Biotechnology - Plant Structure - Discussion

Discussion :: Plant Structure - Section 1 (Q.No.5)


If the ends of the following polysaccharide are pulled, which one would stretch the most?

[A]. Glycogen
[B]. Starch
[C]. Cellulose
[D]. None of these

Answer: Option B


No answer description available for this question.

Saaral said: (Nov 8, 2014)  
Why does Starch stretch?

Prakriti said: (May 19, 2017)  
Although both starch and cellulose are polymeric forms of glucose, they differ in their chemical and physical properties due to the linkage. Cellulose is mostly linear chains of glucose molecules linked together by beta 1, 4 glycosidic bonds whereas starch is found in both linear and branched chains.

The orientation of the glycosidic linkages in cellulose makes the glucose rings to be arranged in a flip flop fashion which contributes to the rigidity. There are no branching chains in cellulose. Cellulose also owes its rigidity to the numerous hydrogen bonds in the structure which in turn makes a good structural polysaccharide. Starch may stretch due to its low rigidity than that of cellulose.

Rishikesh Kumar said: (Aug 17, 2018)  
Cellulose is more stretchable than starch. I think the answer is wrong.

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