Half Yearly Model Question Paper 1

11th Standard

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Biology

Use blue ink pen only. Do not write anything on question paper.

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

    Part A

    Choose the correct answer.

    16 x 1 = 16
  1. The correct statement regarding Blue green algae is

    (a)

    lack of motile structures

    (b)

    presence of cellulose in cell wall

    (c)

    absence of mucilage around the thallus

    (d)

    presence of floridean starch

  2. Read the following statements. ( A to E ) and select the option with all correct statements.
    A) Mosses and Lichens are the first organisms to colonise a bare rock.
    B) Selaginella is a homosporous pteridophyte.
    C) Coralloid roots in Cycas have VAM.
    D) Main plant body in bryophytes is gametophytic, whereas in pteridophytes it is sporophytic.
    E) In gymnosperms, male and female gametophytes are present within sporangia located on sporophyte.

    (a)

    B, C and E

    (b)

    A, C and D

    (c)

    B, C and D

    (d)

    A, D and E

  3. Bryophyllum and Dioscorea are example for

    (a)

    Foliar bud, apical bud

    (b)

    Foliar bud, cauline bud

    (c)

    Cauline bud, apical bud

    (d)

    Cauline bud, foliar bud

  4. Aggregate fruit develops from

    (a)

    Multicarpellary, apocarpous ovary

    (b)

    Multicarpellary, syncarpous ovary

    (c)

    Multicarpellary ovary

    (d)

    Whole inflorescence

  5. The taxonomy which involves the similarities and dissimilarities among the immune system of different taxa is termed as

    (a)

    Chemotaxonomy

    (b)

    Molecular systematics

    (c)

    Serotaxonomy

    (d)

    Numerical taxonomy

  6. Match the columns and identify the correct option:

      Column I   Column II
    A Thylakoids 1. Disc-shaped sacs in Golgi apparatus
    B. Cristae 2. Condensed structure of DNA
    C. Cisternae 3. Flat membranous sacs in stroma
    D Chromatin 4. Infoldings in mitochondria
    (a)
    A B C D
    3 4 2 1
    (b)
    A B C D
    4 3 1 2
    (c)
    A B C D
    3 4 1 2
    (d)
    A B C D
    3 1 4 2
  7. What do A and B indicate in the given diagram.

    (a)

    Nucleolus, Nuclear membrance

    (b)

    Nucleolus, Chromatin

    (c)

    Nucleolus, Nucleoplasm

    (d)

    Chromosome, Nuclear membrane

  8. Synapsis occur between

    (a)

    mRNA and ribosomes

    (b)

    spindle fibres and centromeres

    (c)

    two homologous Chromosomes

    (d)

    a male and a female gamete

  9. 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

  10. The sphincter of Oddi guards

    (a)

    Hepatopancreatic duct

    (b)

    Common bile duct

    (c)

    Pancreatic duct

    (d)

    Cystic duct

  11. The respiratory structures of insects are

    (a)

    tracheal tubes

    (b)

    gills

    (c)

    green glands

    (d)

    lungs

  12. A patient's chart reveals that he has a cardiac output of 7500mL per minute and a stroke volume of 50 mL. What is his pulse rate (in beats/min)?

    (a)

    50

    (b)

    100

    (c)

    150

    (d)

    400

  13. A person who is on a long hunger strike and is , surviving only on water, will have

    (a)

    Less amino acids in his urine

    (b)

    Macula densa cells

    (c)

    Less urea in his urine

    (d)

    More sodium in his urine

  14. Muscles are formed by

    (a)

    myocytes

    (b)

    leucocytes

    (c)

    osteocytes

    (d)

    lymphocytes

  15. During synaptic transmission of nerve impulse, the neurotransmitter (P) is released from synaptic vesicles by the action of ions (Q). Choose the correct P and Q.

    (a)

    P = Acetylcholine, Q = Ca++

    (b)

    P = Acetylcholine, Q =Na+

    (c)

    P = GABA, Q = Na+

    (d)

    P = Cholinesterase, Q = Ca++

  16. Which of the following are exclusive endocrine glands?

    (a)

    Thymus and Testis

    (b)

    Adrenal and Ovary

    (c)

    Parathyroid and Adrenal

    (d)

    Pancreas and Parathyroid

  17. Part B

    Answer all the questions. Each question carries two marks.

    8 x 2 = 16
  18. Write the distinguishing features of Monera.

  19. Compare sympodial branching with monopodial branching.

  20. State the protoplasm theory.

  21. Given below is the diagrammatic representation of one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown & one blank component" X" in it.

    CATEGORY COMPOUND
    Cholesterol Guanine
    Amino acid NH2
    Nucleotide Adenine
    Nucleoside Uracil
  22. Identify the structure that the archenteron becomes in a developing animal.

  23. Why do you call cockroach a pest?

  24. Write the role of oestrogen in ovulation.

  25. A tree is believed to be releasing oxygen during night time. Do you believe the truthfulness of this statement? Justify your answer by giving reasons?

  26. Part C

    Answer all the questions. Each question carries three marks.

    6 x 3 = 18
  27. Give an outline of Bryophytes.

  28. Distinguish between prokaryotes and eukaryotes.

  29. Why is Limulus called living fossil?

  30. Give the location of clitellum and spermathecal openings in Lampito mauritii.

  31. Growth hormone is important for normal growth. Justify the statement.

  32. Why is that in certain plants deficiency symptoms appear first in younger parts of the plants while in others, they do so in mature organs?

  33. Part D


    Answer all the questions. Each question carries five marks.

    4 x 5 = 20
  34. Describe the method of preparation of herbarium specimen

  35. What are the factors affecting the rate of enzyme reaction?

  36. What are the components of blood in frog?

  37. Explain the process of digestion in the stomach

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