Chapter 18.5, Problem 52PP

(a)

Interpretation Introduction

Interpretation: Whether the given statement is described as primary, secondary, tertiary or quaternary protein structure should be indicated.

Hydrogen bonding present between the amino acid in the same polypeptide results a coiled shape to the protein.

Concept Introduction: Proteins are polymeric biomolecules which are formed by the polymerisation of amino acids. Amino acids are the organic molecules with $–{\text{NH}}_{\text{2}}$ and −COOH functional groups bonded on same carbon atom of the molecule.

They polymerise by peptide linkage to form dipeptide, oligopeptide and polypeptide molecules. Each peptide bond formation is a condensation reaction that occurs with the elimination of water molecule.

(b)

Interpretation Introduction

Interpretation: Whether the given statement is described as primary, secondary, tertiary or quaternary protein structure should be indicated.

Hydrophilic amino acids move to the polar aqueous environment present outside the protein.

Concept Introduction: Proteins are polymeric biomolecules which are formed by the polymerisation of amino acids. Amino acids are the organic molecules with $–{\text{NH}}_{\text{2}}$ and −COOH functional groups bonded on same carbon atom of the molecule.

They polymerise by peptide linkage to form dipeptide, oligopeptide and polypeptide molecules. Each peptide bond formation is a condensation reaction that occurs with the elimination of water molecule.

(c)

Interpretation Introduction

Interpretation: Whether the given statement is described as primary, secondary, tertiary or quaternary protein structure should be indicated.

An active protein contains four subunits.

Concept Introduction: Proteins are polymeric biomolecules which are formed by the polymerisation of amino acids. Amino acids are the organic molecules with $–{\text{NH}}_{\text{2}}$ and −COOH functional groups bonded on same carbon atom of the molecule.

They polymerise by peptide linkage to form dipeptide, oligopeptide and polypeptide molecules. Each peptide bond formation is a condensation reaction that occurs with the elimination of water molecule.