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Biology · Principles and Processes in Biotechnology

हिन्दी

Given below are two statements:\n Statement I: Cohen and Boyer isolated an antibiotic resistance gene by cutting out a piece of DNA from a plasmid of Salmonella typhimurium in 1972.\n Statement II: Cutting of DNA at specific locations became possible only with the discovery of DNA ligase enzyme. \nIn the light of the above statements, choose the most appropriate answer from the options given below:

  1. Both Statement I and Statement II are correct.
  2. Both Statement I and Statement II are incorrect.
  3. Statement I is correct but Statement II is incorrect.
  4. Statement I is incorrect but Statement II is correct.

Correct answer · Option 3

Statement I is correct but Statement II is incorrect.

Explanation

Statement I is correct. Statement II is incorrect because cutting DNA at specific locations became possible with 'restriction enzymes' (molecular scissors), not DNA ligase.
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