Help Please!?

A single strand of DNA has a total of 18 bases.13 of them are Guanines and 5 are Adenines. How many Hydrogen bonds would form if this fragment is bonded to a complementary strand?

I think its 49, because A -T bonding results in 2 hydrogen bonds and G -C result in 3...but I'm not sure.

Can some please help me, and explain this. Thank You = )

3 Answers

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  • 1 decade ago
    Favorite Answer

    OK I'l draw it out for you!

    G G G G G G G G G G G G G A A A A A

    3 3 3 3 3 3 3 3 3 3 3 3 3 2 2 2 2 2

    C C C C C C C C C C C C C T T T T T

    So, the bonds add up to 13(3) + 5(2) = 49. You're right!

  • 1 decade ago

    Correct, G-C base pairing has 3 H bonds and A-T has 2.

    So 49 is correct answer

  • Anonymous
    1 decade ago

    Your answer is correct. You have explained it properly.

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