第二章 Flashcards

1
Q

DNA由两条___组成

A

多聚核苷酸链

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2
Q

Chargeff规则

A

1、不同生物个体的DNA其碱基组成不同2、同一个体不同器官或不同组织具有相同的碱基组成3、对于一特定组织的DNA,其碱基组分不分年龄、营养状态、环境而变化4、对于一特定生物体而言A=T
C=G A:腺嘌呤G:鸟嘌呤

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3
Q

DNA两条核苷酸链的平行方式

A

反向平行

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4
Q

DNA双链内侧为___,外侧为___

A

碱基;核糖和磷酸

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5
Q

DNA骨架

A

脱氧核糖和磷酸基团

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6
Q

每一个螺旋有多少个碱基对

A

10.5

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7
Q

___维持DNA双螺旋的稳定

A

碱基的疏水作用力和氢键

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8
Q

每两个相邻碱基之间的距离

A

0.34nm

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9
Q

A-DNA B-DNA

A

右手螺旋

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10
Q

Z-DNA

A

左手螺旋

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11
Q

RNA中寿命最短的是哪种

A

mRNA

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