TRY OUT SMA GONZAGA OLIMPIADE SCIENCE

1.       Mycobacterium leprae causes leprosy, Corynebacterium diphtheria causes diphtheria and Vibrio comma causes

A.      tetanus

B.      influenza

C.      cholera

D.      typhoid

2.       Ptyalin is an enzyme produced in the 8 rated thisReport error

A.      salivary glands

B.      pituitary glands

C.      thyroid glands

D.      pancreas

3.       Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?

A.      By cyanobacteria

B.      By electrical discharges in the atmosphere

C.      By industrially synthesised fertilizer

D.      By denitrification

4.       Pollen grains in plants are produced in

A.      roots

B.      leaves

C.      flower

D.      stem

5.       Pollination by wind is called

A.      anemophily

B.      hydrophily

C.      zoophily

D.      entomophily

6.       Mutation is

A.      a factor responsible for plant growth

B.      a change which affects the offspring of F2 generation only

C.      a change that is inherited

D.      a change which affects the parents

7.       Oxyreductases, transferases, hydrolases, lyases, isomerases and ligases are all classes of

A.      hormones

B.      enzymes

C.      proteins

D.      vitamins

8.       Plants that grow under average temperature and moisture are called

A.      halophytes

B.      hydrophytes

C.      mesophytes

D.      xerophytes

9.       One day you wake with a sore throat and a runny nose. Your doctor takes a swab from your throat, sends it to a lab, and telephones you the next day to say that antibiotic will not help you get better. Which of the following is the most likely reason for the doctor's statement?

A.      Having waited a day, it is too late to take an antibiotic

B.      You need an antiseptic, not an antibiotic

C.      You need to be vaccinated instead of taking an antibiotic

D.      You are infected by a virus

10.   Oxygen in our blood is transported by a protein named

A.      haemoglobin

B.      keratin

C.      collagen

D.      myoglobin

11.   Pulses are a good source of

A.      carbohydrates

B.      fats

C.      proteins

D.      vitamins

12.   One of the following is most suitable for study of mutations

A.      Haploids

B.      Diploids

C.      Tetraploids

D.      Polyploid

13.   Plants are killed in winter by frost

A.      because of desiccation and mechanical damage to the tissues

B.      because no photosynthesis takes place at such low temperature

C.      because respiration ceases at such low temperature

D.      because there is no transpiration

14.   Number of chromosomes in Down's syndrome is

A.      46

B.      47

C.      48

D.      49

.

15.   Rain water helps to increase the ____ to some extent.

A.      phosphorous contents

B.      nitrogen contents

C.      calcium contents

D.      potash contents

16.    Mumps is a disease caused by

A.      fungus

B.      bacterium

C.      virus

D.      None of these

17.   Most abundant tissues of our body are

A.      muscular

B.      connective

C.      epithelial

D.      nervous

18.   Most common disease of poultry in India is

A.      fowl pox

B.      tick fever

C.      ranikhet

D.      coryza

19.   Radish is a

A.      bulb

B.      conn

C.      modified root

D.      tuber

20.   Outer covering of virus made up of protein is

A.      capsid

B.      coat

C.      virion

D.      viriod

21.   Movements due to light are shown by

A.      flowering plants

B.      lower plants

C.      Call land plants

D.      Dall the plants

E.       Lock answer Show answer Discuss

22.   Our major foods, fibres, spices, fruits and beverage crops are

A.      flowering plants

B.      gymnosperms plants

C.      pteridophytes

D.      bryophytes

23.    Organic Substances which, in very small amounts, control growth and development called

A.      vitamins

B.      hormones

C.      enzymes

D.      None of the above

24.   Radioactivity is a phenomenon of the spontaneous emission of

A.      protons (alpha particles)

B.      electrons (beta particles)

C.      gamma rays (short wave electromagnetic waves)

D.      All of the above

25. Monocot root differs from dicot root in having

A.    open vascular bundles

B.    scattered vascular bundles

C.    well developed pith

D.    radially arranged vascular bundles

26. Night blindness is cause by lack of which vitamin?

A.      Vitamin A

B.      Vitamin B

C.      Vitamin C

D.      Vitamin D

27. Norepinephrine increases

A.      respiration

B.      urine production

C.      saliva production

D.      blood pressure

28. Pigmentation of skin is due to

A.      lymphocytes

B.      monocytes

C.      leucocytes

D.      melanocytes

29. Photosynthesis is a process

A.      reductive and exergonic

B.      reductive and catabolic

C.      reductive, endergonic and catabolic
D.      reductive, endergonic and anabolic

30. Osmosis is the flow of solution from higher concentration to a solution of lower concentration through a semi permeable membrane. What is incorrect in this statement?

