1. Which of the following is most found in protein molecule?
a) Carbone
b) Hydrogen
c) Oxygen
d) Nitrogen
2. Number of naturally occurring amino acids is
a) 10
b) 20
c) 30
d) 40
3. All of the following are aliphatic amino acids except
a) Glycine
b) Alanine
c) Proline
d) Lysine
4. One of the following is neutral amino acid
a) Arginine
b) Lysine
c) Glutamine
d) Valine
5. All of the following are hydroxy containing amino acids except
a) Serine
b) Threonine
c) Valine
d) Tyrosine
6. All of the following are polar amino acids except
a) Serine
b) Glutamate
c) Arginine
d) Alanine
7. All of the following are essential amino acids except
a) Lysine
b) Aspartate
c) Tryptophan
d) Histidine
8. Example of basic essential amino acids
a) Arginine
b) Histidine
c) Lysine
d) All of the above
9. The peptide bond is
a) Covalent bond
b) Non-covalent bond
c) Responsible for secondary structure of protein d) Weak bond
10. Example of essential aromatic amino acids
a) Threonine
b) Alanine
c) Phenyl alanine
d) Glycine
11. The bonds present in the primary structure of protein are
a) Peptide bonds
b) Hydrogen bonds
c) Disulfide bonds
d) All of these
12. Cysteine, Cystine and methionine are
a) Essential amino acids
b) Present in protein structure
c) Acidic amino acids
d) All of these
13. Example of branched amino acid
a) Valine
b) Leucine
c) Isoleucine
d) All of the above
14. Example of hydroxy containing amino acids
a) Serine
b) Phenyl alanine
c) Tryptophan
d) Proline
15. Example of amino acids containing imino group
a) Glycine
b) Valine
c) Proline
d) Lysine
16. In proteins, the alpha-helix and Beta-pleated sheet are
examples of
a) Primary structure
b) Secondary structure
c) Tertiary structure
d) Quaternary structure
17. All amino adds are optically active except
a) Serine
b) Glycine
c) Tryptophan
d) Threonine
18. Which of the following amino acids possesses an imino group
a) Tryptophan
b) Threonine
c) Tyrosine
d) Proline
19. An amino acid which contains a disulphide bond is
a) Lysine
b) Methionine
c) Homocysteine
d) Cystine
20. Denaturation of proteins is often characterized by
a) Loss of biological activity
b) Always being irreversible
c) Being greater the lower the temperature
d) Changes in primary structure
21. Which of the following is not found in proteins
a) Citrulline
b) Arginine
c) Methionine
d) Cysteine
22. Aspartic acid is an
a) Monoamino dicarboxylic acid
b) Diamino monocarboxylic acid
c) Aromatic amino acid
d) Imino acid
23. All amino acids are optically active except
a) Glycine b) Serine
c) Threonine
d) Tryptophan
24. Lipids are
a) Structural constituents of cell membrane
b) Components having high energy value
c) Soluble in non-polar solvents
d) All of the above
25. An example for simple lipid is
a) Triglyceride (Triacylglycerol)
