In Q3, I could'nt comprehend the solution given in NCERT. could u pls send a simple solution to this question? Thank you

Q3. If the sequence of one strand of DNA is written as follows :

       5' – ATGCATGCATGCATGCATGCATGCATGC-3'

     Write down the sequence of complementary strand in 5' $\to$3' direction.
 

The DNA strands are complementary to each other with respect to base sequence. Hence, if the sequence of one strand of DNA is

5'- ATGCATGCATGCATGCATGCATGCATGC − 3’

Then, the sequence of complementary strand in direction will be

3'- TACGTACGTACGTACGTACGTACGTACG − 5’

Therefore, the sequence of nucleotides on DNA polypeptide in direction is

5'- GCATGCATGCATGCATGCATGCATGCAT− 3’