多选题DNA polymerase I has（ ）。A3′→5′exonuclease activityB5′→3′exonuclease activityCproofreading activityDpolymerase activity
多选题
DNA polymerase I has（ ）。
A
3′→5′exonuclease activity
B
5′→3′exonuclease activity
C
proofreading activity
D
polymerase activity
参考解析
解析：
DNA聚合酶Ⅰ主要是对复制中的错误进行校读，对复制和修复中出现的空隙进行填补。该酶既是复制酶又是修复酶，有模板依赖性，有5′→3′聚合酶活性，也有3′→5′外切酶活性。
DNA聚合酶Ⅰ主要是对复制中的错误进行校读，对复制和修复中出现的空隙进行填补。该酶既是复制酶又是修复酶，有模板依赖性，有5′→3′聚合酶活性，也有3′→5′外切酶活性。
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名词解释题DNA聚合酶（DNA polymerase）