This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
tRNA met would recognize 
Select and explain. 
A. AUG, B. UGC, C. GUG, D. GCU
A: AUG
Answer: A: AUG 
Explanation: initiation of protein synthesis can be studied as 4 steps Recognition stepSFormation of pre-initiation complex i.e.binding of ternary complex of met-tRNA Binging of mRNA to the pre-initiation complex to form 43s initiation complexThe 43s initiation complex is combined with the 60s ribosomal subunit to form 80s initiation complexRef: DM Vasudevan, 7th edition, page no: 600