BIOLOGY TIMES — January 2018

(ff) #1

  1. Match the following mineral elements with their
    deficiency symptoms and choose the correct

    option
    Column I Column II
    A. Calcium 1. Chlorotic veins
    B. Potassium 2. Delayed germination
    of seeds
    C. Zinc 3. Necrosis of young
    leaves
    D. Iron 4. Scorched leafing
    E. Phosphorus 5. Malformed leaves
    (a) A - 3, B - 1, C - 5, D - 2, E - 4
    (b) A - 1, B - 4, C - 5, D - 3, E - 2
    (c) A - 3, B - 4, C - 5, D - 1, E - 2
    (d) A - 2, B - 3, C - 4, D - 1, E - 5

  2. A plant growing in complete darkness shows
    .............
    (a) Vernalisation (b) Photoperiodism
    (c) Etiolation (d) Parthenocarpy

  3. Gemma cups are found in
    (a) Marchantia (b) Polytrichum
    (c) Pteris (d) Angiopteris

  4. Exine of pollen grain is composed
    (a) Lignin (b) Lignocelluloses
    (c) Pectocellulose (d) Sporopollenin

  5. Gynaecomastia is a common feature seen in
    (a) Down’s syndrome (b)Klinefelter’s syndrome
    (c) Turner’s syndrome (d) PKU

  6. A perennial plant differs from biennial in
    (a) Having asexual reproductive structures
    (b) Having underground perennating structures
    (c) Being tree species
    (d) Not drying after seasonal production of
    flowers

  7. Cristae are associated with which of the
    following?
    (a) Mitochondria (b) Lysosomes
    (c) Golgi body (d) Endoplasmic reticulum

  8. Read the statement A–D :-
    (A) The community that is near equilibrium with
    the environment is called climax community.
    (B) The gradual and fairly predictable change in
    the species composition of a given area is called
    ecological succession.
    (C) The species that invade a bare area is called
    pioneer community.
    (D) Hydrarch succession takes place in dry areas.
    How many above statements are correct?
    (a) Two (b) Three (c) Four (d) One

  9. Post transcriptional modification in Eukaryotes is

    referred as
    (a) Translation (b) Splicing
    (c) Sequencing (d) Restriction
    22. Which of the following is not the feature of
    plasmid?
    (a) Transferable (b) Circular structure
    (c) Independent replication (d) Single strand
    23. Vascular bundles in the stem of Cucurbita or
    Lagenaria are
    (a) Inverted (b) Radial
    (c) Collateral (d) Biocollateral
    24. Cyclosporin A, an immunosuppressive agent
    commercially obtained from
    (a) Trichoderma viridea
    (b) Trichoderma harzianum
    (c) Trichoderma polysporum
    (d) Trichoderma reesei
    25. Chemosynthetic bacteria obtain energy from
    (a) Sun (b) Infra red rays
    (c) Organic substances (d) Inorganic chemicals
    26. Match the terms in column I and column II
    Column I Column II
    A. Decline in death rate 1. Polymorphism
    B. Complete count of 2. Antindividuals in an
    population area
    C. Honeybee 3. Population explosion
    D. Polygamous 4. Census
    E. Pheromone 5. Peacock
    6. Population crash
    (a) A-3, B-4, C-1, D-6, E-2
    (b) A-3, B-4, C-2, D-5, E-2
    (c) A-3, B-4, C-1, D-5, E-2
    (d) A-6, B-3, C-1, D-5, E-2
    27. Bacteria genetically engineered to express a gene
    from a plant will
    (a) Not be able to synthesise a protein because
    translation is coupled with transcription and
    post transcriptional processing does not
    occur in it.
    (b) Not be able to synthesise a protein due to the
    presence of exon splicing sequences in the
    DNA sequence from the plant
    (c) Synthesise a protein with the same sequence
    of amino acids as in the plant and therefore
    the protein will have the same structure and
    function as in the plant
    (d) Synthesise a protein with essentially
    the same sequence of amino acids as in
    the plant with differences relating to different
    codon wobble rules between prokaryotes and
    eukaryotes.
    28. Long distance transport of substance within a
    plant cannot be done by diffusion alone. Diffusion
    is a slow process. The movement of a molecule
    across a typical plant cell is about 50 μm takes
    approximately

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