If the sequence of the coding strand in a transcription unit is written as follows:
$5'-ATGCATGCATGCATGCATGCATGCATGC-3'$. Write down the sequence of $mRNA$.

(N/A) The coding strand of $DNA$ has the same sequence as the $mRNA$ transcript,except that $Thymine$ $(T)$ in $DNA$ is replaced by $Uracil$ $(U)$ in $RNA$.
Given coding strand: $5'-ATGCATGCATGCATGCATGCATGCATGC-3'$.
By replacing $T$ with $U$,the $mRNA$ sequence is:
$5'-AUGCAUGCAUGCAUGCAUGCAUGCAUGC-3'$.