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2 amino acids mcq


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2 amino acids mcq

  1. 1. Amino Acids Quiz1. Which of the following is most 6. One of the following is optically found in protein molecule? non active amino acid a. Carbon a. Valine b. Hydrogen b. Tyrosine c. Oxygen c. Glycine d. Nitrogen d. Threonine2. No of naturally occuring 7. All of the following are polar aminoacids is : amino acids except: a. 10 a. Serine b. 20 b. Glutamate c. 30 c. Arginine d. 40 d. Alanine3. All of the following are aliphatic amino acids except : 8. All of the following are essential a. Glycine amino acids except : b. Alanine a. Lysine c. Proline b. Aspartate d. Lysine c. Tryptophan4. One of the following is neutral d. Hisitidine amino acid : 9. Lysine : a. Arginine a. Basic Only ketogenic b. Lysine b. Ketogenic glucogenic c. Glutamine c. Acidic glucogenic d. Valine d. Non essential5. All of the following are hydroxy containing amino acids except : 10. All of the following are primary a. Serine aminoacids except : b. Threonine a. Cysteine c. Valine b. Cystine c. d. Tyrosine Alanine d. Arginine DR.EHAB | Associate Prof. Dr of Biochemistry
  2. 2. 11. Which of the following is 17. Storage form of iron : precursor of T3 and T4 : a. Transferrin a. GABA b. Ferritin b. Dopa c. Myosin c. B- Alanine d. Actin d. Di-iodotyrosine 18. Which of the following protien is12. Zwitter ion are : found in bone : a. Basic a. Keratin b. Acidic b. Ossein c. Neutral c. Mucin d. Carry both -ve & +ve charges d. Actin e. Both c and d 19. Type of bonds between C terminal13. The unit of peptides is : and N terminal is : a. Moiety a. Covalent b. Residue b. Disulphide bond c. Polypeptide c. Peptide d. Both a and b d. Ionic14. Lactic acid is buffered by : e. Both a and c a. L.Carnosine 20. Type of bond between nitrogen b. Glutathione and carbonyl group : c. Casenogin a. Hydrogen bonds d. Dopa b. Covalent bond15. N terminal of glutathione is : c. Peptide bond a. Glycine d. Disulphide bond b. Cysteine 21. All of the following are non c. Glutamate covalent except : d. Aspartate a. Hydrophobic interactions16. Which of the following is BLOOD b. Disulphide bond iron carrier? c. Hydrogen bond a. Haemoglobin d. Electrostatic bond b. Albumin c. Transferrin d. Globulin DR.EHAB | Associate Prof. Dr of Biochemistry
  3. 3. 22. Primary structure of proteins refers to : 27. Casenogen is a. Coiling and folding in form of a. Chromoprotein specific structure b. Phosphoprotein b. Number of amino acids in a c. Glycoprotein chain d. Lipoprotein c. 3D structure 28. X-ray is a chemical agent for d. Alpha and Beta sheets protein denaturation23. Denaturation involves : a. True a. Peptide bonds b. False b. Primary structure of 29. Increase viscosity of proteins is protein due to c. Secondary structure a. Denaturation d. Function b. Isoelectric point e. Both c and d c. Both24. Tertiary structure of proteins d. None involves EXCEPT : 30. Separation of low molecular a. Domains weight protein from high one is : b. Globular a. Dialysis c. Fibrous b. Cromotography d. Beta sheets c. Electrophoiesis25. All of the following are simple d. Ultracentrifugation proteins except : 31. Example of basic essential a. Histones amino acids b. Albumin a. Arginine c. Keratins b. Histidine d. Glycoprotein c. Lysine26. Which of the following is sulphur d. All of the above highly containing protein : e. None of the above a. Collagen b. Keratin c. Ossein d. Reticulin DR.EHAB | Associate Prof. Dr of Biochemistry
  4. 4. 32. Example of non-protein amino 37. First order of protein structure acid refers to a. Glycine a. Bending of protein chain b. Alanine b. Number and sequence of c. Tryptophan amino acids d. All of the above c. Three dimensional structure of e. None of the above protein33. Example of non-protein amino d. Site of disulfide bonds acid e. Non-covalent bonds in protein a. Alanine molecule b. Citrulline 38. Second order of protein c. Phenylalanine structure refers to d. Leucine a. Number and sequence of34. Glutathione is an example for amino acids a. Amino acid b. Three dimensional structure of b. Dipeptide protein c. Polypeptide c. Proteins formed of more than d. Protein one monomer e. Tripeptide d. Bending of protein molecule35. The active group of e. Dependence on covalent bonds glutathione is 39. Third structure of protein a. Amino group structure refers to b. Sulfhydryl group a. Number and sequence of c. Carboxylic group amino acids d. Imino group b. Three dimensional structure of e. Peptide linkage protein36. The peptide bond is c. Proteins formed of more than a. Covalent bond one monomer b. Non-covalent bond d. Bending of protein molecule c. Weak bond e. Dependence on covalent bonds d. Responsible for secondary structure of protein e. Between sulfhydryl groups DR.EHAB | Associate Prof. Dr of Biochemistry
