Medical PG Biochemistry
1. Structural proteins are
(A) Fibrous
(B) Globular
(C) Branched
(D) Compound
2. The Tertiary structure of protein is most commonly detected by
(A) X-ray crystallography
(B) Spectrophotometry
(C) Electrophoresis
(D) Chromatography
3. Flexibility of protein depends on
(A) Glycine
(B) Tryptophan
(C) Phenylalanine
(D) Histidine
4. Catabolism of H2O2 is carried out by
(A) Peroxisomes
(B) Mitochondria
(C) Endoplasmic reticulum
(D) Lysosomes
5. Hydroxyethyl starch is a
(A) Vasodilator
(B) Inotrope
(C) Plasma expander
(D) Diuretic
6. Function of Metabolism includes all except
(A) Extraction of nutrients from food
(B) Breakdown of substrate
(C) Equilibrium of biochemical with intracellular components
(D) Using building blocks for synthesis
7. Which biochemical reaction does not occur in the mitochondria
(A) Kreb’s cycle
(B) Urea cycle
(C) Gluconeogenesis
(D) Fatty acid synthesis
8. Energy source used by brain in later days of Starvation is
(A) Glucose
(B) Ketone bodies
(C) Glycogen
(D) Fatty acids
9. In collagen synthesis, hydroxylation of Proline to Hydroxyproline requires allexcept
(A) Pyridoxal phosphate
(B) Vitamin C
(C) Oxygen
(D) Di-oxygenase
10. Which of the following is luminous
(A) Porphyrin
(B) Zymogen
(C) Chromatin
(D) Albumin
11. Which is not found in DNA
(A) Adenine
(B) Thymine
(C) Guanine
(D) Uracil
12. On complete hydrolysis of DNA, we will get all of the following except
(A) Adenosine
(B) Purine base
(C) Phosphoric acid
(D) Dexose pentose sugar
13. The vitamin used for post-translational modification of glutamic acid to γ Carboxyglutamate is
(A) Vitamin D
(B) Vitamin E
(C) Vitamin A
(D) Vitamin K
14. Bile acids are derived from
(A) Fatty acids
(B) Cholesterol
(C) Bilirubin
(D) Proteins
15. Aneuploidy is due to
(A) Non-disjunction at meiosis
(B) Mosaicism
(C) Deletion
(D) Translocation
16. Alkaline phosphatase is produced by
(A) Liver
(B) Bone
(C) Placenta
(D) All of the above
17. A marker of Golgi apparatus is
(A) Galactosyl transferase
(B) Acetyl CoA synthetase
(C) Pyruvate kinase
(D) Malonyl CoA
18. In haemoglobin, iron is bound to
(A) Histidine
(B) Leucine
(C) Isoleucine
(D) Valine
19. Fluoride inhibits which enzyme
(A) Pyruvate kinase
(B) Succinyl dehydrogenase
(C) Enolase
(D) Aldolase
20. Metabolites in HMP shunt are all except
(A) Glycerol-3 phosphate
(B) Sedoheptulose-7 phosphate
(C) Glyceraldehyde-3 phosphate
(D) Xyluose-5 phosphate
21. NADPH is used in
(A) Fatty acid synthesis
(B) Ketone synthesis
(C) Gluconeogenesis
(D) Glycolysis
22. The most essential fatty acid is
(A) Linoleic acid
(B) Linolenic acid
(C) Arachidonic acid
(D) Palmitic acid
23. Rate limiting enzyme in the synthesis of cholesterol is
(A) HmG CoA reductase
(B) HmG CoA synthetase
(C) Acetyl CoA synthetase
(D) Acetyl CoA carboxylase
24. If starvation exceeds 7 days, the major nutritional supply of the brain comes from
(A) Fatty acids
(B) Ketone bodies
(C) Protein breakdown
(D) Carbohydrate breakdown
25. Thiamine is essential for
(A) Isocitrate dehydrogenase
(B) Succinate dehydrogenase
(C) Pyruvate dehydrogenase
(D) Acetyl CoA synthetase
