Unbranched part of Amylose is helically twisted with __ glucose units at each turn

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Q. Assertion :Starch is a polymer of glucose. Reason: Starch is a reserve food of plants and has two components (i) amylose- a branched polymer of glucose (ii) amylopectin- an unbranched polymer of glucose.

Q. The glycosidic linkage involved in linking the glucose units in amylose part of starch is:

Q. Which of the following statement(s) is/are incorrect?
I. Cellulose is a polysaccharide composed of a large number of

β

-D-glucose units.
II.

β

-D-glucose units in cellulose are joined by

β

-glycosidic linkages.
III. Starch is a mixture of amylose and amylopectin.
IV. Amylose is a branched chain polysaccharide.
V. Amylopectin is a linear polysaccharide.

Q. Which of the following statements is/are incorrect?

I. Amylose does not give blue colour with

I_{2}

solution.

II. Amylopectin gives blue colour with

I_{2}

solution.

III. Amylum is present in wheat, maize, rice, potatoes, barley, sorghum etc.

IV. Amylose is linear polymer of D-glucose units.

Glycogen is a branched chain polymer of $α - D$ glucose units in which chain is formed by C1-C4 glycosidic linkage whereas branching occurs by the formation of C1-C6 glycosidic linkage. Structure of glycogen is similar to .............. .
(a) amylose (b) amylopectin (c) cellulose (d) glucose

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