A.      Exact concentration of solution is not given

B.      Character of semi permeable membrane is not given

C.      The flow of solution is not possible through semi permeable membrane

D.      All are incorrect

31. Plant have ____ while animals lack it.

A.      starch

B.      cellulose

C.      protein

D.      fat

32. Plant bends towards the source of light on account of the movement of curvature known as

A.      geotropism

B.      thigmotropism

C.      chemotropism

D.      phototropism

33. Radical vascular bundles are those in which

A.      xylem is surrounded by phloem

B.      phloem is surrounded by xylem

C.      xylem and phloem occur on the same radius

D.      xylem and phloem occur on the different radii

34. Poison glands of snakes are homologous to

A.      electric organs of fishes

B.      stings of rays

C.      sebaceous glands of mammals

D.      salivary glands of vertebrates

35. Monotremes are unique mammals because they

A.      posses hair

B.      give birth to live young

C.      secret milk in a pouch

D.      lay eggs

36. Plants wilt due to excess of

A.      transpiration

B.      photosynthesis

C.      absorption

D.      None of these

37. Normal adult human male has

A.      10 gram of haemoglobin/100 gram of blood

B.      14 gram of haemoglobin/100 gram of blood

C.      18 gram of haemoglobin/100 gram of blood

D.      24 gram of haemoglobin/100 gram of blood

38. Ramapithecus and Cro-Magnon man are considered

A.      ancestors of modern man

B.      ancestors of monkey

C.      ancestors of lion

D.      None of the above

39. Our skin, when exposed to excess sunlight, becomes dark. This is because our skin pigments called

A.      flavoxanthin

B.      melanin

C.      carotene

D.      Xanthophyll

40. Plants growing on sand are called as

A.      chasmophytes

B.      oxylophytes

C.      lithophytes

D.      psammophytes

41. Plants developing in dry conditions are

A.      xerophytes

B.      mesophytes

C.      lithophytes

D.      hydrophytes

42. Most of the red, blue and purple colours of plants are due to a pigment called

A.      anthocyanin

B.      carotene

C.      chlorophyll

D.      xanthophylls

43. Myopia is connected with

A.      ears

B.      eyes

C.      lungs

D.      None of these

44. Prothrombin which helps in clotting of blood is released by

A.      lymphocytes

B.      erythrocytes

C.      monocytes

D.      blood platelets

45. Of the following taxonomic categories which is the most inclusive (i.e. is the highest in hierarchy)?

A.      Order

B.      Subspecies

C.      Class

D.      Genus

46. Potato is a modified form (outgrowth) of

A.      root

B.      stem

C.      fruit

D.      leaf

47. out of proteins, lipids and carbohydrates present in a cell membrane, what is true?

