Chapter 22, Problem 22.113EP

(a)

Interpretation Introduction

Interpretation: The validation of the given statement that four hairpin loops are always present in a tRNA molecule has to be stated.

Concept introduction: 2-D structure of tRNA is “clover leaf” like, a shape produced by the molecule’s folding and twisting into regions of parallel strands and regions of hairpin loops.

(b)

Interpretation Introduction

Interpretation: The validation of the given statement that the anticodon site involves the hairpin loop opposite the open end has to be stated.

Concept introduction: 2-D structure of tRNA is “clover leaf” like, a shape produced by the molecule’s folding and twisting into regions of parallel strands and regions of hairpin loops.

(c)

Interpretation Introduction

Interpretation: The validation of the given statement that the amino acid attachment site involves the tRNAs $\text{5'}$ end has to be stated.

Concept introduction: 2-D structure of tRNA is “clover leaf” like, a shape produced by the molecule’s folding and twisting into regions of parallel strands and regions of hairpin loops.  The $\text{3'}$ end of the open part of the cloverleaf structure is covalently bonded to the tRNA.

(d)

Interpretation Introduction

Interpretation: The validation of the given statement that the amino acid hydrogen bonds to its attachments site has to be stated.

Concept introduction: 2-D structure of tRNA is “clover leaf” like, a shape produced by the molecule’s folding and twisting into regions of parallel strands and regions of hairpin loops.  The carboxyl group of the amino acid reacts with the $\text{3'}$ OH group on the terminal nucleotide.