Assume that two strands of DNA have been separated and that the base sequence on one strand is TTGC. What is the sequence of bases on the complimentary strand?

A. GCTA
B. GTAC
C. CGTT
D. AACG

The complimentary strand of DNA will have the same base sequence, but with the complementary bases. So the sequence for the complimentary strand would be AACG.

Therefore, the answer is D) AACG.