If the sequence of one strand of $DNA$ is written as follows:
$5'- ATGCATGCATGCATGCATGCATGCATGC-3'$
Write down the sequence of the complementary strand in the $5' \rightarrow 3'$ direction.

(D) The $DNA$ strands are complementary to each other due to base pairing rules ($A$ pairs with $T$,$G$ pairs with $C$).
Given strand $(5' \rightarrow 3')$: $5'- ATGCATGCATGCATGCATGCATGCATGC-3'$
The complementary strand runs in the opposite direction $(3' \rightarrow 5')$:
$3'- TACGTACGTACGTACGTACGTACGTACG-5'$
To write this sequence in the $5' \rightarrow 3'$ direction,we reverse the order of the complementary strand:
$5'- GCATGCATGCATGCATGCATGCATGCAT-3'$