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NEET-XII-Biology

Previous Year Paper year:2021

with Solutions - page 2

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  • Qstn #14
    The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is referred as:
    (A)Climax
    (B)Climax community
    (C)Standing state
    (D)Standing crop
    digAnsr:   C
    :
  • Qstn #15
    Amensalism can be represented as:
    (A)Species `` A (-) `` ; Species `` B (0) ``
    (B)Species `` A(+) `` ; Species `` B(+) ``
    (C)Species `` A (-) `` ; Species `` B (-) ``
    (D)Species `` A(+) `` ; Species `` B(0) ``
    digAnsr:   A
    :
  • Qstn #16
    Match List-I with List-II

    List I List II
    a Cohesion i More attraction in liquid phase
    b Adhesion ii Mutual attraction among water molecules
    c Surface tension iii Water loss in liquid phase
    d Guttation iv Attraction towards polar surfaces
    Choose the correct answer from the options given below.
    (A)
    (a) - (ii) ,
    (b) - (iv),
    (c) - (i) ,
    (d) - (iii)
    (B)
    (a) - (iv) ,
    (b) - (iii),
    (c) - (ii) ,
    (d) - (i)
    (C)
    (a) - (iii) ,
    (b) - (i),
    (c) - (iv) ,
    (d) - (ii)
    (D)
    (a) - (ii) ,
    (b) - (i),
    (c) - (iv) ,
    (d) - (iii)
    digAnsr:   A
    :
  • Qstn #17
    Which of the following is not an application of `` PCR `` (Polymerase Chain Reaction)?
    (A)Molecular diagnosis
    (B)Gene amplification
    (C)Purification of isolated protein
    (D)Detection of gene mutation
    digAnsr:   C
    :
  • Qstn #18
    During the purification process for recombinant DNA technology, addition of chilled ethanol precipitates out :
    (A)RNA
    (B)DNA
    (C)Histones
    (D)Polysaccharides
    digAnsr:   B
    :
  • Qstn #19
    In the equation `` GPP - R = NPP `` R represents :
    (A)Radiant energy
    (B)Retardation factor
    (C)Environment factor
    (D)Respiration losses
    digAnsr:   D
    :
  • Qstn #20
    The first stable product of `` CO _{2} `` fixation in sorghum is:
    (A)Pyruvic acid
    (B)Oxaloacetic acid
    (C)Succinic acid
    (D)Phosphoglyceric acid
    digAnsr:   B
    :
  • Qstn #21
    Which of the following algae produce Carrageen?
    (A)Green algae
    (B)Brown algae
    (C)Red algae
    (D)Blue-green algae
    digAnsr:   C
    :
  • Qstn #22
    Which of the following statements is not correct?
    (A)Pyramid of biomass in sea is generally inverted.
    (B)Pyramid of biomass in sea is generally upright.
    (C)Pyramid of energy is always upright.
    (D)Pyramid of numbers in a grassland ecosystem is upright.
    digAnsr:   B
    :
  • Qstn #23
    Match List - I with List - II .

    List I List II
    a Cristae i Primary constriction in chromosome
    b Thylakoids ii Disc-shaped sacs in Golgi apparatus
    c Centromere iii Infoldings in mitochondria
    d Cisternae iv Flattened membranous sacs in stroma of plastids
    Choose the correct answer from the options given below.
    (A)
    (a) - (iv) ,
    (b) - (iii) ,
    (c) - (ii) ,
    (d) - (i)
    (B)
    (a) - (i) ,
    (b) - (iv) ,
    (c) - (iii) ,
    (d) - (ii)
    (C)
    (a) - (iii) ,
    (b) - (iv) ,
    (c) - (i) ,
    (d) - (ii)
    (D)
    (a) - (ii) ,
    (b) - (iii) ,
    (c) - (iv) ,
    (d) - (i)
    digAnsr:   C
    :
  • Qstn #24
    Which of the following are not secondary metabolites in plants?
    (A)Morphine, codeine
    (B)Amino acids, glucose
    (C)Vinblastin, curcumin
    (D)Rubber, gums
    digAnsr:   B
    :
  • Qstn #25
    Which of the following algae contains mannitol as reserve food material?
    (A)Ectocarpus
    (B)Gracilaria
    (C)Volvox
    (D)Ulothrix
    digAnsr:   A
    :
  • Qstn #26
    A typical angiosperm embryo sac at maturity is :
    (A)8-nucleate and 7-celled
    (B)7-nucleate and 8-celled
    (C)7-nucleate and 7-celled
    (D)8-nucleate and 8-celled
    digAnsr:   A
    :
  • Qstn #27
    Diadelphous stamens are found in :
    (A)China rose
    (B)Citrus
    (C)Pea
    (D)China rose and citrus
    digAnsr:   C
    :
  • Qstn #28
    When gene targetting involving gene amplification is attempted in an individual's tissue to treat disease, it is known as :
    (A)Biopiracy
    (B)Gene therapy
    (C)Molecular diagnosis
    (D)Safety testing
    digAnsr:   B
    :
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