Model paper

11th Standard

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Biology

Answer all the questions 
Time : 01:00:00 Hrs
Total Marks : 94

    Answer all the questions 

    10 x 1 = 10
  1. Which one of the following statement about virus is correct?

    (a)

    Possess their own metabolic system

    (b)

    They are facultative parasites

    (c)

    They contain DNA or RNA

    (d)

    Enzymes are present

  2. Identify the incorrect statement about the Gram positive bacteria

    (a)

    Techoic acid absent

    (b)

    High percentage of peptidoglycan is found in cell wall

    (c)

    Cell wall is single layered

    (d)

    Lipopolysaccharide is present in cell wall

  3. Identify the Archaebacterium

    (a)

    Acetobacter

    (b)

    Erwinia

    (c)

    Treponema

    (d)

    Methanobacterium

  4. The respiratory pigment in cockroach is

    (a)

    Haemoglobin

    (b)

    Haemocyanin

    (c)

    Oxyhaemoglobin

    (d)

    Haemoerythrin

  5. Exoskeleton of which phylum consists of chitinous cuticle?

    (a)

    Annelida

    (b)

    Porifera

    (c)

    Arthropoda

    (d)

    Echinodermata

  6. Classification of sponges is primarily based on the

    (a)

    body organization

    (b)

    body plan

    (c)

    skeleton

    (d)

    canal system

  7. Cavity of coelenterates is called

    (a)

    coelenteron

    (b)

    coelom

    (c)

    cavity

    (d)

    none of these

  8. Mollusca is

    (a)

    Triploblastic, acoelomate

    (b)

    Triploblastic, coelomate

    (c)

    Diploblastic, acoelomate

    (d)

    Diploblastic, coelomate

  9. Peripatus is known as a connecting link, because it has the characters of both

    (a)

    Fishes & amphibians

    (b)

    Reptiles & birds

    (c)

    Aves & fishes

    (d)

    Arthropoda & annelids

  10. Osphradium of Pila globosa is

    (a)

    thermoreceptor

    (b)

    Pheretima

    (c)

    chemoreceptor

    (d)

    tangoreceptor

  11. Answer all the questions 

    10 x 2 = 20
  12. New phages are not formed in lysogenic cycle. Explain.

  13. Are viruses useful to us? Justify.

  14. Is bacterial photosynthesis similar to photosynthesis in higher plants? Reason out.

  15. Why reproduction is necessary? Is it essential for survival? If a living organism does not reproduce, to which category will it belong, living or nonliving?

  16. Why virus cannot grow on non-living culture medium.

  17. Why reproduction cannot be the defining characteristic of living organisms?

  18. List the features that all vertebrates show at some point in their development.

  19. Compare closed and open circulatory system.

  20. Identify the structure that the archenteron becomes in a developing animal.

  21. Why blood is considered as a typical connective tissue?

  22. Answer all the questions 

    18 x 3 = 54
  23. Distinguish Prokaryotic and Eukaryotic organisms.

  24. What are the three main symmetry of viruses?

  25. What is Fimbriae or Pili?

  26. Identify the diagram and label any 2 parts.

  27. Enumerate about Growth.

  28. Describe the step of Adsorption in lytic cycle of phages.

  29. Write the importance of Need of Classification.

  30. Write the characteristics of Bacterial chromosome.

  31. Define Aerobic respiration of bacteria.

  32. Distinguish between Prokaryotes and Eukaryotes.

  33. Match the following.

    Column I Column II
    (P) Euplectella i) Sea anemone
    (Q) Adamsia ii) Filarial worm
    (R) Wuchereria iii) Venus flower basket
    (S) Antedom iv) Sea-Lily

    (a) (P-iii) (Q-i) (R-ii) (S-iv)
    (b) (P-iv) (Q-ii) (R-iii) (S-i)
    (c) (P-i) (Q-ii) (R-iv) (S-iii)
    (d) (P-ii) (Q-i) (R-iv) (S-iii)

  34. Name the excretory organs found in different animals (any four with examples).

  35. Write the general characters of the phylum cnidaria.

  36. What is meant by 'living fabrics'?

  37. 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?

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

  39. Respiratory quotient is zero in succulent plants. Why?

  40. Explain the reactions taking place in the mitochondrial inner membrane.

  41. Answer all the questions 

    2 x 5 = 10
  42. Explain Lysogenic cycle of a phage.

  43. Observe the animal below and answer the following questions.

    a. Identify the animal
    b. What type of symmetry does this animal exhibit?
    c. Is this animal Cephalized?
    d. How many germ layers does this animal have?
    e. How many openings does this animal's digestive system have?
    f. Does this animal have neurons?

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