From the following list, choose all the parts that are present in an mRNA that is ready to be translated.

Question

A. Promoter Sequence

B. Introns

C. Untranslated regions (one at 5' one at 3')

D. 5' cap

E. Poly(A) tail

F. Exons

Answer 1

The Answer is F. Exons

A. Promoter Sequence: This is simply the region that the transcription factors and RNA pol. touch down on to begin transcription. Remember that translation starts with the start codon AUG, which can be many nucleotides down field from the promoter.

B. Introns: These sequences are spliced out and therefore not translated

C. UTR's: The name speaks for itsself

D. 5' methyl cap: Used to protect the mRNA from degradation. Also, not a nucleotide to even be translated

E. POLy (A) tail: Used to protect the mRNA from degradation. The STOP codon found way upstream of this region