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Public Exam Model Question Paper 2019 - 2020

11th Standard

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Biology

Time : 02:45:00 Hrs
Total Marks : 70

    Part I

    Answer all the questions.

    Choose the most suitable answer from the given four alternatives and write the option code with the corresponding answer.

    15 x 1 = 15
  1. Father of Indian Mycology ________.

    (a)

    P.A.Micheli

    (b)

    C.H.Blackley

    (c)

    EJ.Butler

    (d)

    A.F. Blakeseley

  2. Plants that grows completely under water are called as ____________type of aquatic plants.

    (a)

    emergent

    (b)

    free floating

    (c)

    submerged

    (d)

    mangroves

  3. What is the leaf of Zorniadiphyliain Fabaceae?

    (a)

    Bifoliate

    (b)

    Trifoliate

    (c)

    Raceme

    (d)

    Panicle

  4. Keeping in view the fluid mosaic model for the structure of cell membrane, which one of the following statements is correct with respect to the movement of lipid and proteins from one lipid monolayer to the other

    (a)

    Neither lipid nor proteins can flip-flop

    (b)

    Both lipid and proteins can flip flop

    (c)

    While lipids can rarely flip-flop proteins cannot

    (d)

    While proteins can flip-flop lipids cannot

  5. Which taxonomic aid gives comprehensive information about a taxon?

    (a)

    Taxonomic Key

    (b)

    Herbarium

    (c)

    Flora

    (d)

    Monograph

  6. In protandrous condition, what is correct?

    (a)

    ova mature earlier than sperms

    (b)

    sperms mature earlier than ova

    (c)

    both sperms and ova mature at the same time

    (d)

    both sperms and ova do not mature at all

  7. In the small intestine, active absorption occurs in case of

    (a)

    Glucose

    (b)

    Amino acids

    (c)

    Na+

    (d)

    All the above

  8. Fibrinogen is concerned with __________.

    (a)

    transport of ions

    (b)

    transport of lipids

    (c)

    transport of hormones

    (d)

    coagulation of blood

  9. Which of the following statement concerning the somatic division of the peripheral neural system is incorrect?

    (a)

    Its pathways innervate skeletal muscles

    (b)

    Its pathways are usually voluntary

    (c)

    Some of its pathways are referred to as reflex arcs

    (d)

    Its pathways always involve four neurons

  10. When a leaf trace extends from a vascular bundle in a dicot stem, what would be the arrangement of vascular tissues in the veins of the leaf?

    (a)

    Xylem would be on top and the phloem on the bottom

    (b)

    Phloem would be on top and the xylem on the bottom

    (c)

    Xylem would encircle the phloem

    (d)

    Phloem would encircle the xylem

  11. __________ is a free living Nitrogen fixing fungi.

    (a)

    Anabaena

    (b)

    Pullularia

    (c)

    Chlorobium

    (d)

    Mucor

  12. Which chlorophyll molecule does not have a phytol tail?

    (a)

    Chl- a

    (b)

    Chl-b

    (c)

    Chl- c

    (d)

    Chl -d

  13. Glycolysis was worked out in_____________.

    (a)

    Castor

    (b)

    Bacteria

    (c)

    Neurospora

    (d)

    Yeast

  14. Level of .......... increases during drought.

    (a)

    Auxin

    (b)

    Ethylene

    (c)

    ABA

    (d)

    Cytokinin

  15. How many times the blood is diluted for RBC cell counting under 45 X objective of the microscope?

    (a)

    1 : 10 times

    (b)

    1 : 20 times

    (c)

    1 : 200 times

    (d)

    1 : 100 times

  16. Part II

    Answer any 6 questions. Question no. 24 is compulsory.

    6 x 2 = 12
  17. Write the distinguishing features of Monera.

  18. What you know about Helicoid inflorescence in monochasial cyme.

  19. Compare the Gynoecium of Pisum sativum and Datura metal.

  20. Which is the longest phase of cell cycle? What happens during that phase?

  21. Differentiate between probiotics and pathogenic bacteria

  22. Write down any two functions of melatonin.

  23. Comment on homeostasis.

  24. Mention the uses of honey

  25. Why the cells of sclerenchyma and tracheids become dead?

  26. Part III

    Answer any 6 questions. Question no. 33 is compulsory.

    6 x 3 = 18
  27. Do you think shape of chloroplast is unique for algae? Justify your answer.

  28. Explain the role of hemicellulose, pectin & glycoprotein in primary cell wall.

  29. Write a note on the economic importance of frog.

  30. What might be the effect on a person whose diet has less iron content?

  31. A timber merchant bought 2 logs of wood from a forest & named them A & B, The log A was 50 year old & B was 20 years old. Which log of wood will last longer for the merchant? Why?

  32. Explain the application of exosmosis in food preservation.

  33. Grasses have an adaptive mechanism to compensate photorespiratory losses- Name and describe the mechanism.

  34. What are the industrial uses of alcoholic fermentation?

  35. What is plasticity?

  36. Part IV

    Answer all the questions.

    5 x 5 = 25
    1. Explain the structure of kidney.

    2. Explain the physiological effects of ABA.

    1. Write the characteristic features of DNA.

    2. Explain about the different respira ory volumes and capacities ot lungs.

    1. Could the number of eggs or young ones produced by an oviparous and viviparous female be equal? Why?

    2. Write about the different types of compound epithelium.

    1. Explain The Dry Fruit.

    2. Comparison of microscopes

    1. Draw and label the ultra structure of a bacterium.

    2. Write the similarities and differences between
      (i) Avicennia and Trapa.
      (ii) Banyan and Silk cotton.
      (iii) Fusiform and Napiform root.

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