11th Half Yearly Model Question

11th Standard

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Biology

Time : 02:30:00 Hrs
Total Marks : 70

    I.Choose the suitable best answer:

    16 x 1 = 16
  1. Food poisoning is caused by ______________

    (a)

    Yersinia

    (b)

    Clostridium

    (c)

    Treponema

    (d)

    Vibrio

  2. Example for negatively geotropic roots

    (a)

    Ipomoea, Dahlia

    (b)

    Asparagus, Ruellia

    (c)

    Vitis, Portulaca

    (d)

    Avicennia, Rhizophora

  3. Tubular corolla with a single strap-shaped limb ________________.

    (a)

    Personate

    (b)

    Ligulate

    (c)

    Apotepalous

    (d)

    Syntepalous

  4. __________________ribosomes are present in the outer surface of the endoplasmic reticulum.

    (a)

    Cisternae

    (b)

    Vesicles

    (c)

    Tubules

    (d)

    Rough Endoplasmic Reticulum

  5. A living organism is differentiated from non- living structure based on

    (a)

    Reproduction

    (b)

    Growth

    (c)

    Metabolism

    (d)

    Movement

  6. Which of the following has exoskeleton of scales and paired copulatory organ or penis?

    (a)

    Sharks

    (b)

    Lizards

    (c)

    Urodela

    (d)

    Urochordata

  7. To sustain themselves, earthworms must guide their way through the soil using their powerful muscles. They gather nutrients by ingesting organic matter and soil, absorbing what they need into their bodies.
    True or False: The two ends of the earthworm can equally ingest soil.

    (a)

    True

    (b)

    False

  8. CO2 is transported through blood to lungs as

    (a)

    carbonic acid

    (b)

    oxyhaemoglobin

    (c)

    carbamino haemoglobin

    (d)

    carboxy haemoglobin

  9. Aldosterone acts at the distal convoluted tubule and collecting duct resulting in the absorption of water through

    (a)

    Aquaporins

    (b)

    Spectrins

    (c)

    GLUT

    (d)

    Chloride channels

  10. The cerebrum is divided into ________ lobes.

    (a)

    6

    (b)

    7

    (c)

    8

    (d)

    4

  11. Which of the given option shows all wrong statements for thyroid gland.
    (i) It inhibits process of RBC formation
    (ii) It helps in maintenance of water and electrolytes
    (iii) Its more secretion can reduce blood pressure
    (iv) It Stimulates osteoblast

    (a)

    (i) and (ii)

    (b)

    (iii) and (iv)

    (c)

    (i) and (iv)

    (d)

    (i) and (iii)

  12. Say True or False.
    Worker bee prepares bee-bread to feed the larvae

    (a)

    True

    (b)

    false

  13. Read the following sentences and identify the correctly matched sentences.
    i. In exarch condition, the protoxylem lies outside of metaxylem.
    ii. In endarch condition, the protoxylem lie towords the centre.
    iii. In centarch condition, metaxylem lies in the middle of the protoxylem.
    iv. In mesarch condition, protoxylem lies in the middle of the metaxylem.

    (a)

    i, ii and iii only

    (b)

    ii, iii and iv only

    (c)

    i, ii and iv only

    (d)

    All of these

  14. Which among the following are common to facilitated diffusion and active transport?

    (a)

    depend on respiratory energy

    (b)

    transport along concentration gradient

    (c)

    involvement of carrier proteins

    (d)

    all the above

  15. Energy needed for ATP synthesis in PS II comes from____________.

    (a)

    Proton gradient

    (b)

    Electron gradient

    (c)

    Reduction of glucose

    (d)

    Oxidation of glucose

  16. Select the correctly matched one

    A) Human urine i) Auxin –B
    B) Corn gram oil ii) GA3
    C) Fungus iii) Abscisic acid II
    D) Herring fish sperm iv) Kinitin
    E) Unripe maize grains v) Auxin A
    F) Young cotton bolls vi) Zeatin
    (a)
    A B C D E F
    iii iv v vi i ii
    (b)
    A B C D E F
    v i ii iv vi iii
    (c)
    A B C D E F
    iii v vi i ii iv
    (d)
    A B C D E F
    ii iii v vi iv i
  17. II. Answer any four in both (Bio-Zoo and Bio-Bot)

    8 x 2 = 16
  18. Do you agree with the statement 'Bryophytes I need water for fertilization'? Justify your answer.

  19. Distinguish between apocarpous and syncarpous ovary.

  20. Name any two unique structures/organelles of a plant cell.

  21. Differentiate protostomia and Deuterostomla.

  22. How does the male frog attract the female for mating?

  23. If too much of protein consumed more than the normal need, what will happen to the excess of protein consumed?

  24. What evolutionary hypothesis could explain the heart's role in secreting a hormone that regulates renal function? What hormone is this?

  25. Name the contractile proteins present in the skeletal muscle

  26. Name the following.
    1. The largest bee in the colony.
    2. The kind of flight which the new virgin queen takes along with the drones out of the hive.

  27. What is "bundle cap" or "hard bast"?

  28. Write the role of nitrogenase enzyme in nitrogen fixation? 

  29. What is etiolation?

  30. III. Answer any Three in both (Bio-Zoo and Bio-Bot) Q.No 32,37 is compulsory

    6 x 3 = 18
  31. Write the characteristics of phycomycetes in fungus.

  32. Explain the different types of placentation with example.

  33. Why do some people have curly hair?

  34. Head of cockroach is called hypognathous. Why?

  35. What is colitis?

  36. If the afferent arteriole of the nephron constricts, what happens to the GFR in that nephron? If the efferent arteriole constricts what happens to the GFR in that nephron? Assume that no auto regulation takes place.

  37. What is the significance of melanin?

  38. What are the Nutritive values of fishes?

  39. A cross section of tree trunk contains 60 lighter and 60 darker rings. Determine the age of the tree and justify.

  40. What are phytochromes?

  41. IV. Answer all in details :

    4 x 5 = 20
    1. Draw the structure of different types of viruses and explain.

    2. Write down the economic importance of Family Fabaceae.

    1. Draw a neat labelled diagram of the digestive system of frog

    2. Explain the structure of human heart.

    1. Identify the following structures and explain their significance in renal physiology?
      (a) Juxtaglomerular apparatus
      (b) Podocytes
      (c) Sphincters in the bladder
      (d) Renal cortex

    2. Name the layers of adrenal cortex and mention their secretions.

    1. Explain Chemiosmotic theory.

    2. Write the physiological effects of Cytokinins.

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