NEET Zoology Biotechnology Principles and Processes Questions Solved

NEET - 2015

The cutting of DNA at specific locations became possible with the discovery of 

(1) restriction enzymes

(2) probes

(3) selectable markets

(4) ligases

(1) Restriction enzymes are DNA cutting enzymes found in bacteria. A restriction enzyme recognizes and cuts DNA only at a particular sequence of nucleotides. For example, the bacterium Haemophilus aegyptius produces an enzyme named Hae III that cuts DNA wherever, it encounters the sequence.



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