b) Cephalin
c) Fatty acids
d) Glycerol
26. Which one of the following is not a compound lipid?
a) Plasminogen
b) Waxes
c) Lecithin
d) Sphingomyelin
27. Cholesterol is an
a) Compound lipid
b) Simple lipid
c) Derived lipid
d) Aliphatic alcohol
28. The major storage lipid in adipose tissue is
a) Phospholipids
b) Cholesterol
c) Fatty acids
d) Triglycerides
29. Which substance yields more calories per gram on oxidation?
a) Fats
b) Carbohydrates
c) Plant proteins
d) Animal proteins
30. Neutral fats are:
a) Glycolipids
b) Phospholipids
c) Triglycerides
d) Waxes
31. Rancidity can be prevented by antioxidants like
a) Riboflavin
b) Vitamin E
c) Vitamin D
d) Vitamin B6
32. Which among the following is a saturated fatty acid
a) Stearic acid
b) Oleic acid
c) Linoleic acid
d) Aspartic acid
33. All the following are polyunsaturated fatty acids except
a) Linolenic acid
b) Palmitic acid
c) Arachidonic acid
d) Linoleic acid
34. The main lipid constituents of cell membrane are
a) Phospholipids
b) Cholesterol
c) Triacylglycerols
d) Glycolipids
35. All- the following compounds are formed from cholesterol except
a) Bile pigments
b) Vitamin D
c) Bile acids
d) Steroid hormones
36. Prostaglandins are synthesized from
a) Palmitic acid
b) Linoleic acid
c) Stearic acid
d) Arachidonic acid
37. The non-protein part of an enzyme is known as
a) Holoenzyme
b) Vitamin
c) Apoenzyme
d) Prosthetic group
38. The polypeptide or protein part of the enzyme is called
a) Apoenzyme
b) Holoenzyme
c) Prosthetic group
d) Zymogen
39. The general mechanism is that an enzyme acts by
a) reducing the energy of activation
b) increasing the energy of activation
c) decreasing the pH
d) increasing the pH
40. The coenzyme is
a) often a metal
b) always a protein
c) often a vitamin
d) always an inorganic compound
41. Which of the following is produced with the combination of
apoenzyme and coenzyme
a) Holoenzyme
b) Enzyme substrate complex
c) Prosthetic group
d) Enzyme product complex
42. Blocking of enzyme action by blocking its active sites is
a) allosteric inhibition
b) feedback inhibition
c) competitive inhibition
d) non-competitive inhibition
43. Enzymes are basically made up of
a) Fats
b) Proteins
c) Nucleic acids
d) Vitamins
44. Enzymes are polymers of
a) Hexose sugar
b) Amino acids
c) Fatty acids
d) Inorganic phosphate
45. The enzyme which hydrolyses starch to maltose is
a) protease
b) amylase
c) lactase
d) maltase
46. Value needed for enzyme action is
a) Low Km
b) Low Ki
c) High Km
d) High Ki
47. Km value of enzyme is
substrate concentration at
a) 1/2 V max
b) 2 V max
c) 1/4 V max
d) 4 V max
48. Most of the members of
vitamin B complex act as
a) Cofactor
b) Coenzyme
c) Prosthetic group
d) Apoenzyme
49. Which one of the following statements is true with reference to
enzymes?
a) Apoenzyme = Holoenzyme + Coenzyme
b) Holoenzyme = Apoenzyme + Coenzyme
c) Coenzyme = Apoenzyme + Holoenzyme
d) Holoenzyme = Coenzyme – Apoenzyme
50. All the following are monosaccharides except
a) Ribose
b) Glucose
c) Maltose
d) Mannose
51. Lactose contains
a) Glucose and glucose
b) Glucose and galactose
c) Glucose and fructose
d) Galactose and fructose
52. Sucrose is known as
a) Table sugar
b) Milk sugar
c) Malt sugar
d) Fruit sugar
53. An enzyme is a specialized
a) Lipid that speeds up reactions
b) Disaccharide that speeds up reactions
c) Protein that speeds up reactions
d) Lipid used to slow down bimolecular reactions