26. Which vitamin is necessary for coenzyme A synthesis
(A) Pantothenic acid
(B) Ascorbic acid
(C) Biotin
(D) Pyridoxine
27. Cobalt forms a component of which vitamin
(A) Biotin
(B) Vitamin B12
(C) Vitamin A
(D) Tocopherol
28. Cell shape and motility are provided by
(A) Microfilaments
(B) Microtubules
(C) Golgi apparatus
(D) Mitochondria
29. A protein estimation test is confused with
(A) Phosphates
(B) Nitrates
(C) Sulphates
(D) Bile salts
30. Furasol DA is:
(A) Free radical
(B) Artificial blood
(C) CO antagonist
(D) Used to increase O₂ delivery to tissue
31. Dietary fibre contains:
(A) Collagen
(B) Pectin
(C) Proteoglycans
(D) Starch
32. Biotins act on:
(A) Carboxylation
(B) Oxidative phosphorylation
(C) Oxidative deamination
(D) Transmethylation
33. Vitamin B12 is absorbed in the
(A) Stomach
(B) Duodenum
(C) Ileum
(D) Colon
34. Cofactor associated with the enzyme Glutathione peroxidase is
(A) Zinc
(B) Cadmium
(C) Molybdenum
(D) Selenium
35. Strongest bond amongst the following is
(A) Hydrophobic
(B) Electrostatic
(C) Hydrogen bond
(D) Wan der wall’s
36. Gluconeogenesis occurs in all except
(A) Glycerol
(B) Amino acid
(C) Lactic acid
(D) Palmitate
37. Apoprotein A is found in
(A) Chylomicrons
(B) VLDL
(C) HDL
(D) LDL
38. Amino acid which lacks chirality is:
(A) Lysine
(B) Leucine
(C) Histidine
(D) Glycine
39. An amino acid which does not participate by α helix formation is
(A) Leucine
(B) Glycine
(C) Proline
(D) Lysine
40. Trans-amination of pyruvate and glutamic acid leads to the formation of
(A) Oxaloacetate
(B) α-ketoglutarate
(C) Aspartate
(D) Malate
41. Which form of DNA is predominantly seen
(A) A
(B) C
(C) B
(D) Z
42. Thermo-stability in DNA is contributed mostly by
(A) A = T
(B) G ≡ C
(C) Molecular base
(D) Parallel arrangement
43. Okazaki fragment helps in
(A) DNA replication
(B) Translation
(C) Protein synthesis
(D) Transcription
44. Bromodeoxyuridine is related to DNA in
(A) Uracil
(B) Adenosine
(C) Cytosine
(D) Thymidine
45. The first step in fatty acid synthesis involves
(A) Acetyl CoA carboxylase
(B) β Hydroxyl CoA dehydrogenase
(C) Acetyl dehydrogenase
(D) Pyruvate kinase
46. Which of the following is denaturing substance?
(A) Gaanosine
(B) Guanidine
(C) Glutamate
(D) Glycine
47. Cyclic GMP act on
(A) Insulin
(B) Thyroxin
(C) Atrial natriuretic peptide
(D) Growth harmone
48. True statement regarding covalent bonds is :
(A) Electrons have same spin
(B) Electrons have opposite spin
(C) They are weak bonds
(D) None of the above
49. Vitamin required for post translational modification of coagulatants is :
(A) Vitamin A
(B) Vitamin C
(C) Vitamin B₆
(D) Vitamin K
50. Enzyme to both common in gluconegenesis and glycolysis pathway is :
(A) Phosphofructokinase
(B) Fructose 2, 6-biphosphatase
(C) Hexokinase
(D) Glucose 6 phosphatase
51. The major fate of glucose-6 Phosphate in tissue in a well fed state is :
(A) Hydrolysis to glucose
(B) Conversion to glycogen
(C) Isomerization to fructose 6 phosphate
(D) Conversion to ribulose 5 phosphate
52. Gluconeogensis affect A/E :
(A) Lactate
(B) Glycerol
(C) Alanine
(D) Growth hormone
