In terms of the polycistronic composition of mRNAs and the presence or absence o

Question

In terms of the polycistronic composition of mRNAs and the presence or absence of Shine-Dalgarno sequences, compare and contrast bacterial, archaeal, and eukaryotic mRNAs. Select the three correct answers

Eukaryotic mRNAs can be either polycistronic or monocistronic, whereas bacterial and archaeal mRNAs are monocistronic.

Introns are present in eukaryotic and archaeal genes, but are absent from most bacterial genes.

All archaeal and bacterial mRNAs contain a 5' UTR and contain a Shine-Dalgarno sequence.

Bacterial and archaeal mRNAs can be either polycistronic or monocistronic, whereas eukaryotic mRNAs are monocistronic.

Some archaeal mRNAs do not contain a 5' UTR and do not contain a Shine-Dalgarno sequence.

Bacterial and archaeal mRNAs that contain a 5' UTR also contain Shine-Dalgarno sequences, whereas eukaryotic sequences do not contain Shine-Dalgarno sequences.

Explanation / Answer

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