Which of the following have coiled helical structure?
A
Proteins
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B
Liquids
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C
Carbohydrates
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D
Vitamins
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Solution
The correct option is A Proteins The alpha helix (α-helix) is a common motif in the secondary structure of proteins and is a righthand-spiral conformation (i.e. helix) in which every backbone N−H group donates a hydrogen bond to the backbone C=O group of the amino acid located three or four residues earlier along the protein sequence. Protein have coiled helical structure.