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July 1st, 2014, 08:04 AM
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JNU University Pre Ph.d Exam Biotechnology Question Paper
I am searching here question paper for Pre Ph.d biotechnology subject examination of Jawaharlal Nehru University Delhi ? Here I am giving you question paper for Pre Ph.d biotechnology subject examination of Jawaharlal Nehru University Delhi in a PDF file attached with it . Which of the following represents the most reduced form of carbon? (a) R-CH3 (b) R-COOH (c) R-CHO (d) R-CH2OH 2. The Km (Michaelis constant) of an enzyme for a substrate is defined operationally as (a) half the substrate concentration at which the reaction rate is maximal (b) the substrate concentration at which the reaction rate is half maximal (c) the dissociation constant of the enzyme substrate complex (d) the dissociation constant of the enzyme product complex 3. Dinitrophenol (DNP) uncouples mitochondrial electron transport from oxidative phosphorylation by (a) dissipating the proton gradient (b) inhibiting cytochrome oxidase (c) dissociating the FO and F1 units of the ATP synthase complex (d) binding irreversibly to ubiquinone 4. Drugs that either stabilize or depolymerize microtubules can be used in cancer chemotherapy. Which of the following is correct concerning such drugs? (a) They stimulate the immune system (b) They prevent the chromatin condensation (c) They prevent the movement of tumour cells into other tissues (d) They interfere with mitosis 5. In humans, the Barr body is an (a) active X chromosome in females (b) active X chromosome in males (c) inactive Y chromosome in females (d) inactive X chromosome in females 6. An RNA-dependent RNA polymerase is likely to be present in the virion of a (a) DNA virus that multiplies in the cytoplasm (b) DNA virus that multiplies in the nucleus (c) minus-strand RNA virus (d) plus-strand RNA virus 7. If sucrose and monosodium glutamate (MSG) are added to a vinegar and oil salad dressing and shaken, the mixture will eventually separate into two phases of different density and polarity. Where will most of the sucrose and the MSG be located following phase separation? (a) Both will concentrate in the vinegar (b) Both will concentrate in the oil (c) Both will concentrate at the interface (d) Sucrose will concentrate in the oil and MSG will concentrate in the vinegar 8. The initial product of photosynthetic CO2 fixation in C3 plants is (a) glyceraldehyde 3-phosphate (b) dihydroxyacetone phosphate (c) 3-phosphoglycerate (d) phosphoenolpyruvate 9. Glycogen phosphorylase exists in two forms in skeletal muscle. The active form phosphorylase a is generated from phosphorylase b by (a) reversible dimerization of phosphorylase b triggered by calcium ion (b) proteolytic cleavage of a decapeptide from the N-terminus of phosphorylase b (c) protonation of the active-site histidine residue by a decrease in intracellular pH (d) ATP-dependent phosphorylation of a specific serine residue on each subunit 10. Particular RNAs that are important for development are located in distinct regions of the Drosophila embryo. This is most directly demonstrated by using (a) Western blotting (b) Northern blotting (c) in situ hybridization (d) in vitro translation Last edited by Neelurk; March 5th, 2020 at 09:08 AM. |
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