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  4. The helical structure of protein is stabilized by

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Q. The helical structure of protein is stabilized by

ManipalManipal 2007Biomolecules

Solution:

The helical structure of protein is stabilized by hydrogen bonds between amide group of the same peptide chain. These bonds are formed by $-NH- $ group of one unit and oxygen of carbonyl group of the third unit. This $ H- $ bonding is responsible for holding helix in a position.