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AFMC Biology  1999
 

AFMC Biology 1999

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AFMC Biology  1999 AFMC Biology 1999 Presentation Transcript

  • aFMC–Past papers
    BIOLOGY- UNSOLVED PAPER - 1999
  • SECTION – I (Total Marks : 50)
    Single Correct Answer Type
    There are five parts in this question. Four choices are given for each part and one of them is correct. Indicate you choice of the correct answer for each part in your answer-book by writing the letter (a), (b), (c) or (d) whichever is appropriate
    .
  • 01
    Problem
    Formation of primitive streak in the chick embryo is the first sign of
    Notogenesis
    Nlastulation
    Neurilation
    Gastrulation.
  • Problem
    02
    Which hormone promotes cell division, protein synthesis and bone growth?
    PTH
    ACTH
    ADH
    GH
  • Problem
    03
    Which of the following has non-myelinatednervefibres?
    Optic nerves
    Autonomic nerves
    Cranial nerves
    Spinal nerves
  • Problem
    04
    Which of the following is true about cleavage in the fertilised egg in humans?
    It is identical to the normal mitosis
    It starts when the egg is in fallopian tube
    It starts when the egg reaches uterus
    It is meroblastic
  • Problem
    05
    Mammalian brain differs from an amphibian brain in possessing
    Olfactory lobe
    Hypothalamus
    Cerebellum
    Corpus callosum
  • Problem
    06
    Jacobson's organ is concerned with
    Touch
    Hearing
    Smell
    Sight
  • Problem
    07
    Adjacent epithelial cells are held together by
    Iysosomes
    Glyoxysomes
    Desmosomes
    Microsomes 
  • Problem
    08
    Which of the following is true for DNA helices?
    DNA helices are ATP dependent unwinding enzymes
    Promote separation of the two parental strands and establish replication forks
    DNA helices hydrolyze ATP
    All of these
  • Problem
    09
    What is the name of cycle which generates energy and splits water into hydrogen and oxygen?
    Glycogenolysis
    Citric acid cycle
    Photophosphorylation
    Electron transport chain
  • Problem
    10
    Tendons and ligaments are tissues of the category of
    vascular tissue
    Epithelial tissue
    Skeletal tissue
    Connective tissue
  • Problem
    11
    Antedon belongs to
    Asteroida
    Crinoidea
    Ophiuroidea
    Echinoidea
  • Problem
    12
    Sub-class prototheria is related with egg laying mammals such as
    Kangaroo
    Echidna
    Ornithorhynchus
    Both (b) and (c)
  • Problem
    13
    The maintenance of internal favourable conditions, by a self regulated mechanisms, in spite of the fact that there are changes in the environment, is known as
    Enthalpy
    Steady state
    Entropy
    Homeostasis
  • Problem
    14
    RNA retroviruses have a special enzyme that
    Disintegrates host DNA
    Polymerises host DNA
    Transcribe viral RNA to c-DNA
    Translates host DNA.
  • Problem
    15
    The nephrostomes, in the kidneys, are functional in
    Adult frog
    Cockroach
    Tadpole
    Rabbit
  • Problem
    16
    Bidder's canal is found in
    Kidney of frog
    Kidney of mammal
    Ovary of mammal
    Testes of frog
  • Problem
    17
    The main function of Henle's loop is
    Passage of urine
    Filtration of blood
    Formation of urine
    Conservation of water
  • Problem
    18
    Peeling of ozone umbrella, which protects us from UV-rays, is caused by
    C02
    PAN
    CFCs
    Coal burning
  • Problem
    19
    The correct sequence of food chain is
    grass -> wolf-> deer ->buffalo
    grass ->insect-> birds-> snake
    bacteria -> grass-> rabbit-> wolf
    grass -> snake -> insect -> deer
  • Problem
    20
    Sickle-cell anaemia is one of the good examples for which of the following?
    Pleiotropy
    Co-dominance
    Epistasis
    Incomplete dominance
  • Problem
    21
    Diphtheria is caused by which of the following?
    Virus
    Fungi
    Bacteria
    Algae 
  • Problem
    22
    Ancestral amphibians were tetrapods that evolved during
    Jurassic period
    Cretaceous period
    Devonian period
    Carboniferous period
  • Problem
    23
    During elongation of polypeptide chain (in translation), the sigma factor is
    Used during the closing of chain
    Released to take part again
    Retained and it performs special function
    Functionless
  • Problem
    24
    Which of the following is a salt balancing hormone?
