Chapter 27, Problem 9P

(a)

Summary Introduction

To determine: The positions in the anticodon are primary determinants of their codon specificity in the case of glycine.

Introduction:

More than one codon and transfer RNA (tRNA) are attached to amino acids. The four codons of glycine are (5ʹ) GGU, GGU, GGA, and GGC. These codons are attached to some specific anti- codons.

(b)

Summary Introduction

To determine: The anticodon-codon pairings that has wobble base pair.

Introduction:

Redundancy of genetic code allows the insertion of correct amino acids in the DNA sequence with regularity. In codons, only two nucleotides are needed to encode the correct amino acids and the sense of third codon have not changed, this property is termed as wobble. The wobble base- pairs are guanine- uracil, guanine-cytosine, -cytosine-guanine and adenine-uracil.

(c)

Summary Introduction

To determine: The anticodon-codon pairings in which all three positions exhibit strong Watson-Crick hydrogen bonding.

Introduction:

The Watson- Crick hydrogen bonding are seen between the two strands of DNA. These bondings are very weak bonding, but hydrogen bonding becomes strong if considered collectively.