54. The catalytic activity of an enzyme is restricted to its small
portion called
a) Active site
b) Passive site
c) Allosteric site
d) All Choices are correct
55. An activated enzyme made of polypeptide chain and a co-factor
is
a) Coenzyme
b) Substrate
c) Apoenzyme
d) Holoenzyme
56. The enzyme minus its coenzyme is referred to as the
a) Iso-enzyme
b) Metalloenzyme
c) Apoenzyme
d) All of these
57. An inhibitor that changes the overall shape and chemistry of an
enzyme is known as
a) Auto-steric inhibitor
b) Competitive inhibitor
c) Steric inhibitor
d) Noncompetitive inhibitor
58. An enzyme is generally named by adding to the end of the name
of the
a) "ase" coenzyme
b) "ase"cell in which it is found
c) "ose" substrate
d) "ase" substrate
59. They are non-protein organic molecules bound to enzymes near
the active site
a) Activators
b) Coenzymes
c) Holoenzymes
d) All of these
60. The first step in any reaction catalysed by an enzyme is the
formation of a specific association between the molecules called an
a) Enzyme-product complex
b) Enzyme-intermediate complex
c) Enzyme-substrate complex
d) None of these
61. The enzymes are classified into
a) Five groups
b) Three groups
c) Six groups
d) Four groups
62. In the Lock and Key model of enzyme action, the part of the
enzyme that recognizes the substrate is known as the
a) Enzyme-substrate complex
b) Product
c) Enzyme-product complex
d) Active site
63. All proteins contain the
a) Same 20 amino acids
b) Different amino acids
c) 300 Amino acids occurring in nature
d) Only a few amino acids
64. In proteins the alpha-helix and beta-pleated sheet are examples
of
a) Primary structure
b) Secondary structure
c) Tertiary structure
d) Quaternary structure
65. Bonds that are formed between two cysteine residues is
a) Disulphide
b) Peptide
c) Electrostatic
d) Hydrophobic
66. Which of the following amino acids is the smallest of all amino
acids
a) Alanine
b) Glycine
c) Valine
d) Serine
67. Which of the following is most found in protein molecule
a) Carbon
b) Sodium
c) Oxygen
d) Nitrogen
68. Which of the following amino acids side chains is a single
methyl group
a) Valine
b) Alanine
c) Leucine
d) lsoleucine
69. All of the following are polar amino acids except
a) Serine
b) Glutamate
c) Arginine
d) Alanine
70. Of amino acids abbreviated "Lys", "Glu",
"Trp", and "Gin", which is a basic amino acid with a
positive charge
a) Lysine
b) Tryptophan
c) Glutamic acid
d) Glutamine
71. All of the following are essential amino acids except
a) Lysine
b) Aspartate
c) Tryptophan
d) Histidine
72. Sulphur containing amino acid is
a) Methionine
b) Leucine
c) Valine
d) Asparagine
73. Which part of its chemical structure differentiates one amino
acid from another
a) Its side group
b) Its acid group
c) Its amino group
d) Its double bonds
74. Which one of the following is an acidic amino acid?
a) Palmitic acid
b) Aspartic acid
c) Pyruvic acid
d) Lysine
75. Branched chain amino acids are
a) Tyrosine, tryptophan and phenylalanine
b) Glycine, serine and threonine
c) Valine, leucine and isoleucine
d) Cystine, cysteine and methionine
76. H2N-CH2-COOH is the structure of
a) Glycine
b) Serine
c) Leucine
d) Threonine
77. Enzymes are
a) Biocatalysts
b) Proteins except ribozymes
c) Products of genes
d) All of the above
78. All of the following are hydroxy containing amino acids except
a) Serine
b) Threonine
c) Valine
d) Tyrosine
