Which statement about translational initiation is false?
A) In prokaryotes, ribosomes often bind the mRNA and can scan 5ʹ or 3ʹ until recognizing a Shine-Dalgarno sequence.
B) Viral mRNAs contain internal ribosome entry sites that allow ribosomes to bind to an internal site of the mRNA.
C) Initiation codons in prokaryotic cells are preceded by Shine-Dalgarno sequences.
D) 5ʹ 7-methylguanosine caps serve as the point of recognition and binding for ribosomes in eukaryotic cells.

Question

Quizplus · Accepted Answer

In prokaryotes, ribosomes bind to the mRNA at the Shine-Dalgarno sequence, which is upstream of the start codon, but they do not scan 5ʹ or 3ʹ to find it.

Which Statement About Translational Initiation Is False