Q.Why is tRNA called an adapter molecule?

Step 1. A codon's sequence of bases and a specific amino acid have no direct chemical affinity for one another -- nothing about the shape or chemistry of a codon 'attracts' its corresponding amino acid.

Step 2. tRNA solves this mismatch by physically linking the two: one end of the folded tRNA molecule (the acceptor end) is covalently charged with a specific amino acid, while the opposite end carries an anticodon loop that base-pairs directly with the matching codon on the mRNA.

Step 3. By simultaneously recognising the mRNA codon (via its anticodon) and delivering the correct amino acid (via its charged end), tRNA acts as a physical 'adapter' converting nucleic-acid sequence information into the correct amino-acid sequence of a growing polypeptide. …

Explain how tRNA physically connects two things (codon and amino acid) that have no chemical affinity fo …

• Describing what tRNA does without explaining WHY the term 'adapter' specifically applies -- the key point is that codon …