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What is the basic structural difference ...

What is the basic structural difference between starch and cellulose?

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Starch is not a single compound . It consists of amylose and amylopectin. In contrast , cellulose is a single compound. Amylose is a linear condensation polymer of `alpha`-D-glucose while cellulose is a linear condensation polymer of `beta`-D-glucose. In amylose , C-1 of one glucose unit is connected to `C-4` of the other through `alpha`-glycosidic linkage as shown in Fig.14.8. However , in cellulose `C-1` of one glucose unit is connected to `C-4` of the other through `beta`-glycosidic linkage . Amylopectin , on the other hand , has highly branched structure.
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PRADEEP-BIOMOLECULES -NCERT (EXERCISES)
  1. What is glycogen? How is it different from starch?

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  2. What are the hydrolysis products of (i) sucrose and (ii) lactose?

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  3. What is the basic structural difference between starch and cellulose?

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  4. What happenes when D-glucose is treated with the following reagents? ...

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  5. Enumerate the reactions of D-Glucose which cannot be explained by its ...

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  6. What are essential and non-essential amino acids ? Give two examples o...

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  7. Define the following as related to proteins : (i) Peptide linkage ...

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  8. What are the common types of secondary structures fo proteins?

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  9. What type of bonding helps in stabilising the alpha-helix structure of...

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  10. Differentiate between globular and fibrous proteins.

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  11. How do you explain the amphoteric behaviour of amino acids ?

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  12. What are enzymes ?

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  13. What is the effect of denaturation on the structure of proteins?

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  14. How are vitamins classified? Name the vitamin responsible for the coag...

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  15. Why are vitamin A and vitamin C essential for us? Give their important...

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  16. What are nucleic acids ? Mention their two important functions.

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  17. What is the difference between a nucleoside and a nucleotide?

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  18. The two strands in DNA are not identical but are complementary. Explai...

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  19. Write the important structral and functional differences between DNA a...

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  20. What are the different types of RNA found in the cell?

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