Aim and Scope of Organic Chemistry, Composition of Organic compounds, Amino acids and proteins

Transcription

1 Aim and Scope of Organic Chemistry, Composition of Organic compounds, Amino acids and proteins By Dr.Abdus Sattar Anjuman Arts, Science & Commerce College, Bijapur Mob: First organic compound synthesized in the laboratory was a) CH 4 b) CH 3 -CO-CH 3 c) NH 2 -CO-NH 2 d) CH 3 -COOH 2. 2-Acetooxybenzoic acid is used as a) antiseptic b) antibiotics c) analgesics d) pesticide 3. Urotropine on nitration produces a) RDX b) HMX c) DDNP d) Dynamite 4. Which of the following reduces fever? a) Analgesics b) Tranquilizer c) Antipyretics d) Antibiotics 5. Drug which is used to reduce anxiety and brings calmness is known as a) Antacids b) Analgesics c) Tranquilizer d) Antipyretics 6. The drug given during hypertension is a) Chloroxylenol b) Equinil c) Aspirin d) Phenacetin 7. Pick the odd man out a) Chloramphenicol b) Ampicillin c) Penicillin G d) UDMH 8. BHT is used as a) Sedative b) Antacid c) Antioxidant d) Preservative 9. The fusion of sodium with aniline gives mainly a) NaCN b) NaN 3 c) NaSCN d) NaNO In Kjeldahl s method, nitrogen present is estimated as a) N 2 b) NH 3 c) NO 2 d) None 11. In Duma s method which of the following is estimated a) Nitrogen b) Ammonium Nitrate c) Cynogen d) Cyno benzene 12. If N & S are present in an organic compound during lassaignes test, then both changes to a) Na 2 SO 3 & NaCN b) NaSCN c) Na 2 S & NaCN d) Na 2 S & NaCNO 13. In Sodium extract test of organic compounds the nitrogen of an organic compound is converted into a) Sodamide b) Sodium cyanide c) Sodium nitrite d) Sodium nitrate 14. Lassaigne s test for the detection of nitrogen fails in case of a) NH 2 -CO-NH 2 b) NH 2 -CO-NH-NH 2 c) NH 2 -NH 2.2HCL d) C 6 H 5 -NH-NH 2.2HCL

2 15. The compound that does not give a blue colour in Lassiagne s test is a) Aniline b) Glycine c) Hydrazine d) Urea 16. In Lassaigne s test for nitrogen, the blue colour is due to the formation of a) Potassium Ferrocyanide b) Sodium cyanide c) Sodium ferrocyanide d) Ferri-ferrocyanide 17. In Lassaigne s test for sulphur in the organic compound with sodium nitroprusside solution the purple colour formed is due to a) Na 4 [Fe(CN) 5 NOS] b) Na 3 [Fe(CN) 5 S] c) Na 2 [Fe(CN) 5 NOS] d) Na 3 [Fe(CN) 6 ] 18. In Carius tube the compound ClCH2 COOH was heated with fuming HNO3 and AgNO3. After filteration and washing a white ppt is formed the precipitate is a) AgCl b) AgNO 3 c) Ag 2 SO 4 d) ClCH 2 -COOAg 19. Duma s method involves the estimation of content of nitrogen in the organic compound in the form of a) Gaseous NH 3 b) Gaseous N 2 c) NaCN d) (NH 4 ) 2 SO An organic compound containing C, H and N gave the following analysis C=40%, H=13.33% and N=46.67%. What would be its empirical formula? a) C 2 H 7 N b) C 2 H 7 N 2 c) CH 4 N d) CH 5 N 21. An alkane has a C/H ratio of by mass. Its molecular formula is a) C 5 H 12 b) C 6 H 14 c) C 8 H 18 d) C 7 H Estimation of 0.5g of an organic compound by liebig s method increases the weight of potash bulb by g. The percentage of carbon in the compound is a) 37.5% b) 60% c) 40% d) 30% 23. Catalyst used in Kjeldahl s method for the estimation of nitrogen is a) Na b) Cu c) Mg d) Hg 24. Kjeldahl s method cannot be used for the estimation of nitrogen in a) Pyridine b) Aniline c) Toluidine d) all of those 25. Medium of sodium extract by Lassaigne s method is a) acidic b) basic c) Neutral d) any one of these 26. In Liebig s method for the estimation of carbon, the CO2 produced is absorbed in the solution of a) Ca(OH)2 b) Pyrogallol c) KOH d) any one of these 27. Red coloured complex ion formed on adding FeCl3 to sodium extract when N and S both are present in organic compound is a) [Fe(CN) 6 ] -4 b) [Fe(CNS)] +2 c) [Fe(CNS) 2 ] + d) Fe 4 [Fe(CN) 6 ] 3

