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Biology · Principles and Processes in Biotechnology

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Given below are two statements:\n Statement I: Palindromes in DNA are sequence of base pairs that read the same on the two strands when orientation of reading is kept the same (\( 5' \rightarrow 3' \)).\n Statement II: EcoRI cuts the DNA strands directly at the exact center of the palindrome site, leaving completely blunt ends. \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 EcoRI cuts a little away from the center of the palindrome, leaving sticky ends (overhanging single strands), not blunt ends.
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