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Inorganic and Organic Biomolecules

Which sugar i...

Question

Which sugar is composed only of $β - D - glucose$ units?

A

Starch

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B

Cellulose

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C

Lactose

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D

Sucrose

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Solution

The correct option is B Cellulose
Cellulose is a linear polymer of $D - glucose$ units joined by $β - glycosidic$ linkage between $C_{1}$ of one glucose unit and $C_{4}$ of next glucose unit.

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Similar questions

Q. Which of the following sugar is composed of glucose and fructose unit?

Q. Sucrose is composed of α−α− D-glucose and β−β− D-fructose. These two monosaccharide units are held together by α,β -glycosidic linkage.

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

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

Q. In cellulose,

β

-D-Glucose units are joined by:

Q. Which is a carbohydrate having repeated

β

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