Some examples of functional proteins are and structural proteins are .

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Haemoglobin and structural proteins

Structural proteins and haemoglobin

Collagen and keratin

Myoglobin and enzymes

answer is A.

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Detailed Solution

Concept:Some examples of functional proteins are haemoglobin, myoglobin, enzymes and structural proteins are keratin and collagen. Keratin, collagen, and elastin are a few examples of structural proteins. Hair, quills, feathers, horns, and beaks all include keratin. Connective tissues like tendons and ligaments contain collagen and elastin. The most prevalent mammalian protein is known to be collagen. Proteins are structurally divided into four levels: primary, secondary, tertiary, and quaternary. Proteins fold up into certain shapes based on the polymer's amino acid sequence, and the resulting 3D structure is intimately tied to the protein's function. Proteins can work together or with other macromolecules in the body to form intricate assemblies.
Hence, option 1 is the correct answer.

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