alleryIn prokaryotes, the small ribosomal subunit recognises the mRNA initiation site via the
ATATA box (typical)
BKozak sequence
CPribnow box
DShine-Dalgarno sequence
Answer & Solution
Correct answer: D. Shine-Dalgarno sequence
1. The Shine-Dalgarno sequence is a ribosome binding site present 6–8 bases upstream of the start codon in bacterial mRNA.
2. It base-pairs with the 16S rRNA of the 30S ribosomal subunit, positioning the AUG correctly.
3. Eukaryotes use the Kozak sequence instead.
_Source: Maharashtra Balbharati Std XII Biology, Ch 4 "Molecular Basis of Inheritance" §4.7_
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