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Question 15

In a DNA molecule, which base is always found paired with A?

  1. Base C
  2. Base TCorrect answer
  3. Base G
  4. A second base A

Explanation

A and T are complementary partners, so wherever one strand carries A the strand opposite carries T at the same position. Pairing A with C or with G would break the fixed rule and would not give the regular fit that lets the two strands run alongside each other.

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Question 15: In a DNA molecule, which base is always found paired with A? · Genetics Basics · Questena