Question

In the base sequence, one strand of DNA is GAT, TAG ,CAT, GAC. what shall be the sequence of its complementary strand?

• A. CAT, CTG, ATC, GTA
• B. GTA, ATC, CTG, GTA
• C. ATC, GTA, CTG, GTA
• D. CTA, ATC, GTA, CTG

Answer 1

The correct option is D CTA, ATC, GTA, CTG

• The complementary strand will have the sequence CTA, ATC, GTA, CTG because in DNA, the bases adenine and guanine form hydrogen bonds with their complementary pyrimidines thymine and cytosine, respectively.
• This is called a complementary base pairing.
  

So, the correct answer is option D.