Question
Biology Question on Molecular Basis of Inheritance
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
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 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