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Question

The globular shape of a protein is called the


A
primary structure
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B
secondary structure
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C
tertiary structure
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D
quaternary structure
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Solution

The correct option is C i.e tertiary structure
The globular shape of a protein is called the tertiary structure.
This structure results when the chains of polypeptides coil around
to give a spherical shape. These are usually soluble in water. Insulin and albumins are common examples of globular proteins.
The tertiary structure of proteins: The tertiary
structure of proteins represents the overall folding of the polypeptide chains i.e., further folding of the secondary structure. It gives rise to two major molecular shapes viz. fibrous and globular. The main forces which stabilise the 2° and 3° structures of proteins are hydrogen bonds, disulphide linkages, van der Waals and electrostatic forces of attraction


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