
DNA extraction+2-4
Authored by Chien Y
Biology
10th - 12th Grade
Used 9+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
在「DNA 的粗萃取」活動中,主要是依據何種性質將DNA析出?
熔點的不同
沸點的不同
溶解度的不同
分子大小不同
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
若改變DNA粗萃取實驗的最後步驟,以加水取代加冰酒精,則DNA是否可以凝聚而析出?
不可,因為DNA無法溶於酒精,卻會溶解在水中
不可,加入水使DNA分子互相排斥,而無法凝聚析出
可以,因為DNA無法溶於酒精,卻會溶解在水中
可以,因為DNA在稀釋至適當濃度的NaCl溶液中可以凝聚而析出
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
阿龍進行奇異果的DNA粗萃取,有關他在實驗過程中的處理,下列何者正確?
在奇異果泥中加入數滴洗碗精以溶解雜質
在奇異果泥中加入10%濃食鹽水以破壞細胞膜
在奇異果泥中加入一些新鮮鳳梨汁以分解蛋白質
在奇異果泥中加入95%冰酒精以溶解DNA
加入各種物質時均須充分攪拌以增加反應速率
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
在DNA粗萃取實驗中,下列何者可以取代實驗所使用的嫩精或鳳梨汁?
果糖
蛋白質水解酶
RNA水解酶
福馬林
DNA水解酶
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
1.)木瓜酵素、2.)食鹽溶液、3.) 95%冷凍酒精。以上溶液在DNA粗萃取實驗中的使用先後順序為何?
123
132
213
231
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
有關DNA粗萃取實驗活動,下列敘述何者錯誤?
添加嫩精的目的是要分解蛋白質
添加蒸餾水可促使研磨後的細胞破裂
高濃度食鹽溶液可促使核酸溶於溶液中
添加95%冰酒精後,纏繞在玻棒上的是一條DNA分子
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列有關DNA萃取的敘述,何者正確?
從洋蔥與大腸桿菌中萃取出的DNA由不同種類的核苷酸組成
清潔劑的作用為使細胞破裂,但洋蔥細胞具細胞壁因此清潔劑沒用
萃取洋蔥的DNA時,使用木瓜酵素去除細胞壁
從洋蔥葉片與莖中可萃取出具相同序列的DNA
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