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Question

DNA polymerases are generally used in DNA replication


A

To cut the helix at certain places

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B

For proofreading

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C

For breaking and joining pieces of one DNA strand

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D

For adding carbonyl compound

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Solution

The correct option is B

For proofreading


Proofreading allows DNA polymerase to check each nucleotide during DNA synthesis and excise mismatched nucleotides in the 3´ to 5´ direction.


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