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The restriction enzymes that are used in...

The restriction enzymes that are used in construction of recombinant DNA molecule are endonucleases which cut the DNA at 'specific recognition sequence'. What would be the disadvantage if they would not cut the DNA at specific-recognition sequence?

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If the sites instead of at specific sites, then the DNA fragments obtained will not have .stickt ends.. In the absence of sticky ends, construction of recombnant DNA molecule would not be possible.
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