53. Property of photochromosity is seen amongst the following amino acids :
(A) Unsaturated amino acid
(B) Aromatic amino acid
(C) Monocarboxylic acid
(D) Dicarboxylic acid
54. All of the following are required for hydroxylation of proline in collagen synthesis except :
(A) O₂
(B) Vitamin C
(C) Dioxygenases
(D) Pyridoxal phosphate
55. The cellular component for protein synthesis is :
(A) Smooth endoplasmic reticulum
(B) Rough endoplasmic reticulum
(C) Ribosomes
(D) Mitochondria
56. Binding of proteins to DNA is regulated by :
(A) Copper
(B) Zinc
(C) Selenium
(D) Nickle
57. hn RNA seen in :
(A) Spinal muscular dystrophy
(B) Sickle cell disease
(C) Hutchinson chorea
(D) α Thallasemia
58. Restriction endonuclease is :
(A) Break single stranded DNA
(B) Break double stranded DNA
(C) Break peptide chain
(D) Break RNA
59. The most important carrier of cholesterol in plasma is :
(A) Chylomicrons
(B) HDL
(C) VLDL
(D) LDL
60. Leucine is aminoacid with a :
(A) Nonpolar side chain
(B) Polar side chain
(C) Negatively charged side chain
(D) Positively charged side chain
61. Most basic amino acid out of the following is :
(A) Alanine
(B) Arginine
(C) Histidine
(D) Lysine
62. Transmination of pyruvate with glutamate produces :
(A) oxaloacetate & aspartate
(B) Alanine & asparate
(C) Oxaloacetate & α-ketoglutarate
(D) Alanine & α-ketoglutarate
63. Selenium is co-factor for :
(A) Glutathione peroxidase
(B) Glutathione reductase
(C) Glutathione synthetase
(D) Glutathione dehydrogenase
64. Mallate shuttle is seen to occur in :
(A) Glycolysis
(B) Glycogenolysis
(C) HMP shunt
(D) Gluconeogenesis
65. Glucose may be synthesized from :
(A) Glycerol
(B) Adenine
(C) Guanine
(D) Palmitic acid
66. NADPH is required for :
(A) Gluconeogenesis
(B) Glycolysis
(C) Fatty acids synthesis
(D) Glycogenolysis
67. If chymotrypsin molecule undergoes a ser-195-ala mutation then :
(A) Chymotrypsin will not bind the substrate
(B) Chymotrypsin will bind the substrate as well as cause cleavage
(C) Chymotrypsin will bind the substrate but will not cause cleavage
(D) No affect will be observed
68. Apoprotein A is found in :
(A) Chylomicrons
(B) VLDL
(C) HDL
(D) LDL
69. Endogenous triglycerides in plasma are maximally carried in :
(A) VLDL
(B) Chylomicrons
(C) LDL
(D) HDL
70. All of the following statements are correct about metabolism in brain except :
(A) Fatty acids are utilized in starvation
(B) 60% of total energy is utilized during resting stage
(C) Ketone bodes are used in starvation
(D) Has no stored energy
71. Which enzyme involved in translation is often referred to as ‘Fidelity enzyme’ :
(A) DNA polymerase
(B) RNA polymerase
(C) Amino acyl-t RNA synthetase
(D) Amino acyl-reductase
72. Okazaki segments are required for :
(A) DNA synthesis
(B) RNA synthesis
(C) Protein synthesis
(D) None of the above
73. DNA restriction is done by the following method :
(A) Paper chromatography
(B) Electrophoresis agargel method
(C) Spectrophotometer
(D) Spectrometry
74. Strongest bond out of the following is :
(A) Electrostatitc
(B) Hydrogen
(C) Hydrophobic
(D) Vanderwall’s
