BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Fibrous protein collagen in its natural form has a Quaternary structure. Other examples of proteins with quaternary structure include hemoglobin, DNA polymerase, and ion channels. So, the correct answer is ‘Quaternary structure’.

Detailed explanation-2: -Fibrous proteins, also called scleroproteins, are long filamentous protein molecules that form one of the two main classes of tertiary structure protein (the other being globular proteins).

Detailed explanation-3: -There are two major categories of proteins with quaternary structure-fibrous and globular.

Detailed explanation-4: -There are two main classes of protein tertiary structure: Fibrous proteins are generally composed of long and narrow strands and have a structural role (they are something) Globular proteins generally have a more compact and rounded shape and have functional roles (they do something)

Detailed explanation-5: -Fibrous proteins consist of many superfamilies including keratin, collagen, elastin, and fibrin. Collagen is the most abundant of these proteins which exists in vertebrate connective tissue including tendon, cartilage, and bone.