Question

How many hydrogen bonds exist between this DNA strand and its complementary strand? 5'-AGGCCTT-3 Number

Answer 1

We know that, 3 hydrogen bonds exist between Guanine (G) and Cytosine (C) in a DNA strand while 2 hydrogen bonds exist between Adenine (A) and Thymine (T).

Hence, For the given strand, Complementary strand will be: 3'-TCCGGAA-5'

So, there are 3 (adenine-thymine) pairs and 4 (guanine-cytosine) pairs. Therefore total no.of hydrogen bond

is given by= 3 x 2 + 4 x 3 = 18 hydrogen bonds.

So 18 hydrogen bonds will be there in given DNA strand.