79. Primary structure of proteins refers to
a) Coiling and folding in form of specific structure
b) Number of amino acids in a chain
c) 30 structure
d) Alpha and Beta sheets
80. Substrate concentration which produces half maximal velocity
(1/2 Vmax)
a) Full Concentration
b) Null Concentration
c) Michael's Concentration
d) All of the above
81. The general formula of monosaccharides is
a) CnH2nOn
b) C2nH2On
c) CnH2O2n
d) CnH2nO2n
82. Two sugars which differ from one another only in configuration
around a single carbon atom are
termed
a) Epimers
b) Anomers
c) Optical isomers
d) Stereoisomers
83. The most important epimer of glucose is
a) Galactose
b) Fructose
c) Arabinose
d) Xylose
84. The sugar found in milk is
a) Galactose
b) Glucose
c) Fructose
d) Lactose
85. Invert sugar is hydrolytic products of
a) Lactose
b) Sucrose
c) Maltose
d) Fructose
86. Sucrose consists of
a) Glucose+ glucose
b) Glucose + fructose
c) Glucose+ galactose
d) Glucose+ mannose
87. A dissaccharide linked by alpha-1-4 Glycosideic linkages is
a) Lactose
b) Sucrose
c) Cellulose
d) Maltose
88. Starch is a
a) Polysaccharide
b) Monosaccharide
c) Disaccharide
d) None of these
89. Which of the following is an epimeric pair
a) Glucose and fructose
b) Glucose and galactose
c) Galactose and mannose
d) Lactose and maltose
90. Alpha-Glycosidic bond is present in
a) Lactose
b) Maltose
c) Sucrose
d) All of these
91. Cane sugar is known as
a) Galactose
b) Sucrose
c) Fructose
d) Maltose
92. Fructose is present in hydrolysate of
a) Sucrose
b) lnulin
c) Both of the above
d) None of these
93. Group of organic catalysts, protein in nature, present inside
the living cells
a) Enzymes
b) Catalysts
c) Hormones
d) None of the above
94. Galactose is present in the structure of
a) Sucrose
b) Lactose
c) Lecithin
d) Glycogen
95. A reducing disaccharide is
a) Glucose
b) Mannose
c) Maltose
d) Fructose
96. Glucose and mannose are epimers, this means that
a) They are mirror image to each other
b) One is aldose, the other is a ketose
c) They differ only in the configuration to one carbon
d) One is pyranose the other is furanose
97. Lactose is also called
a) Blood sugar
b) Invert sugar
c) Milk sugar
d) Animal starch
98. A disaccharide made up of two glucose units
a) Maltose
b) Sucrose
c) Dextrin
d) Lactose
99. All of the following are aliphatic amino acids except
a) Glycine
b) Alanine
c) Proline
d) Lysine
100. peptide bond is
a) Covalent bond
b) Non-covalent bond
c) Weak bond
d) Responsible for secondary structure of protein
101. A carbohydrate found in the DNA
a) Ribose
b) Ribulose
c) Deoxyribose
d) All of the above
102. The homopolysaccharide among the following is
a) Heparin
b) Hyaluronic acid
c) Dermatan sulphate
d) Cellulose
103. The heteropolysaccharide among the following is
a) Inulin
b) Starch
c) Heparin
d) Cellulose
104. Sugar present in DNA is
a) Ribose
b) Xylulose
c) Arabinose
d) Deoxyribose
105. Sugar present in RNA is
a) Ribose
b) Xylulose
c) Xylulose
d) Deoxyribose
106. Amylopectin differ from amaylose by
a) Alpha 1,4 glycosidic linkage
b) Beta 1,4 glycosidic linkage
c) Alpha 1,4 glycosidic linkage at branching
d) Alpha 1,6 glycosidic linkage at branching
107. One of the following polysaccharides is called animal starch
a) Glucose
b) Heparin
c) Dextrin
d) Glycogen
108. The major pathways for oxidation of glucose which are mainly
for energy production
a) Hexose monophosphate shunt (HMS)
