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GATE 2017-2018 :: GATE Biotechnology

GATE Biotechnology - Practice Test Paper 1
GATE Biotechnology - Practice Test Paper 2
  1. In mismatch correction repair, the parental DNA strand is distinguished from the daughter strand by
    2. A.
    acetylation
    B.
    phosphorylation
    C.
    methylation
    D.
    glycosylation

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  2. The basis for blue-white screening with pUC vectors is
    3. A.
    intraallelic complementation
    B.
    intergenic complementation
    C.
    intragenic suppression
    D.
    extragenic suppression

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  3. Idiotypic determinants of an antibody are associated with the
    4. A.
    constant region of the heavy chains
    B.
    constant region of the light chains
    C.
    variable region
    D.
    constant regions of light and heavy chains

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  4. Identification of blood groups involves
    5. A.
    precipitation
    B.
    neutralization
    C.
    opsonization
    D.
    agglutination

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  5. B-lymphocytes originate from the bone marrow whereas T-lymphocytes originate from
    6. A.
    thymus
    B.
    bone marrow
    C.
    spleen
    D.
    liver

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  6. A humanized antibody is one in which the
    7. A.
    heavy and light chains are from human
    B.
    heavy chain is from human and light chain is from mouse
    C.
    light chain is from human and heavy chain is from mouse
    D.
    CDRs are from mouse, and the rest is from human

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  7. Dimethyl sulfoxide (DMSO) is used as a cryopreservant for mammalian cell cultures because
    8. A.
    it is an organic solvent
    B.
    it easily penetrates cells
    C.
    it protects cells by preventing crystallization of water
    D.
    it is also utilized as a nutrient

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  8. Nude mice refers to
    9. A.
    mice without skin
    B.
    mice without thymus
    C.
    knockout mice
    D.
    transgenic mice

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  9. Heat inactivation of serum is done to inactivate
    10. A.
    prions
    B.
    mycoplasma
    C.
    complement
    D.
    pathogenic bacteria

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  10. Choose the correct signal transduction pathway.
    11. A.
    Hormone → 7 TM receptor → G protein → cAMP → PKA
    B.
    Hormone → G protein → 7 TM receptor → cAMP → PKA
    C.
    Hormone → 7 TM receptor → G protein → PKA → cAMP
    D.
    Hormone → 7 TM receptor → cAMP → G protein → PKA

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