Which molecule is carried by $tRNA$ during the initiation of protein synthesis in eukaryotic organisms?

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?

Which of the following acts as a ribozyme in bacteria?

For every single amino acid incorporated in a peptide chain,$1$ $ATP$ and $2$ $GTP$ molecules are used.

The $DNA$ template strand is $3'-AAAAGTGACTAGTGA-5'$. During transcription,it produces an $mRNA$. Identify the anticodon on the $tRNA$ that recognizes the third codon of this $mRNA$.

In a polypeptide chain consisting of $125$ amino acids,if the $25^{th}$ amino acid codon mutates to $UAA$,what will happen?