b) Urea cycle
c) Glycolysis
d) Uronic acid pathway
109. The major site of storage of glucose as glycogen in the
a) Heart
b) Liver
c) Lung
d) kidney
110. Total ATP produced from complete oxidation of one molecule of
glucose during glycolysis
a) 8 ATP
b) 6 ATP
c) 24 ATP
d) 38 ATP
111. Gluconeogenesis is the process by which new glucose is
synthesized from
a) Carbohydrate
b) Noncarbohydrate
c) Protein
d) Lipid
112. Glycogenolysis is intracellular breakdown of glycogen to
a) Fructose
b) Maltose
c) Glucose
d) Sucrose
113. An enzyme is a specialized
a) Lipid that speeds up reactions
b) Disaccharide that speeds up reactions
c) Protein that speeds up reactions
d) Lipid used to slow down bimolecular reactions
114. The catalytic activity of an enzyme is restricted to its small
portion called
a) Active site
b) Passive site
c) Allosteric site
d) All Choices are correct
115. An activated enzyme made of polypeptide chain and a co-factor
is
a) Coenzyme
b) Substrate
c) Apoenzyme
d) Holoenzyme
116. The enzyme minus its coenzyme is referred to as the
a) Iso-enzyme
b) Metalloenzyme
c) Apoenzyme
d) All of these
117. An inhibitor that changes the overall shape and chemistry of
an enzyme is known as
a) Auto-steric inhibitor
b) Competitive inhibitor
c) Steric inhibitor
d) Noncompetitive inhibitor
118. An enzyme is generally named by adding to the end of the name
of the
a) "ase" coenzyme
b) "ase"cell in which it is found
c) "ose" substrate
d) "ase" substrate
119. They are non-protein organic molecules bound to enzymes near
the active site
a) Activators
b) Coenzymes
c) Holoenzymes
d) All of these
120. The first step in any reaction catalysed by an enzyme is the
formation of a specific association
between the molecules called an
a) Enzyme-product complex
b) Enzyme-intermediate complex
c) Enzyme-substrate complex
d) None of these
121. The enzymes are classified into
a) Five groups
b) Three groups
c) Six groups
d) Four groups
122. In the Lock and Key model of enzyme action, the part of the
enzyme that recognizes the substrate is known as the
a) Enzyme-substrate complex
b) Product
c) Enzyme-product complex
d) Active site
123. All proteins contain the
a) Same 20 amino acids
b) Different amino acids
c) 300 Amino acids occurring in nature
d) Only a few amino acids
124. In proteins the alpha-helix and beta-pleated sheet are
examples of
a) Primary structure
b) Secondary structure
c) Tertiary structure
d) Quaternary structure
125. Bonds that are formed between two cysteine residues is
a) Disulphide
b) Peptide
c) Electrostatic
d) Hydrophobic
126. Which of the following amino acids is the smallest of all amino
acids
a) Alanine
b) Glycine
c) Valine
d) Serine
127. Which of the following is most found in protein molecule
a) Carbon
b) Sodium
c) Oxygen
d) Nitrogen
128. Which of the following amino acids side chains is a single
methyl group
a) Valine
b) Alanine
c) Leucine
d) lsoleucine
129. All of the following are polar amino acids except
a) Serine
b) Glutamate
c) Arginine
d) Alanine
130. Of amino acids abbreviated "Lys", "Glu",
"Trp", and "Gln", which is a basic amino acid with a
positive charge
a) Lysine
b) Tryptophan
c) Glutamic acid
d) Glutamine
131. All of the following are essential amino acids except
a) Lysine
b) Aspartate
c) Tryptophan
d) Histidine
132. Sulphur containing amino acid is
a) Methionine
b) Leucine
c) Valine
d) Asparagine
133. Which part of its chemical structure differentiates one amino
acid from another
a) Its side group
b) Its acid group
c) Its amino group
d) Its double bonds
134. Which one of the following is an acidic amino acid?
a) Palmitic acid
b) Aspartic acid
c) Pyruvic acid
d) Lysine
