Question:
Write short notes on the following:
(i) Secondary structure of proteins
(ii) Peptide bond
(iii) Monosaccharides
Write short notes on the following:
(i) Secondary structure of proteins
(ii) Peptide bond
(iii) Monosaccharides
(ii) Peptide bond
(iii) Monosaccharides
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Proteins → peptides → amino acids; Carbohydrates → monosaccharides are the basic units.
Updated On: Oct 7, 2025
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Solution and Explanation
(i) Secondary structure of proteins.
Formed by hydrogen bonding between peptide chains. Two main types: \(\alpha\)-helix (spiral) and \(\beta\)-pleated sheet (zig-zag). Gives stability and shape to proteins.
(ii) Peptide bond.
A covalent linkage \(-CO-NH-\) formed between carboxyl group of one amino acid and amino group of another. Responsible for formation of polypeptides and proteins.
(iii) Monosaccharides.
Simplest carbohydrates (C\(_n\)H\(_{2n}\)O\(_n\)). Cannot be hydrolysed further. Examples: glucose, fructose, galactose. They are reducing sugars.
Formed by hydrogen bonding between peptide chains. Two main types: \(\alpha\)-helix (spiral) and \(\beta\)-pleated sheet (zig-zag). Gives stability and shape to proteins.
(ii) Peptide bond.
A covalent linkage \(-CO-NH-\) formed between carboxyl group of one amino acid and amino group of another. Responsible for formation of polypeptides and proteins.
(iii) Monosaccharides.
Simplest carbohydrates (C\(_n\)H\(_{2n}\)O\(_n\)). Cannot be hydrolysed further. Examples: glucose, fructose, galactose. They are reducing sugars.
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