Answer:
AATAGGTACCCATGTGCA (original DNA sequence)
TTATCCATGGGTACACGT
Step-by-step explanation:
Adenine (A) pairs with Thymine (T). Guanine (G) pairs with Cytosine (C). There are 18 nucleotides in this sequence, as seen by the number of base pairs there are. Hydrogen bonds hold together the matching base pairs.