Answer
DNA is always read from the 5' end. Therefore, the circle can be attached only to the beginning of the given sequence, which forms the 5' end. The complementary strand, which contains complementary nucleotides (3'CCTAG5') to the template strand, runs in the 3' to 5' direction, which begins with the square.
Work Step by Step
To deduce the sequence of the complementary strand, the DNA base pairing rule is used, that is, the nucleotide adenine in the template strand pairs with thymine in the complementary strand, whereas cytosine in the template strand pairs with guanine in the complementary strand to make the DNA double helix.