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What is meant by primary and secondary s...

What is meant by primary and secondary structure of proteins.

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The specific sequence in which the various a-amino acids present in a protein are linked to one another is called its primary structure and the conformation which the polypeptide chains assume as a result of hydrogen bonding is called the secondary structure of the proteins. The two types of possible secondary structure are `alpha`-helix and `beta`-pleated sheet structure.
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ICSE-BIOMOLECULES-EXERCISE (PART-II)(DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
  1. Name the four bases present in RNA molecule.

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  2. Name a carbohydrate which does not correspond to general formula (Cx(H...

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  3. What is meant by primary and secondary structure of proteins.

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  4. Give reasons for the following: (i) Proteins such as insulin used as...

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  5. Name the vitamin which is vital for the clotting of blood?

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  6. Name two facts in support of zwitterion structure ofa-amino acids.

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  7. Name the vitamins whose deficiency causes (i) Night blindness (ii) Poo...

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  8. What do the following abbreviations stand for : (i) AMP (ii) ADP (i...

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  9. How many molecules of ATP are produced per molecule of glucose in glyc...

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  10. Name thea-amino acid which is optically inactive.

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  11. What are the functions of nucleic acids ? What are the structures of s...

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  12. What is the nature of forces holding two long DNA molecules - together...

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  13. If one strand of DNA has the sequence ATGCTTGA, the sequence in the co...

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  14. Is a diet consisting mainly of rice an adequate diet? Why or why not.

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  15. Differentiate between anomers and epimers.

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  16. Deficiency of which vitamin causes the disease pernicious anaemia ?

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  17. Of the two bases named below, which one is present in RNA and which on...

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  18. Give an example of a disaccharide that contains fructose unit in the f...

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  19. What type of bonding helps in stabilising the a-helix structure of pro...

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  20. What are the products of hydrolysis of sucrose ?

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