How many nucleotides in $tRNA$ are referred to as anticodons?

$A$: In bacterial translation mechanism,two $tRNA$ are required for methionine.
$R$: $AUG$ codes for methionine and it shows nonambiguity.

In a cell,protein synthesis occurs by the linking together of amino acids. The base sequence of $mRNA$ defines the primary structure of proteins because

Which of the following $rRNAs$ acts as structural $RNA$ as well as ribozyme in bacteria (in $S\ rRNA$)?

Give scientific reasons: It is essential that $tRNA$ binds to both amino acids and $mRNA$ codon during protein synthesis.

It has been found in many cells that ribosomes occur in chains along $mRNA$ molecules. What is the advantage of this arrangement as compared to a situation in which ribosomes occur singly?