3 28. Which of the following is non essential amino acid? a) Leucine b) Lysine c) Phenylalanine d) Proline 29. Keratin is a) Simple protein b) Conjugated protein c) derived protein d) antibody 30. How many peptide linkages are present in a tetra peptide a) 1 b) 2 c) 3 d) Loss of biological activity by denaturation of protein is due to the a) Formation of amino acid b) Loss of primary structure c) Loss of both primary and secondary structure d) Loss of both secondary and tertiary structure 32. Which is fight and flight organ? a) Pituitary b) Thyroid c) Heart d) Kidney 33. Enzymes are made up of a) edible proteins b) proteins with specific structure c) carbohydrates d) carbohydrates containing nitrogen 34. Which of the following is not a protein? a) Wool b) Nail c) Hair d) Rayon 35. Which of the following is not the function of proteins? a) fight against the infection b) catalyze biological reactions in the body c) stimulation of physiological activity d) Transfer of genetic character from parents to offspring (children) 36. Insulin contains amino acids a) 51 b) 72 c) 86 d) Protein contains the main structural feature namely a) ester linkage b) ether linkage c) peptide linkage d) both b and c 38. Proteins are formed by the condensation of a) amino acids and glycerol b) α- amino acids c) β amino acids d) α- amino acids and β - amino acids alternately

4 39. Which one of the following tests cannot be used in testing proteins? a) Biuret test b) Ninhydrin test c) Mollisch s test d) Millon s test 40. An example of an acidic amino acid is a) Alanine b) lysine c) Phenylalanine d) aspartic acid 41. An example of an amino acid containing sulphur is a) lysine b) cysteine c) aspartic acid d) alanine 42. Proteins reacts with conc. HNO3 to produce a) a violet colour b) a red colour c) a yellow colour d) a blue colour 43. Insulin is a protein hormone which controls a) protein metabolism b) fat metabolism c) carbohydrate metabolism d) both a and b 44. Contraction of the muscles in the uterus during child birth is due to the action of a) adrenaline b) oxytocin c) insulin d) globulin 45. The enzyme not involved in protein hydrolysis is a) pepsin b) trypsin c) lipase d) erepsin 46. Haemoglobin is a) a simple protein b) a hormone protein c) a lipoprotein d) a chromoprotein 47. All amino acids give a purple colour when treated with a solution of a) starch b) neutral ferric chloride c) ninhydrin d) Fehling s solution 48. Insulin is secreted by the islets langerhans present in a) liver b) spleen c) pancreas d) deuodenum 49. Enzyme activity is dependent upon a) temperature b) ph of the medium c) concentration of the substrate d) all these 50. Haemoglobin is an iron containing a) hormone b) antibody c) vitamin d) conjugated protein 51. Zwitter ions are formed from a) carbohydrates b) conjugated proteins c) α-amino acids d) animal.fats 52. A biochemical messenger is called a) protein b) an amino acid c) a hormone d) an antibody 53. Oxytocin contains amino acids. a) 30 b) 20 c) 21 d) 8

5 54. A coenzyme is one which a) increases the activity of an enzyme b) is essential for the action of an enzyme c) is the prosthetic group of an enzyme which is a conjugated protein d) inhibits the activity of an enzyme 55. A protein present in blood is a) insulin b) collagen c) keratin d) fibrinogen 56. Nucleoprotein is an example for a) a derived protein b) a conjugated protein c) a hormone d) an enzyme 57. Oxytocin is secreted by a) pancreas b) prostrate gland c) pituitary gland d) liver 58. The molecular weight of protein is a) < 10,000 b) > 10, 000 c) < 5,000 d) Three different amino acid molecules condense to form number of tripeptides. a) 2 b) 3 c) 1 d) An example of a phosphoprotein is a) Myosin b) insulin c) oxytocin d) casein 61. Zwitter ions move in an acid medium towards a) anode b) cathode c) towards either of them d) towards none of them 62. Amino group of an amino acid reacts with nitrous acid, the compound formed is a) an alcohol b) an acid c) an aldehyde d) an ester 63. Decarboxylation of α-amino acids forms a) a hydrocarbon b) a primary amine c) an alcohol d) ketone 64. Antigens and also antibodies are a) lipids b) carbohydrates c) proteins d) α-amino acids 65. The hormones used by the athletes to increase the muscle strength is/are a) Estrogen b) Insulin c) Androgen d)both estrogen and androgen 66. The hormones which controls the process of burning of fats, proteins and carbohydrates to liberate energy in the body is a) Cortisone b) Adrenaline c) Thyroxin d) Insulin 67. Denaturation of proteins takes place in a) Mouth b)stomach c)large intestine d) Liver

6 68. Helical structure of proteins is stabilized by a) Peptide bond b) dipeptide bond c) hydrogen bond d) dipole- dipole forces 69. A compound gives both ninhydrin and Molisch s test. It is a) a Glycoprotein b) a carboxylic acid c) carbohydrates d) Haemoglobin 70. Which enzyme is not present in human system? a) pepsin b) lipase c) cellulase d) amylase

7 ANSWERS KEY TO CET 2011 QUESTOINS Q.No Answer Q.No Answer 1 c 36 a 2 c 37 c 3 a 38 b 4 c 39 c 5 c 40 d 6 b 41 b 7 d 42 c 8 c 43 c 9 a 44 b 10 b 45 c 11 a 46 d 12 b 47 c 13 b 48 c 14 c 49 d 15 c 50 d 16 d 51 c 17 a 52 c 18 a 53 d 19 b 54 c 20 c 55 d 21 b 56 b 22 a 57 c 23 b 58 b 24 a 59 d 25 b 60 d 26 c 61 b 27 b 62 a 28 d 63 b 29 a 64 c 30 c 65 d 31 d 66 d 32 b 67 b 33 b 68 c 34 d 69 a 35 d 70 c

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