Q33 / 150 · MHT CET 2023 (09 May Shift 2) · Chemistry

Identify the carbon atoms of $\alpha$-glucose and $\beta$-fructose forming glycosidic linkage in sucrose.

  • A
    $\mathrm{C}$ - 1 of $\beta$-fructose and $\mathrm{C}$ - 2 of $\alpha$-glucose
  • Correct answer
    B
    $\mathrm{C}-1$ of $\alpha$-glucose and $\mathrm{C}-2$ of $\beta$-fructose
  • C
    $\mathrm{C}-1$ of $\alpha$-glucose and $\mathrm{C}-1$ of $\beta$-fructose
  • D
    $\mathrm{C}-2$ of $\alpha$-glucose and $\mathrm{C}-2$ of $\beta$-fructose

Solution

Structure of sucrose contains glycosidic linkage between - $\mathrm{C}-1$ of $\alpha$-glucose and $\mathrm{C}-2$ of $\beta$-fructose. Aldehyde and ketone groups of both the monosaccharide units are involved in formation of the glycosidic bond.

Hence, the correct answer is option: 'B'.

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