How Do Eukaryotic Ribosomes Prevent False Starts at Inappropriate Parts

question 19

Multiple Choice

How do eukaryotic ribosomes prevent false starts at inappropriate parts of the mRNA?

• A) There is a consensus sequence, called the Kozak sequence, surrounding the start codon in eukaryotes.
• B) The Shine-Dalgarno sequence positions the ribosome properly, just as in prokaryotes.
• C) Only one start codon ever appears in eukaryotic mRNA, so false starts are not a problem.
• D) Nothing; false starts are quite common in eukaryotic translation.

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