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1. The purpose of shimming is to

A. stabilize the static magnetic field B. obtain homogeneity of the B1 field C. find the lock frequency D. obtain homogeneity of the static magnetic field

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2. Aroma in rice is due to

A. Acetyl choline B. 4-benzyl pyrroline C. 2-ethyl pyrroline D. 2-acetyl-1-pyrroline

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3. Independently folded functional unit of a protein is called a

A. motif B. fold C. domain D. module

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4. Why is the infrared absorption for the stretching motion of internal alkynes rarely observed

A. They do not form cations B. C = C stretching does not change the dipole moment C. They are too strong D. The force constant for stretching of C = C is too high

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5. One part per million is the same as

A. 1μg/g B. 1 mg/kg C. 1ng/mg D. All of the above are correct

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6. Pomato is a ________plant

A. genetically modified B. somatic hybrid C. cloned D. rDNA plant

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7.
The above reaction is known as

A. Schmidt reaction B. Curtius reaction C. Hofmann rearrangement D. Lossen rearrangement

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8. In a HPLC, a RI detector is a –––––––––– detector and is limited to ––––– elution

A. universal, gradient B. temperature sensitive, gradient C. solvent selective, isocratic D. universal, isocratic

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9. Bischler-Napieraski reaction is used for the synthesis of

A. Quinoline B. Isoquinoline C. Substituted pyrrole D. 2-Methyl quinoline

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10. Carboxylic acids and amides have in general higher boiling points than esters and anhydrides because of which property

A. dispersion forces B. resonance stabilization C. conjugated functional groups D. hydrogen bonding

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11. Polymethyl methacrylate (PMMA) is known as

A. Perspex B. Bakelite C. Teflon D. Nylon-6

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12. Provide the structure of the major organic product in the following reaction

A. B. C. D.

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13. Which of the following cell types is unlikely to be infected by viruses

A. Nerve cell B. Red blood cell C. Liver cell D. White blood cell

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14. Normal microbiota is helpful to human as they produce

A. Vitamín A B. Vitamin C C. Vitamin K D. Vitamin E

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15. Which of the following might cause an increase in the fluorescence properties of a molecule

A. decrease the temperature of sample B. increasing the temperature of sample C. addition of O₂ D. decreasing the viscosity of the sample

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16. A mixture contains alcohol and water in the ratio 4:3. If 5 liters of water is added to the mixture, the ratio becomes 4:5. Find the quantity of alcohol in the given mixture

A. 10 B. 12 C. 15 D. 18

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17. In response to DNA damage, p53 can mediate

A. cell cycle arrest only B. either cell cycle arrest or apoptosis C. apoptosis only D. cell division

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18. Which of the following is a distinguishing test between monosaccharides and disaccharides

A. Bial's test B. Seliwanoff's test C. Barfoed's test D. Hydrolysis test

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19. Guduchi or amrita or giloy is a common name of

A. Chrysopogon zizanioides (Poaceae) B. Desmodium gangeticum (Fabaceae) C. Centella asiatica (Umbelliferae) D. Tinospora cordifolia (Menispermaceae)

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20. Zydis, oral disintegrating tablet, is produced by lyophilizing or freeze-drying the drug in a matrix, usually of

A. Gelatin B. Macrogol C. Sodium croscarmellose D. None of the above