CHAPTER-5 MOLECULAR BASIS OF INHERITANCE
Q. 4 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:
The sequence of mRNA will be 5′-
AUGCAUGCAUGCAUGCAUGCAUGCAUGC-3′.
Explanation: In a RNA strand thymine is replaced with uracil.
The coding strand of mRNA is the same as that of DNA with the
only difference being uracil instead of thymine.
If the coding strand is 5′-
ATGCATGCATGCATGCATGCATGCATGC-3′
then the mRNA sequence will be 5′-
AUGCAUGCAUGCAUGCAUGCAUGCAUGC-3′.