Multiple choice

A strand of DNA has the sequence 5′−ATTCCG−3′. The complementary strand for this is

  1. 5′−TAAGGC−3′

  2. 5′−ATTCCG−3′

  3. 5′−ACCTTA−3′

  4. 5′−CGGAAT−3'
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A Correct answer
Explanation

 5′−TAAGGC−3′ represents 5' to 3' pattern. Complementary strand of 5' to 3' strand is always in 3' to 5' direction.

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