Question

Identify the labels A, B and C in the given structure of tRNA and select the correct option.

• A. $\begin{array}{cccc}A& B& C& \\ \text{Anticodon loop}& T\psi Cloop& \text{AA binding site}& \end{array}$
• B. $\begin{array}{cccc}A& B& C& \\ \text{AA binding site}& T\psi Cloop& \text{Anticodon loop}& \end{array}$
• C. $\begin{array}{cccc}A& B& C& \\ \text{AA binding site}& \text{DHU loop}& \text{Anticodon loop}& \end{array}$
• D. $\begin{array}{cccc}A& B& C& \\ \text{AA binding site}& \text{DHU loop}& T\psi Cloop& \end{array}$

Answer 1

The correct option is B $\begin{array}{cccc}A& B& C& \\ \text{AA binding site}& T\psi Cloop& \text{Anticodon loop}& \end{array}$

This is the "clover leaf-like" two dimensional structure of tRNA. A represents amino acid (AA) binding side which facilited by OH group. B represents $t\psi c$ loop (thymine-pseudouridine-cytidine residues) for binding with ribosome. C represents the anticodon loop that has bases
complementary to the code in mRNA.