Final answer:
The complementary DNA strand to TACCCGATT is ATGGGCTAA, following the base pairing rule where A pairs with T and C pairs with G.
Step-by-step explanation:
If the sequence of bases along one portion of a DNA strand was TACCCGATT, then the sequence at that spot on the complementary DNA strand would be ATGGGCTAA. This is because DNA strands are antiparallel and complementary to each other in terms of their nucleotide bases.
In DNA, adenine (A) always pairs with thymine (T), and cytosine (C) always pairs with guanine (G). Therefore, by knowing the sequence of one strand, we can determine the sequence of its complementary strand by finding the complementary nucleotide for each base in the original sequence.