The β-pleated sheet structure of proteins is due to
A
Formation of peptide bonds
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B
Linking together of two or more polypeptide chains
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C
Folding of the coiled polypeptide chains
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D
None of the above
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Solution
The correct option is C Linking together of two or more polypeptide chains
Proteins are made up of amino acid that is bonded together by the peptide bonds.
The primary structure of a protein is the covalent connection of proteins It is a linear sequence of amino acid bound together with peptide bonds. Only in the secondary structure, there is a complex folding of the linear polypeptide chain into a specific structure which is the Alpha helical structure. When it is a repeated and they form a pleated sheet-like structure. This forms the beta pleated sheet. This has hydrogen bonds in addition to the peptide bonds that provide stability to the protein and this is the secondary structure of the protein.
So, the correct option is 'Linking together of two or more polypeptide chains'