Remember that nucleotides are complements. A good way to remember which goes with which is "Apples in Trees" and "Gas in Cars". That means A->T and C->G. So the complementary strand would be (assuming your strand is in the 5' to 3' orientation) 3'- T G A T A C T C G A T -5'
Chandni S.
I also remember the purines as (P)ure (A)s (G)old and always remember DNA is antiparallel!12/07/22