Biomolecules - Result Question 20

####20. Sucrose in water is dextro-rotatory, [α]D=+66.4. When boiled with dilute HCl, the solution becomes leavo-rotatory, [α]D=20. In this process, the sucrose molecule breaks into[1996]

(a) L-glucose + D-fructose

(b) L-glucose + L-fructose

(c) D-glucose + D-fructose

(d) D-glucose +L-fructose

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Solution:

  1. (c) The hydrolysis of sucrose by boiling with mineral acid or by enzyme invertase or sucrase produces a mixture of equal molecules of D(+) glucose and D(-) Fructose.



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