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
Which step in translation is inhibited by Tetracycline in prokaryotes? 
Select and explain. 
A. Initiation, B. Binding of aminoacyl-tRNA to the "A" site on the ribosome, C. Peptide-bond formation, D. Translocation
B: Binding of aminoacyl-tRNA to the "A" site on the ribosome
Answer: B: Binding of aminoacyl-tRNA to the "A" site on the ribosome 
Explanation: Binding of aminoacyl-tRNA to the A sitea. The mRNA codon at the A site determines which aminoacyl-tRNA will bind.(1). The codon and the anticodon bind by base-pairing that is antiparallel (see Figure below).(2). Internal methionine residues in the polypeptide chain are added in response to AUG codons. They are carried by tRNAmMet , a second tRNA specific for methionine, which is not used for initiating protein synthesis.b. An elongation factor (EF-Tu in prokaryotes and eEF-1 in eukaryotes) and hydrolysis of GTP are required for binding.Tetracycline prevents aminoacyl-tRNA from binding to the "A" site on the ribosome. Streptomycin prevents the formation of the initiation complex, and erythromycin blocks translocation. Chloramphenicol will block peptide-bond formation in prokaryotic cells.Antiparallel binding of aminoacyl-tRNA to mRNA.