Question

Suppose that RNA polymerase was transcribing a eukaryotic gene with several introns all contained within the coding region. In what order would the RNA polymerase encounter the elements in the DNA sequence of the gene?

Answer 1

Answer: synthesize a pre-rRNA 45S (35S in yeast), which matures and will form the major RNA sections of the ribosome. RNA polymerase II synthesizes precursors of mRNAs and most snRNA and microRNAs. RNA polymerase III synthesizes tRNAs, rRNA 5S and other small RNAs found in the nucleus and cytosol.

Explanation:

Answer 2

The CORRECT order of the elements in DNA sequence are promoter sequence >> 5' UTR >> start codon >> splice donor site >> 3' UTR.

• A promoter gene sequence is a DNA sequence to which proteins bind in order to start transcription.

• The 5′ untranslated region (5′ UTR) is the DNA sequence localized directly upstream from the first codon of an mRNA.

• The start codon (AUG) is the first codon in mRNA, which codes for methionine in eukaryotes.

• The splice donor sites refer to the sites at the 5' ends of the introns during RNA splicing.

• The 3′ untranslated region (3′ UTR) is the DNA sequence localized downstream from the last codon (stop codon) of an mRNA.

In conclusion, the CORRECT order of the elements in DNA sequence are promoter sequence >> 5' UTR >> start codon >> splice donor site >> 3' UTR.

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