2 amino acids mcq

Amino Acids Quiz

1. 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. Threonine
2. 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. Alanine
3. 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. Tryptophan
4. 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 essential
5. 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

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 is
12. 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 terminal
13. 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. Ionic
14. 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 bond
15. 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 interactions
16. 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


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 denaturation
23. 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. Both
24. 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. Electrophoiesis
25. 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. Lysine
26. 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


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 protein
33. 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 of
34. 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 molecule
35. 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 protein
36. 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


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 protein
41. 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 protein
42. 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. Serine
43. 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 containing
44. Albumin is amino acids
a. Insoluble in water e. Presentin plasma
b. Heat coagulable protein
c. A plant protein


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 protein
50. 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. Histone
51. 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 bonds
52. Plasma proteins are separated
by
a. Dialysis
b. Electrophoresis
c. Filtration


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 in
58. 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 acid
59. 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. Valine
60. 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 these
61. 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


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 above
68. 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 acid
69. 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 alanine
70. 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. Lysine
71. A globular protein is
a. Actin
b. Myosin
c. Collagen
d. Albumin


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. Lysine
78. 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


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. Levorotatory
86. 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 genetic
87. 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. Chromoprotein
88. 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 containing
89. 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


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. Tryptophan

100. Amino acid which synthesizes many hormones is:
a. Valine
b. Phenylalanine c. Alanine
d. Histidine


Answers
1. A 26. B 51. D 76. D
2. B 27. B 52. B 77. C
3. C 28. B 53. E 78. D
4. C 29. A 54. A 79. A
5. C 30. A 55. B 80. B
6. C 31. D 56. A 81. D
7. D 32. E 57. C 82. D
8. B 33. B 58. D 83. B
9. B 34. E 59. A 84. A
10. B 35. B 60. A 85. A
11. D 36. A 61. B 86. A
12. D 37. B 62. D 87. B
13. D 38. D 63. A 88. A
14. A 39. B 64. A 89. A
15. C 40. A 65. D 90. A
16. C 41. B 66. B 91. B
17. B 42. C 67. D 92. C
18. B 43. A 68. D 93. A
19. E 44. B 69. B 94. D
20. A 45. C 70. B 95. D
21. B 46. B 71. D 96. B
22. B 47. A 72. D 97. B
23. E 48. C 73. A 98. A
24. D 49. B 74. C 99. A
25. D 50. B 75. B 100.b


2 amino acids mcq

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