If a coding strand of DNA has the sequence 5'-AAT-3', what would be the corresponding codon on the mRNA?
Understand the Problem
The question asks us to determine the corresponding mRNA codon given a DNA coding strand sequence using the properties of transcription and base pairing rules.
Answer
The corresponding mRNA codon is 5'-AAU-3'.
If the coding strand of DNA has the sequence 5'-AAT-3', the corresponding codon on the mRNA would be 5'-AAU-3'.
Answer for screen readers
If the coding strand of DNA has the sequence 5'-AAT-3', the corresponding codon on the mRNA would be 5'-AAU-3'.
More Information
During transcription, mRNA is synthesized using the template strand of DNA. The sequence of the mRNA is complementary to the template strand, but identical to the coding strand, except that uracil (U) replaces thymine (T).
Tips
A common mistake is forgetting to replace Thymine (T) with Uracil (U) when converting a DNA sequence to an mRNA sequence.
Sources
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