Question

why are the strands of a dna molecule said to be complementary?

Answer 1

any asnswers?

Answer 2

Because: A pairs with T, and G pairs with C.
One strand is 5'\(\rightarrow\)3', while the other is 3'\(\rightarrow\)5'

Answer 3

yes. because of the basepairing between G& C,A& T. This complementarity occurs.
for eg 5'-ATGC-3' will be complementary to 5'-GCAT-3'. ATGC is in one strand and GCAT in the other.