135. Branched chain amino acids are
a) Tyrosine, tryptophan and phenylalanine
b) Glycine, serine and threonine
c) Valine, leucine and isoleucine
d) Cystine, cysteine and methionine
136. Peptide bond is
a) Covalent bond
b) Non-covalent bond
c) Weak bond
d) Responsible for secondary structure of protein
137. Enzymes are
a) Biocatalysts
b) Proteins except ribozymes
c) Products of genes
d) All of the above
138. All of the following are hydroxy containing amino acids except
a) Serine
b) Threonine
c) Valine
d) Tyrosine
139. Primary structure of proteins refers to
a) Coiling and folding in form of specific structure
b) Number of amino acids in a chain
c) 30 structure
d) Alpha and Beta sheets
140. All of the following are aliphatic amino acids except
a) Glycine
b) Alanine
c) Proline
d) Lysine
141. Amino acids are
a) Building blocks of carbohydrates
b) Building blocks of nucleic acids
c) Building blocks of lipids
d) Building blocks of proteins
142. Amino acids has
a) amino group only
b) both amino group and keto group
c) both amino group and carboxyl group
d) Carboxyl group only
143. The repeating units of proteins are
a) Glucose units
b) Amino acids
c) Fatty acids
d) Peptides
144. Amino acids are joined by
a) Hydrogen bond
b) Peptide bond
c) Ionic bond
d) Glycosidic bond
145. Haemoglobin has
a) primary structure
b) secondary structure
c) tertiary structure
d) quaternery structure
146. Tertiary structure is maintained by
a) peptide bond
b) hydrogen bond
c) disulpide bond
d) all of the above
147. Myoglobin is a
a) protein with primary structure
b) protein with secondary structure
c) protein with tertiary structure
d) protein with quaternery structure
148. An essential amino acid has one of the following characters
a) may be synthesized from metabolic intermediates as pyruvate
b) essential amino acids can be stored in liver
c) must be included in diet & can’not be formed in the body
d) tyrosine , leucine & serine are essential amino acids.
149. The type of bonds responsible for formation of β-pleated
sheets of protein is
a) hydrogen bonds between amino acids in a single polypeptide chain
b) disulphide bonds between two extended polypeptide chains
c) hydrogen bonds between two extended polypeptide chains
d) disulphide bonds between amino acids in a single polypeptide
chains.
150. Which of the following is non polar unchagerd non essential
amino acids
a) serine & valine
b) leucine & proline
c) leucine & glycine.
d) alanine & proline
151. Polar and Uncharged Amino Acids
a) serine & tyrosine
b) aspargine & glutamine
c) tyrosine & Threonine
d) All of the above
152. A disaccharide made up of two glucose units
a) maltose
b) sucrose
c) lactose
d) dextrin
153. The sugar found in DNA is
a) Ribose
b) Xylose
c) Ribulose
d) Deoxyribose
154. A branch component of starch is
a) Glucose
b) Amylopectin
c) Amylose
d) Maltose
155. The general formula of monosaccharides is
a) C2nH2On
b) CnH2O2n
c) CnH2nOn
d) CnH2nO2n
156. A carbohydrate found only in milk is
a) Maltose
b) Galactose
c) Lactose
d) Glucose
157. Sucrose consists of
a) Glucose + galactose
b) Glucose + glucose
c) Glucose + fructose
d) Glucose + mannose
158. An example of Hexose is
a) Ribose
b) Ribulose
c) Xylulose
d) Mannose
159. Galactose is present in the structure of
a) Lactose
b) Glycogen
c) Sucrose
d) Lecithin
160. Starch and glycogen are polymers of
a) Mannose
b) α−D-Glucose
c) Galactose
d) Fructose
161. Starch is a
a) Monosaccharide b) Polysaccharide
c) Disaccharide
d) None of these
162. Which of the following polysaccharides is not a polymer of
glucose
a) Amylose
b) Inulin
c) Amylopectin
d) Glycogen
163. An activated enzyme made of polypeptide chain and a co-factor
