NEET-XII-Biology

E1 year:2020

divided into subjects - page 2

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  • Qstn #16
    Which of the following statements about inclusion
    bodies is incorrect ?
    (1) They are not bound by any membrane.
    (2) These are involved in ingestion of food
    particles.
    (3) They lie free in the cytoplasm.
    (4) These represent reserve material in
    cytoplasm.
    digAnsr:   2
    Ans : 2
  • Qstn #17
    Which is the important site of formation of
    glycoproteins and glycolipids in eukaryotic cells ?
    (1) Endoplasmic reticulum
    (2) Peroxisomes
    (3) Golgi bodies
    (4) Polysomes
    digAnsr:   3
    Ans : 3
  • Qstn #18
    In gel electrophoresis, separated DNA fragments
    can be visualized with the help of :
    (1) Acetocarmine in bright blue light
    (2) Ethidium bromide in UV radiation
    (3) Acetocarmine in UV radiation
    (4) Ethidium bromide in infrared radiation
    digAnsr:   2
    Ans : 2
  • Qstn #19
    Identify the wrong statement with reference to
    transport of oxygen.
    (1) Binding of oxygen with haemoglobin is
    mainly related to partial pressure of ``\ce{``\ce{``\ce{O2}``}``}``
    (2) Partial pressure of ``\ce{C``\ce{``\ce{O2}``}``}``
    can interfere with``\ce{``\ce{``\ce{O2}``}``}``
    binding with haemoglobin.
    (3) Higher ``\ce{H+}`` conc. in alveoli favours the
    formation of oxyhaemoglobin.
    (4) Low p``\ce{CO}``
    2
    in alveoli favours the formation
    of oxyhaemoglobin.
    digAnsr:   3
    Ans : 3
  • Qstn #20
    Ray florets have :
    (1) Inferior ovary
    (2) Superior ovary
    (3) Hypogynous ovary
    (4) Half inferior ovary
    digAnsr:   1
    Ans : 1
  • Qstn #21
    The specific palindromic sequence which is
    recognized by EcoRI is :
    (1) 5' - GAATTC - 3'
    3' - CTTAAG - 5'
    (2) 5' - GGAACC - 3'
    3' - CCTTGG - 5'
    (3) 5' - CTTAAG - 3'
    3' - GAATTC - 5'
    (4) 5' - GGATCC - 3'
    3' - CCTAGG - 5'
    digAnsr:   1
    Ans : 1
  • Qstn #22
    Identify the wrong statement with regard to
    Restriction Enzymes.
    (1) Each restriction enzyme functions by
    inspecting the length of a DNA sequence.
    (2) They cut the strand of DNA at palindromic
    sites.
    (3) They are useful in genetic engineering.
    (4) Sticky ends can be joined by using DNA
    ligases.
    digAnsr:   4
    Ans : 4
  • Qstn #23
    Which of the following is put into Anaerobic sludge
    digester for further sewage treatment ?
    (1) Primary sludge
    (2) Floating debris
    (3) Effluents of primary treatment
    (4) Activated sludge
    digAnsr:   4
    Ans : 4
  • Qstn #24
    Select the correct events that occur during
    inspiration.
    -(a) Contraction of diaphragm
    (b) Contraction of external inter-costal muscles
    (c) Pulmonary volume decreases
    (d) Intra pulmonary pressure increases
    (1) -(a) and (b)
    (2) (c) and (d)
    (3) -(a), (b) and (d)
    (4) only (d)
    digAnsr:   1
    Ans : 1
  • Qstn #25
    If the head of cockroach is removed, it may live for
    few days because :
    (1) the supra-oesophageal ganglia of the
    cockroach are situated in ventral part of
    abdomen.
    (2) the cockroach does not have nervous system.
    (3) the head holds a small proportion of a nervous
    system while the rest is situated along the
    ventral part of its body.
    (4) the head holds a 1/3rd of a nervous system
    while the rest is situated along the dorsal
    part of its body.
    digAnsr:   3
    Ans : 3
  • Qstn #26
    Which of the following statements are true for
    the phylum-Chordata ?
    -(a) In Urochordata notochord extends from
    head to tail and it is present throughout
    their life.
    (b) In Vertebrata notochord is present during
    the embryonic period only.
    (c) Central nervous system is dorsal and
    hollow.
    (d) Chordata is divided into 3 subphyla :
    Hemichordata, Tunicata and
    Cephalochordata.
    (1) (d) and (c)
    (2) (c) and -(a)
    (3) -(a) and (b)
    (4) (b) and (c)
    digAnsr:   4
    Ans : 4
  • Qstn #27
    Match the organism with its use in biotechnology.


    -(a) Bacillus thuringiensis (i) Cloning vector
    (b) Thermus aquaticus (ii) Construction of first rDNA molecule
    (c) Agrobacterium tumefaciens (iii) DNA polymerase
    (d) Salmonella typhimurium (iv) Cry proteins

    Select the correct option from the following :
    -(a) (b) (c) (d)
    (1) (ii) (iv) (iii) (i)
    (2) (iv) (iii) (i) (ii)
    (3) (iii) (ii) (iv) (i)
    (4) (iii) (iv) (i) (ii)
    digAnsr:   2
    Ans : 2
  • Qstn #28
    Match the following concerning essential elements
    and their functions in plants :
    -(a) Iron (i) Photolysis of water
    (b) Zinc (ii) Pollen germination
    (c) Boron (iii) Required for chlorophyll
    biosynthesis
    (d) Manganese (iv) IAA biosynthesis
    Select the correct option :
    -(a) (b) (c) (d)
    (1) (ii) (i) (iv) (iii)
    (2) (iv) (iii) (ii) (i)
    (3) (iii) (iv) (ii) (i)
    (4) (iv) (i) (ii) (iii)
    digAnsr:   3
    Ans : 3
  • Qstn #29
    Identify the incorrect statement.
    (1) Heart wood does not conduct water but gives
    mechanical support.
    (2) Sapwood is involved in conduction of water
    and minerals from root to leaf.
    (3) Sapwood is the innermost secondary xylem
    and is lighter in colour.
    (4) Due to deposition of tannins, resins, oils etc.,
    heart wood is dark in colour.
    digAnsr:   3
    Ans : 3
  • Qstn #30
    Match the following :
    -(a) Inhibitor of catalytic (i) Ricin
    activity
    (b) Possess peptide bonds (ii) Malonate
    (c) Cell wall material in (iii) Chitin
    fungi
    (d) Secondary metabolite (iv) Collagen
    Choose the correct option from the following :
    -(a) (b) (c) (d)
    (1) (ii) (iv) (iii) (i)
    (2) (iii) (i) (iv) (ii)
    (3) (iii) (iv) (i) (ii)
    (4) (ii) (iii) (i) (iv)
    digAnsr:   1
    Ans : 1