Q7 / 90 · JEE Main 2018 (16 Apr Online) · Chemistry

Among the following, the incorrect statement is

  • A
    cellulose and amylose has 1,4-glycosidic linkage.
  • B
    lactose contains β-D-galactose and β-D-glucose.
  • C
    maltose and lactose has 1,4-glycosidic linkage.
  • Correct answer
    D
    sucrose and amylose has 1,2-glycosidic linkage.

Solution

In amylose, 1,4-glycosidic linkage is present.
Figure
So, this option statement is incorrect.

Sucrose has 1,2-glycosidic linkage between glucose and fructose. 

cellulose and amylose has 1,4-glycosidic linkage. lactose contains β-D-galactose and β-D-glucose. maltose and lactose has 1,4-glycosidic linkage.

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

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