Advanced Biotech Miscellaneous


Advanced Biotech Miscellaneous

  1. Match the promoters listed in Group I with the tissues listed in Group II ​​
    Group–I​  ​​ Group–II
    P.​α–Amylase​ 1.​Endosperm
    ​​Q.​Glutenin​ 2.​Tuber
    R.​Phaseollin​ 3.​Aleurone
    S.​Patatin​ 4.​Cotyledon ​ ​










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    Patatin class- I promoter is a tissue specific potato promoter which expresses the potato gene mainly in tuber.
    Phaseollin is a promoter for cotyledon tissue.
    Genes encoding High Molecular Weight (HMW) glutenin, a wheat seed storage protein, is expressed in developing endosperm.
    Alpha amylase is a promoter for aleurone tissue.

    Correct Option: A

    Patatin class- I promoter is a tissue specific potato promoter which expresses the potato gene mainly in tuber.
    Phaseollin is a promoter for cotyledon tissue.
    Genes encoding High Molecular Weight (HMW) glutenin, a wheat seed storage protein, is expressed in developing endosperm.
    Alpha amylase is a promoter for aleurone tissue.


  1. Match the items in Group I with Group II ​​
    Group–I​  ​​
    (Vectors)
    Group–II
    ​​(Maximum DNA ​​​​​packaging)
    P.​ λ phage​ 1.​ 35–45 kb
    ​​​​Q.​ Bacterial Artificial Chromosomes (BACs) 2.​ 100–300 kb
    R.​ P1 derived Artificial Chromosomes (PACs) ​ 3.​ ≤ 300 kb ​​​
    ​​S. ​λ cosmid​ 4.​ 5–25 kb ​ ​
    ​​ ​​​









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    The cloning sites of the vectors are following: Lambda phage has size of 5-24kb, BACs have size of 5300kb, PACS have size of 100-300kb and Cosmids have size of 35-45kb.

    Correct Option: C

    The cloning sites of the vectors are following: Lambda phage has size of 5-24kb, BACs have size of 5300kb, PACS have size of 100-300kb and Cosmids have size of 35-45kb.



  1. Consider the following statements,
    ​​I.​T4 DNA ligase can catalyze blunt end ligation more efficiently than E.coli DNA ligase
    ​​II.​The ligation efficiency of T4 DNA ligase can be increased with PEG and ficoll. ​​









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    T4DNA Ligase catalyzes the formation of a phosphodiester bond between juxtaposed 5’-phosphate and 3’-hydroxyl termini in duplex DNA or RNA. The enzyme repairs single-strand nicks in duplex DNA, RNA, or DNA/RNA hybrids. It also joins DNA fragments with either cohesive or blunt termini, but has no activity on single-stranded nucleic acids. It can ligate blunt-ended DNA with much greater efficiency than E. coli DNA ligase. Unlike E. coli DNA ligase, T4DNA ligase cannot utilize NAD and it has an absolute requirement for ATP as a cofactor.
    The rates of blunt-end and cohesive-end ligation of DNA by T4DNA ligase are increased by orders of magnitude in the presence of high concentrations of a variety of nonspecific polymers such as polyethylene glycol, Ficoll, bovine plasma albumin, or glycogen. Blunt-end ligation of small self-complementary oligodeoxyribonucleotides is also stimulated.

    Correct Option: B

    T4DNA Ligase catalyzes the formation of a phosphodiester bond between juxtaposed 5’-phosphate and 3’-hydroxyl termini in duplex DNA or RNA. The enzyme repairs single-strand nicks in duplex DNA, RNA, or DNA/RNA hybrids. It also joins DNA fragments with either cohesive or blunt termini, but has no activity on single-stranded nucleic acids. It can ligate blunt-ended DNA with much greater efficiency than E. coli DNA ligase. Unlike E. coli DNA ligase, T4DNA ligase cannot utilize NAD and it has an absolute requirement for ATP as a cofactor.
    The rates of blunt-end and cohesive-end ligation of DNA by T4DNA ligase are increased by orders of magnitude in the presence of high concentrations of a variety of nonspecific polymers such as polyethylene glycol, Ficoll, bovine plasma albumin, or glycogen. Blunt-end ligation of small self-complementary oligodeoxyribonucleotides is also stimulated.


  1. A mutant Gα protein with increased GTPase activity would ​​









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    Alpha, Beta, and Gamma are the three subunits of the G-protein. The active form is the Alpha-GTP complex. The intrinsic GTPase activity converts the bound GTP to GDP in the a - subunit, returning it to its original conformation. This results in the a - subunit diffusing from the adenylate cyclase and reassociating with the b & g subunits. Adenylate cyclase catalyses the conversion of ATP to cAMP which is then used to activate another, initially inactive, enzyme. The mutant G alpha protein with increased GTPase activity shows decreased signaling because of the group of proteins present which are specific to G alpha subunit called the regulator of G protein signaling.

    Correct Option: D

    Alpha, Beta, and Gamma are the three subunits of the G-protein. The active form is the Alpha-GTP complex. The intrinsic GTPase activity converts the bound GTP to GDP in the a - subunit, returning it to its original conformation. This results in the a - subunit diffusing from the adenylate cyclase and reassociating with the b & g subunits. Adenylate cyclase catalyses the conversion of ATP to cAMP which is then used to activate another, initially inactive, enzyme. The mutant G alpha protein with increased GTPase activity shows decreased signaling because of the group of proteins present which are specific to G alpha subunit called the regulator of G protein signaling.



  1. Match Group I with Group II ​​
    Group–I​  ​​ Group–II
    P.​Fibronectin​ 1.​Uptake of amino ​​​​ ​acids and glucose
    ​​Q.​Insulin​ 2.​Trypsin inhibitor
    R.​α-Macroglobulin​ 3.​Binds iron
    ​​S.​Transferrin​ 4.​Cell attachment ​​​​​to substratum ​ ​










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    Fibronectin is a glycoprotein that can act as general cell adhesion molecule by anchoring cells to collagen or proteoglycan substrates. Insulin is a hormone, produced by beta cells of the pancreas, and is central to regulating carbohydrate and fat metabolism in the body Insulin is a hormone that has profound effects on metabolism. alpha-2-Macroglobulin,is a large plasma protein found in the blood. It inhibits the thrombin action at the time of couagulation by blocking trypsin enzyme. Transferrins is a iron binding glycoprotein.

    Correct Option: D

    Fibronectin is a glycoprotein that can act as general cell adhesion molecule by anchoring cells to collagen or proteoglycan substrates. Insulin is a hormone, produced by beta cells of the pancreas, and is central to regulating carbohydrate and fat metabolism in the body Insulin is a hormone that has profound effects on metabolism. alpha-2-Macroglobulin,is a large plasma protein found in the blood. It inhibits the thrombin action at the time of couagulation by blocking trypsin enzyme. Transferrins is a iron binding glycoprotein.