is
a) Apoenzyme
b) Holoenzyme
c) Coenzyme
d) Substrate
164. Enzymes are
a) Products of genes
b) Biocatalysts
c) Proteins except ribozymes
d) All of the above
165. An enzyme is a specialized
a) Disaccharide that speeds up reactions
b) Lipid used to slow down bimolecular reactions
c) Protein that speeds up reactions
d) Lipid that speeds up reactions
166. An enzyme is generally named by adding to the end of the name
of the
a) "ase" coenzyme
b) "ose" substrate
c) "ase" substrate
d) "ase"cell in which it is found
167. They are non-protein organic molecules bound to enzymes near
the active site
a) Activators
b) Holoenzymes
c) Coenzymes
d) All of these
168. The first step in any reaction catalysed by an enzyme is the
formation of a specific association between the molecules called an
a) Enzyme-substrate complex
b) Enzyme-intermediate complex
c) Enzyme-product complex
d) None of these
169. In the Lock and Key model of enzyme action, the part of the
enzyme that recognizes the substrate is known as the
a) Product
b) Enzyme-substrate complex
c) Enzyme-product complex
d) Active site
170. An inhibitor that changes the overall shape and chemistry of
an enzyme is known as
a) Steric inhibitor
b) Auto-steric inhibitor
c) Noncompetitive inhibitor
d) Competitive inhibitor
171. The enzymes are classified into
a) Four groups
b) Six groups
c) Five groups
d) Three groups
172. The catalytic activity of an enzyme is restricted to its small
portion called
a) Active site
b) Passive site
c) Allosteric site
d) All Choices are correct
173. The enzyme minus its coenzyme is referred to as the
a) Metalloenzyme
b) Apoenzyme
c) Iso-enzyme
d) All of these
174. Which of the following is most found in protein molecule
a) Hydrogen
b) Carbon
c) Oxygen
d) Nitrogen
175. Number of naturally occuring aminoacids is
a) 10
b) 20
c) 30
d) 40
176. All of the following are aliphatic amino acids except
a) Glycine
b) Alanine
c) Proline
d) Lysine
177. One of the following is neutral amino acid
a) Arginine
b) Lysine
c) Glutamine
d) Valine
178. All of the following are hydroxy containing amino acids except
a) Serine
b) Threonine
c) Valine
d) Tyrosine
179. One of the following is optically non active amino acid
a) Valine
b) Tyrosine
c) Glycine
d) Threonine
180. All of the following are polar amino acids except
a) Serine
b) Glutamate
c) Arginine
d) Alanine
181. All of the following are essential amino acids except
a) Lysine
b) Aspartate
c) Tryptophan
d) Hisitidine
182. All of the following are primary aminoacids except
a) Cysteine
b) Cystine
c) Alanine
d) Arginine
183. Type of bonds between C terminal and N terminal is
a) Covalent
b) Disulphide bond
c) Peptide
d) Both a and c
184. Type of bond between nitrogen and carbonyl group
a) Hydrogen bonds
b) Covalent bond
c) Peptide bond
d) Disulphide bond
185. Primary structure of proteins refers to
a) Coiling and folding in form of specific structure
b) Number of amino acids in a chain
c) 3D structure
d) Alpha and Beta sheets
186. Which of the following is the correct matching of base pairs
in DNA
a) Adenine–Guanine and Thymine–Uracil b) Guanine–Cytosine and
Adenine–Uracil
c) Adenine–Thymine and Guanine–Cytosine
d) Guanine–Thymine and Adenine–Cytosine
187. DNA replication involves the breaking of bonds between
a) Bases
b) sugars and bases
c) phosphates and bases
d) sugars and phosphates
188. Two sugars found in nucleic acids are
a) sucrose and ribose
b) glucose and fructose
c) deoxyribose and ribose
d) deoxyribose and glucose
189. The base found in RNA nucleotides but not in DNA nucleotides
is
a) uracil (U).
b) adenine (A)
c) guanine (G).
d) cytosine (C).
