Macromolecule chitin is                                                   [2013]

Cellulose, the most important constituent of plant cell wall is made of                     [1998]

1. Unbranched chain of glucose molecules linked by $\mathrm{\alpha }$ 1, 4-glycosidic bond

2. Branched chain of glucose molecules linked by $\mathrm{\beta }$ 1, 4-glycosidic bond in straight chain and $\mathrm{\alpha }$, 1, 6-glycosidic bond at the site of branching

3. Unbranched chain of glucose molecules linked by $\mathrm{\beta }$ 1, 4-glycosidic bond

4. Branched chain of glucose molecules linked by $\mathrm{\alpha }$ 1, 6-glycosidic bond at the site of branching

In which of the following groups, all the three are examples of polysaccharides?           

1. Starch, glycogen, cellulose

2. Sucrose, maltose, glucose

3. Glucose, fructose, lactose

4. Galactose, starch, sucrose 

The chitinous exoskeleton of arthopods is formed by the polymerisation of 

(1) keratin sulphate and chondroitin sulphate

(2) D-glucosamine

(3) N-acetyl glucosamine

(4) lipoglycans

Cotton fibres mainly contains

Which of the following is a homopolysaccharide?

Cellulose is present in

1.  cotton fibres

2. Paper

3. Cell wall of plants

4. All of these

The chitinous exoskeleton of arthropods is formed by the polymerisation of–
1. D- glucosamine
2. N- acetyl glucosamine
3. Lipoglycans
4. Keratin sulphate and chondroitin sulphate

All the following statements about cellulose are correct, except