  5. 5. 40. Fourth structure of protein d. A protein of low biological structure refers to value a. Proteins formed of more than e. Poor in essential amino acids one monomer 45. Globulin is b. Myoglobin is an example. a. A basic protein c. Depends on covalent bonds b. A protein of low molecular d. None of the above weight e. All of the above c. Heat coagulable protein41. Covalent bond is d. Easily soluble in water a. A weak bond e. A fibrous protein b. A true chemical bond 46. Keratin is c. A hydrogen bond a. Protein of tendons d. Responsible for secondary b. Rich in sulfur structure of protein c. Poor in cysteine e. Liable to be destroyed d. Conjugated protein42. Example of essential aromatic e. Soluble in water amino acids 47. Collagen contains high a. Threonine percentage of b. Alanine a. Glycine c. Phenyl alanine b. Tryptophan d. Glycine c. Phenyl alanine e. Cysteine d. Serine43. Protein of high biological value e. Valine a. Contains essential amino acids 48. Caseinogen is a. b. Is poor in essential amino acids Simple protein c. Is of plant source b. Derived protein d. Contains amino acid glycine c. Phosphoprotein e. Is a basic protein d. Rich in sulfur containing44. Albumin is amino acids a. Insoluble in water e. Presentin plasma b. Heat coagulable protein c. A plant protein DR.EHAB | Associate Prof. Dr of Biochemistry
  6. 6. 49. On electrophoresis for plasma d. Alcohol precipitation proteins using buffer of pH 8.6 53. Example of essential sulphur a. The proteins are neutral containing amino acids b. The proteins carry negative a. Lysine charge b. Cysteine c. The proteins carry positive c. Cystine charge d. Alanine d. The proteins are easily e. Methionine precipitated 54. The bonds present in the e. The proteins are denaturated primary structure of protein50. Albumins are separated by are a. 1/2 saturated ammonium a. Peptide bonds sulfate b. Hydrogen bonds b. Full saturated ammonium c. Disulfide bonds sulfate d. All of these c. 20% saturated ammonium 55. A protein rich in proline and sulfate hydroxy proline is d. 60% saturated ammonium a. Globin sulfate b. Collagen e. 10% saturated ammonium c. Casein sulfate d. Histone51. Albumins and globulins are 56. The buffering property of defined as: proteins is due to the presence a. Derived protein of b. Conjugated protein a. Acidic and basic groups c. Fibrous protein b. Hydrogen bonds d. Globular protein c. Indole groups e. Lipoprotein d. Hyrophobic bonds52. Plasma proteins are separated by a. Dialysis b. Electrophoresis c. Filtration DR.EHAB | Associate Prof. Dr of Biochemistry
  7. 7. 57. Arginine, lysine and ornithine 62. A protein that gives positive are biuret test is a. Obtained by hydrolysis of a. Albumin proteins b. Globulin b. Essential amino acids c. Casein c. Basic amino acids d. All of these d. Derived from butyric acid 63. A basic amino acid present in58. Glycine Is characterized by protein structure is a. Absence of an asymmeteric a. Histidine carbon b. Citruline b. Absence of optical activity c. Ornithine c. The shortest amino acid d. All of these d. All of these 64. Example of amino acid59. Ornithine is containing guanido group a. A basic amino acid a. Arginine b. An essential amino acid b. Lysine c. Present in protein structure c. Histidine d. All of these d. Valine60. Albumin, globulin and casein e. Leucine are 65. Keratin is a. Milk proteins a. A scleroprotein b. Plasma proteins b. Rich in cystine c. Egg proteins c. A simple protein d. Meat proteins d. All of these61. Cysteine, cystine and 66. A fibrous protein is methionine are a. Albumin a. Essential amino acids b. Myosin b. Present in protein structure c. Casein c. Acidic amino acids d. Globulin d. All of these DR.EHAB | Associate Prof. Dr of Biochemistry
