Final answer:
The complementary base configuration for the DNA sequence CTAATGT is GATTACA, following the base pairing rules where A pairs with T, and C pairs with G.
Step-by-step explanation:
If one side of the DNA ladder includes the sequence CTAATGT, the complementary base configuration for this sequence will follow the rules of base pairing in DNA. Adenine (A) always pairs with thymine (T), and cytosine (C) pairs with guanine (G). Therefore, for the sequence CTAATGT, the complementary sequence would be GATTACA. This sequence would be oriented in a 3' to 5' direction to complement the original 5' to 3' orientation of the given sequence.