Question

If the sequence of the coding strand in a transcription unit is written as follows:

5'-ATGCATGCATGCATGCATGCATGCATGC-3'

Write down the sequence of mRNA.

Answer 1

If the coding strand in a transcription unit is

5'-ATGCATGCATGCATGCATGCATGCATGC-3'

Then, the template strand in 3' to 5' direction would be

3'-TACGTACGTACGTACGTACGTACGTACG-5'

It is known that the sequence of mRNA is the same as the coding strand of DNA.

However, in RNA, thymine is replaced by uracil.

Hence, the sequence of mRNA will be

5'-AUGCAUGCAUGCAUGCAUGCAUGCAUGC-3'