45.Amylose的合成是藉由那一種酵素?
(A)Q-enzyme
(B)transglycosylases
(C)α-amylase
(D)β-amylase
統計: A(1495), B(4493), C(1245), D(929), E(0) #1837703
詳解 (共 10 筆)
幫6F補個題目
80 澱粉主成分多醣體 amylopectin 之支鏈生合成由何種酶所催化?
(A)Q-Enzyme
(B)Transacylase
(C)Transpeptidase
(D)Phosphorylase
已修正 寫錯重點
附上綠皮原文書提到transglycosylase的段落原文:
(p37 右半部)
Biosynthesis of the amylose fraction of starch is affected by enzymes known as transglycosylases. The reaction involves the lengthening of priming chains of identical composition by the addition of single glucose residues.
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Amylopectin, the branched component of starch, is formed from amylose by the action of a transglycosylase designated Q-enzyme
(這段落看不太懂 有請高手翻譯)
樓上,那這樣B選項是不是錯的?因為題目是問amylose的合成,不是amylpectin的合成
https://yamol.tw/item-44.Amylose+%E4%B9%8B%E7%B5%90%E6%A7%8B%E4%B8%BB%E8%A6%81%E7%82%BA%CE%B114%E4%B9%8B%E8%91%A1%E8%90%84%E7%B3%96%E9%80%A3%E7%B5%90%EF%BC%8C%E5%85%B6%E5%BD%A2%E7%8B%80%E7%82%BA%EF%BC%9A++%28A%29%CE%B2+s..-722511.htm
傳送門
44.Amylose 之結構主要為α-1,4之葡萄糖連結,其形狀為:
(A)β sheet
(B)Helix-like
(C)Double helix-like
(D)Hairpin-like
個人: B(1),疑問(1) 答對率:50 %