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The first restriction endonuclease to be isolated was:
APst I
BHind II
CEcoR I
DBamH I
Answer & Solution
Correct answer: B. Hind II
1. Two enzymes restricting phage growth were found in 1963.
2. The one that cut DNA was named restriction endonuclease.
3. Hind II was the first such enzyme characterised.
_Source: NCERT Class 12 Biology, Ch 9 'Biotechnology : Principles and Processes'_
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