Botany : Biomolecules - Important Question Paper

11th Standard

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Biology

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

    Part A

    Multiple Choice Question

    6 x 1 = 6
  1. The most basic amino acid is

    (a)

    Arginine

    (b)

    Histidine

    (c)

    Glycine

    (d)

    Glutamine

  2. An example of feedback inhibition is

    (a)

    Cyanide action on cytochrome

    (b)

    Sulpha drug on folic acid synthesiser bacteria

    (c)

    Allosteric inhibition of hexokinase by glucose - 6 - phosphate

    (d)

    The inhibition of succinic dehydrogenase by malonate

  3. Enzymes that catalyse interconversion of optical, geometrical or positional isomers are

    (a)

    Ligases

    (b)

    Lyases

    (c)

    Hydrolases

    (d)

    Isomerases

  4. 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

  5. Membrane lipids are ____________.

    (a)

    Phospholipids

    (b)

    Steroids

    (c)

    Waxes

    (d)

    Wax

  6. Insulin is a polymer of____________________________  

    (a)

    sucrose

    (b)

    fructose

    (c)

    glucose

    (d)

    maltose

  7. Part B

    Answer all the Two Mark Questions

    8 x 2 = 16
  8. Distinguish between nitrogenous base and a base found in inorganic chemistry.

  9. What is tRNA?

  10. Define monosaccharide.

  11. What is chitin made up of?

  12. Define the term amphoteric.

  13. Explain briefly anabolic reactions.

  14. Define the terms nucleotide and nucleoside?

  15. Mention any two sulphur containing amino acids.

  16. Part C

    Answer all the Three Mark Questions

    6 x 3 = 18
  17. Differentiate Prokaryotic mRNA and Eukaryotic mRNA?

  18. Explain Polysaccharide with an example.

  19. Describe the test for reducing sugars.

  20. Define triglycerides. Explain with examples.

  21. What are Allosteric enzymes? Explain with suitable example.

  22. Explain ribosomal RNA. Add a note on its function.

  23. Part D

    Answer all the Five Mark Questions

    2 x 5 = 10
  24. Explain the structure and functions of different types of RNA.

  25. Explain the different types of protein bonding

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