75. Which of the following molecular phenomenon in Ig genes is responsible for affinity maturation of antibody response :
(A) Chain shuffling
(B) Junctional diverity
(C) somatic hypermutation
(D) Altered RAA splicing
76. Optically inactive Amino Acid is
(A) Proline
(B) Glycine
(C) Lysine
(D) Leucine
77. True statement regarding Nitric oxide is :
(A) NO is synthesized from arginine
(B) NO is spontaneous produced from NO₂
(C) NO causes vasoconstriction
(D) NO is released from mitochondria
78. Thiamine acts as a cofactor in :
(A) Conversion of pyruvate to acetyl-CoA
(B) Transamination reactions
(C) Oxidation in respiratory chain
(D) Conversion of pyridoxal to pyridoxal phosphate
79. Following constitute dietry fibres except :
(A) Pectin
(B) Cellulose
(C) Hemicellulose
(D) Riboflavin
80. Which of the following aminoacid is excreated in urine in maple syrup urine disease :
(A) Tryptophan
(B) Phenylalanine
(C) Leucine
(D) Arginine
81. Ammonia is detoxified in brain to :
(A) Urea
(B) Glutamine
(C) GABA
(D) Uric acid
82. Gaucher’s disease is due to deficiency of enzyme :
(A) Sphingomyelinase
(B) β Glucosidase
(C) Hexosaminidase-A
(D) β Galactosidase
83. Glucose can be synthesized from all of the following except :
(A) Acetoacetate
(B) Lactic Acid
(C) Glycerol
(D) Amino acid
84. True about polymerase chain reaction is :
(A) Enzymatic DNA amplification
(B) Recombinent DNA amplification
(C) Seperation of protein fragments is serum
(D) None
85. Translation occurs in :
(A) Ribosomes
(B) Mitochondria
(C) Nucleus
(D) Cytoplasm
86. Gout is disorder of :
(A) Purine metabolism
(B) Pyrimidine metabolism
(C) Oxalate metabolism
(D) Protein metabolism
87. Best enzyme marker for chronic alcoholism is :
(A) Gamma glutamyl-transferase
(B) SGOT
(C) SGPT
(D) Aldolase
88. In cytochrom P-450, P stands for :
(A) Structural protein
(B) Polymer
(C) Substrate protein
(D) Pigment
89. Dietery cholesterol is delivered transported to extra hepatic tissue by :
(A) VLDL
(B) LDL
(C) Chylomicrons
(D) IDL
90. Molecular separation of two proteins with same charge can be done by:
(A) Ion exchange chromatography
(B) Dialysis
(C) Gel diffusion chromatography
(D) Electrophoresis
91. In Metabolic alkalosis, which is true about excretion in urine :
(A) More of NH₃
(B) Less of aceto acetic acid
(C) Betahydroxy butyric acid
(D) Less ammonia
92. In starvation, nitrogen is carried from muscle to liver and kidney by:
(A) Alanine
(B) Aspartic acid and Serine
(C) Glycine
(D) Asparagine
93. Ketone body formation without glycosuria seen in
(A) DM
(B) DI
(C) Prolonged starvation
(D) Obesity
94. Bile Salts undergo xenobiotics
(A) After conjugation with taurine and glycine
(B) After conjugation with lysine
(C) After conjugation with betaglucuronic acid
(D) After conjugation with derived proteins
95. After conjugation with derived proteins
(A) Conjugated proteins
(B) Simple globular proteins
(C) Unconjugated proteins
(D) Derived proteins
96. About oxidative phophorylation true is
(A) Generation of ATP’s
(B) Generation of ADP’s
(C) Utilization of ATP’s
(D) Utilization of NADP
97. Pigment providing colour to stool is:
(A) Stercobilinogen
(B) Urobilinogen
