Biomolecules

Short Answer Type

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What is the basic structural difference between starch and cellulose?

Cellulose is a straight chain polysaccharide composed only of β-D-glucose units which are joined by glycosidic linkage between C1 of one glucose unit and C4 of the next glucose unit. On other hand starch is a branched chain polymer of α-glucose and consists of two components Amylose(water soluble) and Amylopectin (water insoluble).
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    One Word Answers

    Name a polysaccharide which is stored in the liver of animals as food reserve.

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    Short Answer Type

    In what ways does starch show similarity with cellulose?

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    Long Answer Type

    Enumerate the reactions of D-glucose which cannot be explained by its open chain structure.
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    Multiple Choice Questions

    Consider a double helix. Are the base pairs?

    • part of the backbone structure

    • inside the helix

    • outside the helix

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    Short Answer Type

    What happens when D-glucose is treated with the following reagents?
    Bromine water

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    What do the following abbreviations represent?
    (a) ala,       (b) val,     (c) leu,    (d) gly.  
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    What happens when D-glucose is treated with the following reagents?
    Hi.

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    What is glycogen? How is it different from starch?
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    What happens when D-glucose is treated with the following reagents?
    HNO3.

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