Question:

Among the following, the incorrect statement is :

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Recall the linkages: sucrose is \(\alpha\)-1,\(\beta\)-2, amylose is \(\alpha\)-1,4.
Updated On: Nov 11, 2026
  • Maltose and lactose has 1, 4-glycosidic linkage.
  • Sucrose and amylose has 1, 2-glycosidic linkage
  • Cellulose and amylose has 1, 4-glycosidic linkage.
  • Lactose contains \(\beta\)-D-galactose and \(\beta\)-D-glucose.
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The Correct Option is B

Solution and Explanation

Maltose: two \(\alpha\)-D-glucose units joined by an \(\alpha\)-1,4 link; lactose: \(\beta\)-D-galactose and \(\beta\)-D-glucose joined by a \(\beta\)-1,4 link. So (1) and (4) are correct.
Cellulose has \(\beta\)-1,4 links and amylose has \(\alpha\)-1,4 links, so (3) is correct.
Sucrose has a 1,2 link (\(\alpha\)-glucose C1 to \(\beta\)-fructose C2), but amylose has 1,4 links, not 1,2. Therefore statement (2) is incorrect.
Answer: (2) Sucrose and amylose has 1, 2-glycosidic linkage
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