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Biomolecules question

2019 · 8 Apr · Shift 1 · Q3
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Biomolecules question

2019 · 8 Apr · Shift 1 · Q3

JEE MainChemistryBiomoleculesMCQ+4 / −1
Maltose on treatment with dilute HCI gives :
  1. A
    D-Galactose
  2. B
    D-Glucose and D-Fructose
  3. C
    D-Glucose
  4. D
    D-Fructose
View written solutionFree

Correct answer: C

  1. Identify what maltose is

    Maltose is a disaccharide made up of two units of D-glucose joined by an α(1→4)\alpha(1\to 4)α(1→4) glycosidic bond.

    Maltose=D-glucose−D-glucose\text{Maltose} = \text{D-glucose} - \text{D-glucose}Maltose=D-glucose−D-glucose

  2. Effect of dilute HCl

    On treatment with dilute HCl, the glycosidic bond in maltose undergoes hydrolysis.

    Maltose+H2O→dil. HCl2 D-glucose\text{Maltose} + H_2O \xrightarrow[\text{}]{\text{dil. HCl}} 2\,\text{D-glucose}Maltose+H2​Odil. HCl​2D-glucose

  3. Check the options

    • A: D-Galactose — Incorrect. Maltose does not contain galactose.
    • B: D-Glucose and D-Fructose — Incorrect. This is the hydrolysis product of sucrose, not maltose.
    • C: D-Glucose — Correct. Since maltose gives only D-glucose units on hydrolysis.
    • D: D-Fructose — Incorrect. Maltose does not contain fructose.

  4. Conclusion

    Maltose on hydrolysis with dilute HCl gives D-glucose.

    Hence, the correct option is:

    C\boxed{\text{C}}C​

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