    Folliotropin
    Glucocorticoid
    Somatotrophin
    Mineralocorticoid
  • Problem
    25
    The term 'niche' of a species refers to
    Specific place where an organism lives
    Competitive power of an organism
    Specific function of organism
    Specific and habitual function
  • Problem
    26
    Pyramid of energy, in a pond ecosystem, is always
    Upright only
    Irregular
    Inverted
    Linear
  • Problem
    27
    The treeless biomes include
    Tundra
    Deserts
    Grassland
    All of these
  • Problem
    28
    When fungi feed on dead organic matter, they are known as
    Parasites
    Saprophytes
    Dimorphic
    None of these
  • Problem
    29
    The antherozoids of Marchantia are
    Short, curved and biflagellate
    Long, straight and biflagellate
    Short, straight and multiflagellate
    Long curved and biflagellate
  • Problem
    30
    Gymnosperms lack fruit, because they lack
    Ovule
    Seed
    Ovary
    Embryo 
  • Problem
    31
    Territoriality occurs as a result of
    Predation
    Competition
    Co-operation
    Parasitism
  • Problem
    32
    In monocots, grafting is almost impossible because they lack
    Vascular bundle
    Parenchymatous cells
    Ground tissue
    Cambium
  • Problem
    33
    The thurioside is a proteinaceous toxin, which is obtained from
    Green manure
    Farmyard manure
    Bacterial origin
    Biofertilisers
  • Problem
    34
    Which of the following statements is correct?
    Legumes fix nitrogen only through specialized bacteria that live in their leaves
    Legumes fix nitrogen independently of the specialized bacteria that live in their roots
    Legumes fix nitrogen only through the specialized bacteria that live in their roots
    Legumes are incapable of fixing nitrogen.
  • Problem
    35
    The mutations can be induced in bacteria by
    Growing different strains
    Adding all required substances
    Exposure to high energy radiations
    Starving the bacteria
  • Problem
    36
    From which of the following is agar obtained ?
    Gelidium
    Batrachospermum
    Gracilaria
    All of these
  • Problem
    37
    Most of the water, in mature plant cells, occurs chiefly in which of the following?
    Cell wall
    Cytoplasm
    Vacuoles
    Nucleus
  • Problem
    38
    How many meiotic divisions are required to produce 100 pollen grains?
    70
    25
    125
    100
  • Problem
    39
    Anaerobic respiration is also called
    Fragmentation
    Multiplication
    Fermentation
    Restoration
  • Problem
    40
    The closing and opening of the leaves of Mimosa pudica is due to
    Hydrotropic movement
    Chemonastic movement
    Seismonastic movement
    Thermonastic movement.
  • Problem
    41
    The soil particles, particularly clay and organic matter in soil, contain negative charges that attract positively charged ions such as
    K++
    Mg+
    Ca++
    All of these
  • Problem
    42
    In double fertilization, the male gamete and secondary nucleus give rise to
    Embryo
    Gametes
    Egg
    Endosperm
  • Problem
    43
    Radioactive tracer studies with ,4C have confirmed that
    Phloem transports organic nutrients
    Xylem transports organic nutrients
    Phloem transports inorganic nutrients
    Xylem transports organic nutrients
  • Problem
    44
    A clone is a group of individuals obtained through
    Cross-pollination
    Self-pollination
    Vegetative propagation
    Hybridization
  • Problem
    45
    Which of the following eras, in geological time- scale, corresponds to the period when life had not originated upon the earth?
    Mesozoic
    Archaeozoic
    Palaeozoic
    Azoic.
  • Problem
    46
    The crossing over frequency is proportional to
    Haploid number of chromosome
    Diploid number of chromosome
    Recombinant phenotypic frequency
    Genotypic frequency
  • Problem
    47
    The polytene chromosomes were discovered for the first time in
    Drosophila
    Muscadomestica
    Chironomos
    Muscanebulo
  • Problem
    48
    In submerged plants, the stomata lie on
    Not on any surface
    Both upper and lower surfaces
    Upper surface
    Lower surface
  • Problem
    49
    A fruit, developing from an inflorescence, is called
    Etaerio of achenes
    Composite fruit
    Etaerio
    None of these
  • Problem
    50
    Beauty of flower Bougainvillea is due to
    Androecium
    Bract
    Calyx
    Corolla
  • For solution visit www.vasista.net