A.      Lipids are maximum

B.      Carbohydrates are minimum

C.      Carbohydrates are maximum

D.      All three are in equal proportion

48. N2 content is kept constant in the biosphere due to

A.      N2 fixation

B.      industrial pollution

C.      nitrogen cycle

D.      absorption of N2

49. Phloem is a tissue found in

A.      reproductive organs of animals

B.      plants

C.      insects

D.      mammals

50. Neurospora is used as genetic material because

A.      it has short life cycle of 10 days

B.      the product of single meiosis can be easily analysed

C.      meiotic products are linearly arranged in the form of ordered tetrad

D.      is a diploid fungus

51. Plants hormone that induces cell division is

A.      auxins

B.      gibberellins

C.      kinins

D.      domins

52. Placenta is the structure formed

A.      by the union of foetal and uterine tissue

B.      by foetus only

C.      by fusion of germ layers

D.      None of these

53. O2 released in the process of photosynthesis comes from

A.      CO2

B.      water

C.      sugar

D.      pyruvic acid

51. Pyorrhoea is a disease of the

A.      nose

B.      gums

C.      eart

D.      lungs

52. Plants that grow in saline water are called

A.      halophytes

B.      hydrophytes

C.      mesophytes

D.      thallophytes

53. Other than spreading malaria, anopheles mosquitoes are also vectors of

A.      dengue fever

B.      filariasis

C.      encephalitis

D.      yellow fever

54. Primary phloem develops from

A.      lateral meristem

B.      protoderm

C.      extrastelar cambium

D.      provascular tissue

55. Nucleus, the genetic material containing rounded body in each cell, was first discovered in 1831 by

A.      Robert Hooke

B.      Robert Brown

C.      Rudolf Virchow

D.      Theodore Schwann

56. Photosynthesis takes place faster in

A.      yellow light

B.      white light

C.      red light

D.      darkness

57. Prokaryotic cells lack

A.      nucleolus

B.      nuclear membrane

C.      membrane bound by organelles

D.      All of these

58. Plant development is influenced by

A.      quality of light only

B.      quality and quantity of light

C.      quality and duration of light

D.      quality, quantity and duration of light

59. Most highly intelligent mammals are

A.      whales

B.      dolphins

C.      elephants

D.      kangaroos

60. Process of cell division can take place by

A.      heterosis

B.      fusion

C.      mitosis

D.      None of these

61. Photo-oxidation is

A.      photorespiration

B.      photolysis

C.      light and oxygen induced breakdown

D.      All of the above

62. Plants absorb most part of water needed by them through their

A.      embryonic zone

B.      growing point

C.      root hairs

D.      zone of elongation

63. One of the following is not a function of bones.

A.      Place for muscle attachment

B.      Protection of vital organs

C.      Secretion of hormones for calcium regulation in blood and bones

D.      Production of blood corpuscles

64. Out of 900 reported species of living gymnosperms, conifers are represented by about 500

species, About 2,50,000 species of angiosperms (flowering plants) have also been reported in the

world. The vast and dominant woodlands in Europe, Asia, North America and mountains such as

Himalayas are wooded with

A.      all gymnosperms, except conifers

B.      only angiosperms

C.      only conifers

D.      angiosperms and all gymnosperms except conifers

65. Plants absorb dissolved nitrates from soil and convert them into

A.      free nitrogen

B.      urea

C.      ammonia

D.      proteins

66. Plants synthesis protein from

A.      starch

B.      sugar

C.      amino acids

D.      fatty acids

67. Most fish do not sink in water because of the presence of

          I.     swim bladder

          II.     air bladder

          III.     air sacs

          IV.     air in spongy bones

A.      I and II are correct

B.      II and III are correct

C.      III and IV are correct

D.      I, II, III and IV are correct

68. Photosynthesis generally takes place in which parts of the plant?

A.      Leaf and other chloroplast bearing parts

B.      steam and leaf

C.      Roots and chloroplast bearing parts

D.      Bark and leaf

69. Movement of cell against concentration gradient is called

A.      osmosis

B.      active transport

C.      diffusion

D.      passive transport

70. Plants receive their nutrients mainly from

A.      chlorophyll

B.      atmosphere

C.      light

D.      soil

71. Pollination is best defined as

A.      transfer of pollen from anther to stigma

B.      germination of pollen grains

C.      growth of pollen tube in ovule

D.      visiting flowers by insects

72. Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to

A.      Angiosperms

B.      gymnosperms

C.      monocotyledons

D.      dicotyledons

73.   Ozone hole refers t

A.     hole in ozone layer

B.     decrease in the ozone layer in troposphere

C.     decrease in thickness of ozone layer in stratosphere

D.     increase in the thickness of ozone layer in troposphere

75. Ordinary table salt is sodium chloride. What is baking soda?

A.      Potassium chloride

B.      Potassium carbonate

C.      Potassium hydroxide

D.      Sodium bicarbonate

76. Nymph is the name of young one of

A.   butterfly

B.  beetle

C. housefly

D. cockroach

77. On which of the following plants did Gregor Mendal perform his classical experiment?

A.  Gram

B.   Maize

C.  Pea

D.  Wheat