
10分鐘小測:第56章 天然聚合物
Authored by Chemistry Aristo
Chemistry
9th - 12th Grade

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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
指示:第1和2題是關於葡萄糖的化學結構,葡萄糖分子是澱粉和纖維素的基本單位。
圖中顯示葡萄糖的化學結構(以開鏈的形式展示)。這種形式的葡萄糖存有下列哪些官能基?
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
指示:第1和2題是關於葡萄糖的化學結構,葡萄糖分子是澱粉和纖維素的基本單位。
參看圖中所示的葡萄糖結構,這種形式的葡萄糖含有多少個手性碳原子?
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
纖維素的部分結構和甲殼素的部分結構如圖顯示。下列有關纖維素和甲殼素的單體在結構上差異的陳述,哪項正確?
A. 在β-葡萄糖結構中C-2位置上的是羥基,而在N-乙酰氨基葡萄糖結構中C-2位置上的是乙酰氨基。
B. 在β-葡萄糖結構中C-3位置上的是羥基,而在N-乙酰氨基葡萄糖結構中C-3位置上的是乙酰氨基。
C. 在β-葡萄糖結構中C-4位置上的是羥基,而在N-乙酰氨基葡萄糖結構中C-4位置上的是乙酰氨基。
D. 在β-葡萄糖結構中C-5位置上的是羥基,而在N-乙酰氨基葡萄糖結構中C-5位置上的是乙酰氨基。
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪項有關甲殼素結構的描述正確?
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪些有關纖維素和甲殼素的陳述正確?
(1) 它們都是由以葡萄糖作為基礎的單體所構成。
(2) 它們都對提供結構上的支撐很重要。
(3) 它們都存在於真菌的細胞壁中。
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪項陳述正確解釋為甚麼纖維素不溶於水?
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪些有關纖維素結構的陳述正確?
(1) 在纖維素的聚合物鏈中,β-葡萄糖單位之間以酯鍵合互相連結。
(2) 纖維素的聚合物鏈呈長而平坦的絲帶狀。
(3) 纖維素的聚合物鏈以分子內氫鍵和分子間氫鍵互相牽引。
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