This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Molecular Genetics, Subject name: Biochemistry
Shine-Dalgarno sequence in bacterial mRNA is near: 
Select and explain. 
A. AUG codon, B. UAA codon, C. UAG codon, D. UGA codon
A: AUG codon
Answer: A: AUG codon 
Explanation: Ans. A. AUG codon(Ref: Harper 31/e page 395)Shine Dalgarno sequence is the marker sequence. The first AUG codon after Shine Dalgarno sequence is the start codon in bacteria. Similarly in eukaryotes there is Kozak sequence.