Which of the following elements would not be typically found in an mrna molecule? 5′ untranslated regionpromoter3′ untranslated regionstart and stop codonsprotein-coding region

The correct answer is: Promoter

Promoter is a sequence on DNA molecule that initiates transcription of a particular gene (RNA polymerase binds to a promoter).

mRNA is a product of transcription from DNA and it has  

5′ untranslated region- after the start codon, usually responsible for regulation of translation

Protein-coding region- composed of codons that caries the information for protein synthesis (translation).  

Start (the first codon, usually AUG triplet) and stop codons (the last codon for the termination of translation)

3′ untranslated region-after the stop codon, usually responsible for mRNA stability and localization.

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