In case of oligosaccharides, the monosaccharide units are joined by:

glycoside bonds

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peptide bonds

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dative bonds

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covalent bonds

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Solution

The correct option is A glycoside bonds
An oligosaccharide is a saccharide polymer containing a small number (typically three to nine) of simple sugars (monosaccharides).
They were linked together mostly by O-glycosidic bond through condensation reaction between an anomeric carbon of a monosaccharide and the other. They can also form N-glycosidic linkages under certain atmosphere.

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\begin{matrix} List I & List II (A) Sucrose & (i) β - D-glucose C_{1} - C_{4} glycosidic linkage (B) Lactose & (i i) α - D-glucose, β - D-fructose C_{1} - C_{2} glycosidic linkage (C) Cellulose & (i i i) β - D-glucose, β - D-galactose C_{1} - C_{4} glycosidic linkage \end{matrix}

List-I contains saccharides and List-II contains the monosaccharide units as well as glycosidic bonds.
Choose the correct option considering List-I and List-II.

Boric acid has a layer structure in which planar BO₃ units are joined by:

Q. In which of the following compound, all the monosaccharide units are not joined by

C_{1} - O - C_{4}

chain?

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