A) pectin
B) myrosin enzyme
C) latex
D) alkaloids
Correct Answer: B
Solution :
In the members of family-Cruciferae, secretory cells are found, which contain myrosin enzyme. The characteristic smell of these plants is due to presence of sulphur containing glucosides, which hydrolyses them into glucose and isothiocynates. Latex is characteristic feature of family- Papaveraceae, eg, poppy. Pectin are mucopolysaccharides that occur in plant cell walls. Alkaloids are nitrogenous substances, eg, quinine from bark of Cinchona, reserpine from roots of Rauwolffia serpentina, atropine from Atropa belladona.
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