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Question

DNA fragments with sticky ends are not allowed to undergo self ligation by

A
Unwindase
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B
Single strand binding proteins
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C
Gyrase
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D
Alkaline phosphatase
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Solution

The correct option is D Alkaline phosphatase
The correct option is D.
DNA fragment with sticky end are not allowed to undergo self ligation by Alkaline phosphatase. Alkaline phosphatase is a useful enzyme in genetic engineering, it remove 5 phosphase group from DNA and RNA fragments. It also removes the 5 phosphase groups from nucleotide and proteins.

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