Which type of bond is present in polysaccharides? 

The correct answer is Glycosidic bond

Explanation:

• Polysaccharides are carbohydrates consisting of long chains of monosaccharide units bonded together by glycosidic bonds.
• A glycosidic bond is formed between the hydroxyl groups of two monosaccharides through a dehydration reaction, which releases a molecule of water.
• There are two main types of glycosidic bonds: α (alpha) and β (beta), depending on the orientation of the linking oxygen atom in relation to the carbon atoms in the monosaccharides.
• Example: In maltose, two glucose molecules are linked by an α(1→4) glycosidic bond. In cellulose, glucose molecules are linked by β(1→4) glycosidic bonds, contributing to its structural rigidity

Other Options:

• Sulphonic bond: Sulphonic bonds are associated with sulfonic acids and sulfonates.
• Hydrogen bond: While hydrogen bonds can occur between polysaccharide chains and can contribute to the overall structure and stability (e.g., in cellulose), they are not the primary covalent bonds holding the monosaccharides together within the polysaccharide.
• Phosphodiester bond: Phosphodiester bonds are found in nucleic acids (DNA and RNA) and connect the phosphate group of one nucleotide to the hydroxyl group on the sugar of another nucleotide.