NCERT Class 11 Biotechnology Book Chapter 3 Answer English Medium | Biomolecules | NCERT Class 11 Biotechnology Book Chapter 3 Book Questions and Answer Solutions English Medium |

Chapter 3

Biomolecules

Exercises

1. Describe the classification of carbohydrates.

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2. Differentiate between D- and L-forms of glucose.

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3. Draw the structure of a disaccharide made up of two monosaccharides glucose and fructose.

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4. Draw the partial structure of starch and glycogen.

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5. Write the major functions of carbohydrates.

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6. Describe isomerisation in monosaccharides.

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7. Differentiate between sphingolipids and glycerolipids.

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8. Why are membrane lipids called amphipathic?

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9. Differentiate between saturated and unsaturated fatty acids.

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10. Describe the various categories of amino acids.

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11. What is zwitterion and how is it developed?

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12. What are non-standard and non-protein amino acids?

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13. How the peptide bonds are formed?

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14. Draw the structure of Lys-Glu-Lys.

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15. Describe the various secondary structures of protein.

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16. Differentiate between tertiary and quaternary structure of proteins.

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17. Differentiate between nucleosides and nucleotides.

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18. Explain the primary structure of DNA.

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19. Draw the structure of A-T-C-G polynucleotide.

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20. Explain Watson and Crick model of DNA.

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21. Describe the various forms of DNA.

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22. Describe the clover leaf model of tRNA.

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23. In carbohydrates which of these functional groups are present

(a) Alcohol and carboxyl groups

(b) Aldehyde and ketone groups

(c) Hydroxyl and hydrogen groups

(d) Ether and ester groups

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24. Which of the following is a non-reducing disaccharide?

(a) Maltose

(b) Lactose

(c) Sucrose

(d) Cellobiose

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25. The repeating units of proteins are

(a) Glucose units

(b) Amino acids

(c) Fatty acids

(d) Nucleotides

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26. Which of the following is the most common secondary structure of proteins

(a) α-helix

(b) β-pleated sheet

(c) Both (a) and (b)

(d) None of the above

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27. A nucleotide contains

(a) Nitrogenous base, sugar and phosphate

(b) Sugar and phosphate

(c) Nitrogenous base and sugar

(d) None of the above

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28. The two strands in DNA double helix are joined by

(a) Covalent bond

(b) Hydrogen bond

(c) Glycosidic bond

(d) Phosphodiester bond

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29. Which is an example of storage lipid?

(a) Fatty acids

(b) Triacylglycerol

(c) Sphingolipids

(d) Eicosanoids

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30. In glycerolipids fatty acids are joined to glycerol through which bond?

(a) Phosphodiester bond

(b) Glycosidic bond

(c) Peptide bond

(d) Ester bond

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