Biomolecules Important Questions

11th Standard

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Biology

Time : 01:00:00 Hrs
Total Marks : 50

    Part A

    10 x 1 = 10
  1. The most basic amino acid is

    (a)

    Arginine

    (b)

    Histidine

    (c)

    Glycine

    (d)

    Glutamine

  2. Proteins perform many physiological functions. For example some functions as enzymes. One of the following represents an additional function that some proteins discharge:

    (a)

    Antibiotics

    (b)

    Pigment conferring colour to skin

    (c)

    Pigments making colours of flowers

    (d)

    Hormones

  3. Sanger first sequenced the protein called ____________.

    (a)

    Inulin

    (b)

    Glycine

    (c)

    Insulin

    (d)

    Peptidase

  4. Which one of the following pairs is correctly matched?

    (a)

    Fats \(\rightarrow\) Long saturated Fatty acids chain.

    (b)

    Derivatives of Lipid \(\rightarrow\) Vitamins A, D, E.

    (c)

    Deoxyribose \(\rightarrow\) RNA.

    (d)

    Glycogen \(\rightarrow\) Forms the plant cell wall

  5. Which of the following is not a disaccharide?

    (a)

    Maltose

    (b)

    Starch

    (c)

    Sucrose

    (d)

    Lactose

  6. The structure of protein can be destroyed by which rays?

    (a)

    Ultra violet rays

    (b)

    Infra red rays

    (c)

    Radio waves

    (d)

    Micro waves

  7. Which biomolecule fights against infectious organisms?

    (a)

    Lipid

    (b)

    Nucleic acid

    (c)

    Protein

    (d)

    Enzyme

  8. What is Guanine?

    (a)

    Purine

    (b)

    Hormone

    (c)

    Enzyme

    (d)

    Pyrimidine

  9. The diameter of DNA molecules of DNA is:

    (a)

    34 \(\mathring { A } \)

    (b)

    20 \(\mathring { A } \)

    (c)

    3.4 \(\mathring { A } \)

    (d)

    10 \(\mathring { A } \)

  10. The common instant source of energy for cellular activities is

    (a)

    Mitochondria

    (b)

    DNA

    (c)

    RNA

    (d)

    ATP

  11. Part B

    5 x 2 = 10
  12. Distinguish between nitrogenous base and a base found in inorganic chemistry.

  13. What is a prosthetic group?

  14. What are steroids? Explain with an example.

  15. What is Starch?

  16. Why oil does not get mixed if added with water?

  17. Part C

    5 x 3 = 15
  18. Write a short note on Chitin.

  19. Give examples of secondary metabolites in plants

  20. Draw the structure of Purine & Pyrimidine.

  21. How will you identify the presence of protein in food samples?

  22. Which was the first alkaloid discovered? Mentions its uses.

  23. Part D

    3 x 5 = 15
  24. Briefly outline the classification of enzymes.

  25. Explain any two factors affecting the rate of enzyme reaction, with the help of graphical representation.

  26. Compare DNA with RNA.

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