Restriction endonucleases hydrolyses polynucleotide at
A
a random internal phosphodiester bond
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B
a phosphodiester bond within a specific sequence
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C
either terminal
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D
only the 5’ end.
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Solution
The correct option is B a phosphodiester bond within a specific sequence Restriction endonuclease is an enzyme produced chiefly by certain bacteria. This enzyme cleaves the phosphodiester bond within or near a specific base sequence.