190. If the code for an amino acid is AGC on the DNA molecule, the
anticodon on the tRNA would be
a) AGC
b) TGC
c) UCG
d) UGC
191. A nucleoside is composed of
a) a base+ a suger
b) a base+ a suger +phosphate
c) a base + a phosphate
d) none of these
192. A nucleotide is composed of
a) a base+ a suger
b) a base+ a suger +phosphate
c) a base + a phosphate
d) none of these
193. What are the repeating units of nucleic acids
a) nucleotides
b) phosphate molecules
c) bases
d) sugar molecules
---Key--Bio-L3----
1. (a)
2. (b)
3. (c)
4. (c)
5. (c)
6. (d)
7. (b)
8. (d)
9. (a)
10. (c)
11. (a)
12. (b)
13. (d)
14. (a)
15. (c)
16. (b)
17. (b)
18. (d)
19. (d)
20. (a)
21. (a)
22. (a)
23. (a)
24. (d)
25. (a)
26. (b)
27. (c)
28. (d)
29. (a)
30. (c)
31. (b)
32. (a)
33. (b)
34. (a)
35. (a)
36. (d)
37. (d)
38. (a)
39. (a)
40. (c)
41. (a)
42. (c)
43. (b)
44. (b)
45. (d)
46. (b)
47. (a)
48. (b)
49. (b)
50. (c)
51. (b)
52. (a)
53. (c)
54. (a)
55. (d)
56. (c)
57. (d)
58. (d)
59. (b)
60. (c)
61. (c)
62. (d)
63. (a)
64. (b)
65. (a)
66. (b)
67. (a)
68. (b)
69. (d)
70. (a)
71. (b)
72. (a)
73. (a)
74. (b)
75. (c)
76. (a)
77. (d)
78. (c)
79. (b)
80. (c)
81. (a)
82. (a)
83. (a)
84. (d)
85. (b)
86. (b)
87. (d)
88. (a)
89. (b)
90. (b)
91. (b)
92. (a)
93. (a)
94. (b)
95. (c)
96. (c)
97. (c)
98. (a)
99. (c)
100.(a)
101.(c)
102.(d)
103.(c)
104.(d)
105.(a)
106.(d)
107.(d)
108.(c)
109.(b)
110.(d)
111.(b)
112.(c)
113.(c)
114.(a)
115.(d)
116.(c)
117.(d)
118.(d)
119.(b)
120.(c)
121.(c)
122.(d)
123.(a)
124.(b)
125.(a)
126.(b)
127.(a)
128.(b)
129.(d)
130.(a)
131.(b)
132.(a)
133.(a)
134.(b)
135.(c)
136.(a)
137.(d)
138.(c)
139.(b)
140.(c)
141.(d)
142.(c)
143.(d)
144.(b)
145.(d)
146.(d)
147.(d)
148.(c)
149.(c)
150.(d)
151.(d)
152.(a)
153.(d)
154.(b)
155.(c)
156.(c)
157.(c)
158.(d)
159.(a)
160.(b)
161.(b)
162.(b)
163.(b)
164.(d)
165.(c)
166.(c)
167.(c)
168.(a)
169.(d)
170.(c)
171.(b)
172.(a)
173.(b)
174.(b)
175.(b)
176.(c)
177.(c)
178.(c)
179.(c)
180.(d)
181.(b)
182.(d)
183.(d)
184.(a)
185.(b)
186.(c)
187.(a)
188.(c)
189.(a)
190.(c)
191.(a)
192.(b)
193.(a)
اعلان هام للقراء والمشاهدين بالرجاء والسماح داخل البلوجر الخاص بي (ehab10f) الضغط بالماوس فقط علي أي اعلان داخل المدونة أو أي صفحة من صفحات الاعلان للأهمية في إستمرار البلوجر في الظهور في بداية صفحات البحث داخل بحث جوجل لزيادة أعداد المتابعين لها ورفع مستوي المدونة بين المدونات الاخري أرجو لا أحد ينسي ذلك ولكم جزيل الشكر وفائق الاحترام لجميع منسوبي المدونة.ولسهولة البحث في جوجل اكتب فقط ehab10f لتظهر المدونة في اول صفحات بحث جوجل فتظهر بهذا الاسم :ويمكن البحث داخل البلوجر عن أي موضوع تحتاج أو تهتم به ويكون مكتوب داخل البلوجر ehab10f خالص تحياتي لكم جميعا د/ ايهاب
