages of α(1→4) bonds.
- C Glycogen is the storage polysaccharide in skeletal and liver cells.
- D Glycogen is a polymer of glucose in α(1→4) linkages with α(1→6) linked branches.
- E The breakdown of glycogen in skeletal muscle ultimately enters glycolysis to generate ATP.
思路引導 VIP
在肝醣分解的過程中，磷酸化酶會利用磷酸根來切斷葡萄糖分子間的鍵結。請試著回想，在肝醣長鏈末端的葡萄糖中，參與 $\alpha(1\to4)$ 糖苷鍵結的是哪一個碳原子？當磷酸根進攻並取代這個鍵結時，它最直接會接在哪個位置呢？