Advanced Biotech Miscellaneous
- 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.
- 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.
- 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.
- 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.
- 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.