Chapter 23, Problem 36A

Interpretation Introduction

Interpretation:

The name of five parts of the body that contain structural proteins should be determined.

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.

Answer to Problem 36A

The name of five parts of the body that contain structural proteins are ligaments, bone, tendons, skin and, hair.

Explanation of Solution

The most abundant class of proteins present in nature are known as structural proteins. These are fibrous proteins such as collagen that is utilized in the applications of cell structure. Structural proteins provide structural support to organisms for their survival. These proteins maintain the shape of cell, structure and also consist of structural elements in connective tissues such as bones in vertebrates and cartilage.

Structural proteins are elastin, collagen and keratin etc. Keratins are found in hair, feathers, beaks etc. Elastin and Collagens are found in connective tissues such as ligament and tendons. Structural proteins are also found in skin such as Collagens.