  8. 8. 67. Glycine is 72. Example of branched amino a. A non-optically active amino acid acid a. Valine b. Present in structure of b. Leucine glutathione c. Isoleucine c. A neutral amino acid d. All of the above d. All of these e. None of the above68. Proteins associated with 73. Example of hydroxy nucleic acid in nucleo-protein containing amino acids are a. Serine a. Albumin b. Phenyl alanine b. Globulin c. Tryptophan c. Keratin d. Proline d. Histones e. Glutamic acid69. ln proteins, the alpha-helix 74. Example of amino acids and Beta-pleated sheet are containing imino group examples of a. Glycine a. Primary structure b. Valine b. Secondary structure c. Proline c. Tertiary structure d. Lysine d. Quaternary structure e. Phenyl alanine70. A tetra peptide contains the 75. Example of an amino acid following number of preptide containing sulfhydryl group bonds a. Alanine a. Two b. Cysteine b. Three c. Proline c. Four d. Tryptophan d. Five e. Lysine71. A globular protein is a. Actin b. Myosin c. Collagen d. Albumin DR.EHAB | Associate Prof. Dr of Biochemistry
  9. 9. 76. Example of non-optically 80. All amino adds are optically active amino acid active except: a. Proline a. Serine b. Alanine b. Glycine c. Glycine c. Tryptophan d. Phenylalanine d. Threonine 77. Which of the following 81. Which of the following amino statements about amino acids acids possesses an imino is not true? group? a. Amino acids are ampholytes a. Tryptophan b. Aminoacids are linked through b. Hydroxylysine peptide bonds to form proteins c. Tyrosine c. Amino acids are not d. Proline Crystalline compounds 82. An amino acid which contains d. Leucine is a purely ketogenic a disulphide bond is: amino acid a. Lysine78. The amino acids found in b. Methionine biological proteins are of: c. Homocysteine a. D-Configuration and d. Cystine dextrorotatory 83. Chemically keratin is a: b. L-Configuration and a. Globulin levorotatory b. Fibrous protein c. D-Configuration and c. Tripeptide levo/dextrorotatory d. Conjugated protein d. L-Configuration and 84. The most abundant protein in dextro/laevoratatory the human body is:79. Which amino acid doesn’t a. Collagen occur in proteins of biological b. Keratin system? c. Myosin a. Ornithine d. Albumin b. Arginine c. Cystine d. Histidine DR.EHAB | Associate Prof. Dr of Biochemistry
  10. 10. 85. Denaturation of proteins is 90. With the exception of glycine, often characterised by: all amino acids found in a. Loss of biological activity proteins are: b. Always being irreversible a. Optically active c. Being greater the lower the b. Dextrorotatory temperature c. Of L-configuration d. Changes in primary structure d. Levorotatory86. Decarboxylation of amino 91. Essential amino acids are so acids will result in the named because: formation of: a. They are essential for life a. Amines process b. Imino acids b. Cannot be synthesized in the c. Basic amino acids body d. Amides c. Deficiency leads to genetic87. The number of amino acid diseases residues in one spiral of alpha- d. Important in cell growth helix of proteins is usually: 92. Casein is a: a. 2.6 a. Lipoprotein b. 3.6 b. Mucoprotein c. 4.6 c. Phosphoprotein d. 5.6 d. Chromoprotein88. Which of the following is not 93. Which is a basic amino acid? found in proteins? a. Lysine a. Citrulline b. Tyrosine b. Arginine c. Glycine c. Methionine d. Leucine d. Cysteine 94. An amino acid containing89. The only amino acid imidazole group ls: containing indole ring is: a. lsoleucine a. Tryptophan b. Arginine b. Tyrosine c. Proline c. Histidine d. Histidine d. Phenylalanine DR.EHAB | Associate Prof. Dr of Biochemistry
  11. 11. 95. The major linkage between amino acids in protein is the: a. Hydrogen bond b. Ionic bond c. Sulphide bond d. Peptide bond 96. An example of a chromoprotein is: a. Casein b. Hemoglobin c. Peptone d. Collagen 97. When a peptide bond is formed there is removal of : a. CO2 b. H2O c. NH3 d. H+ 98. Aspartic acid is a (an): a. Monoamino dicarboxylic acid b. Diamino monocarboxylic acid c. Aromatic amino acid d. Imino acid 99. All amino acids are optically active except: a. Glycine b. Serine c. Threonine d. Tryptophan100. Amino acid which synthesizes many hormones is: a. Valine b. Phenylalanine c. Alanine d. Histidine DR.EHAB | Associate Prof. Dr of Biochemistry
  12. 12. Answers1. A 26. B 51. D 76. D2. B 27. B 52. B 77. C3. C 28. B 53. E 78. D4. C 29. A 54. A 79. A5. C 30. A 55. B 80. B6. C 31. D 56. A 81. D7. D 32. E 57. C 82. D8. B 33. B 58. D 83. B9. B 34. E 59. A 84. A10. B 35. B 60. A 85. A11. D 36. A 61. B 86. A12. D 37. B 62. D 87. B13. D 38. D 63. A 88. A14. A 39. B 64. A 89. A15. C 40. A 65. D 90. A16. C 41. B 66. B 91. B17. B 42. C 67. D 92. C18. B 43. A 68. D 93. A19. E 44. B 69. B 94. D20. A 45. C 70. B 95. D21. B 46. B 71. D 96. B22. B 47. A 72. D 97. B23. E 48. C 73. A 98. A24. D 49. B 74. C 99. A25. D 50. B 75. B 100.b DR.EHAB | Associate Prof. Dr of Biochemistry