問題詳情

36. Which of the following reactions is/are catalyzed by a transketolase in the pentose phosphatepathway? Ⅰ.sedoheptulose-7-P + glyceraldehyde-3-P

ribose-5-P + xyulose-5-P II. erythrose-4-P + fructose-6-P 

 sedoheptulose-7-P + glyceraldehyde-3-P III. fructose-6-P + glyceraldebyde-3-P 

  xylulose-5-P + erythrose4-P
(A) I only
(B)II and IIl
(C) II only
(D) I and Ill
(E) I and II 

參考答案

答案：D
難度：計算中-1
書單：沒有書單，新增

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【加油(邀請:154179)】評論

※將核酮糖-5-磷酸(ribulose-5-phosphate) ⟷木酮糖-5-磷酸(xylulose-5-phosphate): 磷酸五碳糖差向異構酶(phosphopentose epimerase) ※將核酮糖-5-磷酸(ribulose-5-phosphate) ⟷核糖-5-磷酸(ribose-5-phosphate): 磷酸五碳糖異構酶(phosphopentose isomerase) ※木酮糖-5-磷酸(xylulose-5-phosphate)和核糖-5-磷酸(ribose-5-phosphate)⟷甘油醛3-磷酸(glyceraldehyde 3-phosphate)和景天庚酮糖-7-磷酸(sedoheptulose 7-phosphate): 轉酮醇酶(transketolase) ※甘油醛3-磷酸(glyceraldehyde 3-phosphate)和景天庚酮糖-7-磷酸(sedoheptulose 7-phosphate) ⟷ 果糖6-磷酸(fructose 6-phosphate)和赤藻糖-4-磷酸(erythrose 4-phosphate): 轉醛醇酶(transaldolase) ※赤藻糖-4-磷酸(erythrose 4-phosphate)和木酮糖-5-磷酸(xylulose-5-phosphate) ⟷ 果糖6-磷酸(fructose 6-phosphate)和甘油醛3-磷酸(glyceraldehyde 3-phosphate): 轉酮醇酶(transketolase)