What is the structure of protein?

1.	What is the structure of protein?
Answer» \tPrimary structure\tLinear sequence of amino acids in a polypeptideThis sequence is determined by genes and hereditary material, DNA. Correct sequence is important for proper functioning.\t\t\tSecondary structure\tPrimary structure does not make a protein functionalDue to interactions with immediate neighbors, polypeptides tend to fold into pleats or wrap into coils forming the Secondary structure Polypeptides folding into coils form alpha-helix structurePolypeptides folding into plates form beta-plated structure. This structure is less stable than alpha-helix structure.\t\t\tTertiary structure\tBonds between neighboring amino acids results in further folded structureTertiary structure depends upon the primary structureCreates active sites of enzymatic proteinsSome of the tertiary structures are spherical forming Globular proteins; while some others are like long fibers forming Fibrous proteins\t\t\tQuaternary structure\tMultiple chains of polypeptides held together by hydrogen bondsProteins with multiple chains of polypeptides only have this structure\t\t Get the structure of protein io page no 150 of NCERT book figure no 9.3 and 9.4

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