(C) Mevobilirubin
(D) Bilirubin
98. Muscle cannot make use of glycogen for energy because of deficiency of
(A) Glucokinase
(B) Phosphoglucomutase
(C) G-6-phosphatase
(D) Muscle phosphorylase
99. Acetyl CoA is necessary for:
(A) Aminoacid synthesis
(B) Fatty acid synthesis
(C) Glucose storage
(D) All
100. Vitamin required for hydroxyproline to proline conversion :
(A) Vitamin C
(B) Vitamin E
(C) Pyridoxal PO₄
(D) Biotin
101. Ferric chloride test in PKU gives
(A) Red
(B) Green
(C) Blue
(D) Yellow
102. Mousy odour urine is seen in:
(A) Maple syrup urine
(B) Phenylketonuria
(C) Isovalericaciduria
(D) Cystinuria
103. Enzyme activity measured in beri beri is
(A) Transketolase
(B) Transaminase
(C) Decarboxylase
(D) Deaminases
104. Pompe’s disease is due to deficiency of which enzyme
(A) Branching enzyme
(B) Glucose 6 phosphatase
(C) Acid maltase deficiency
(D) Muscle phosphorylase
105. Muscles are not involved in which glycogen storage disease :
(A) I
(B) II
(C) III
(D) IV
106. Lipoprotein with scavenging action is
(A) HDL
(B) LDL
(C) VLDL
(D) None
107. Fructokinase is necessary for:
(A) Fructose -1-PO₄
(B) Ructose 1,6 diphosphate
(C) Fructose 6 phosphate
(D) Glyceraldehyde
108. Cholesterol structurally belongs to molecules:
(A) Steroid
(B) Carbohydrate
(C) Urea
(D) Peptide
109. Lesch Nyhan syndrome is due to deficiency of :
(A) Hypoxanthine phosphoribosyl transferase
(B) Xanthine oxidase
(C) Purine phosphorylase
(D) Adenosine deaminase
110. In cell membrance, following are true except:
(A) Lipids are regularly arranged
(B) Lipids are symmetrical
(C) Protein displaced laterally
(D) None
111. Intact peptide bond is necessary for which test :
(A) UV diffraction
(B) Ninhydrin
(C) Diazo reaction
(D) All
112. Addition of water in C-C bond is by the enzyme:
(A) Hydroxylase
(B) Dehydrogenase
(C) Hydrolase
(D) Hydratase
113. In TCA cycle, CO2 is released from :
(A) Thiokinase
(B) Isocitrate dehydrogenase
(C) Citrate dehydrogenase
(D) Alpha ketoglutrate
114. One of the following is having least density:
(A) Chylomicron
(B) HDL
(C) LDL
(D) VLDL
115. Succinyl Co-A is formed by :
(A) Histidine
(B) Leucine
(C) Valine
(D) Lysine
116. Haemoglobin unlike myoglobin shows :
(A) Parabolic curve of oxygen association
(B) Co-operative effect of combine O₂
(C) Cooperative index of 81
(D) Hill’s coefficient of 1
117. Km increased but Vmax same enzyme is:
(A) Competitive
(B) Non competitive
(C) Irreversible
(D) Uncompetitive
118. Familial hypercholesterolemia is :
(A) Deficient LDL receptors
(B) Deficient HDL receptors
(C) HMG CoA reductase deficiency
(D) Deficient VLDL receptors A
119. About glycolysis true is :
(A) Occurs in mitochondria
(B) Complete breakdown of glucose
(C) Conversion of glucose to 3C units
(D) 3 ATP’s are used in anaerobic pathway
120. Km value is defined as:
(A) Substrate concentration at Vmax/2
(B) Substrate concentration at twice Vmax
(C) Substrate concentration of thrice Vmax
(D) Substrate concentration of one third Vmax
121. Glutamine in blood acts as :
(A) NH₃ transporter
(B) Toxic element
(C) Stored energy
(D) Abnormal metabolite
122. In non competitive antagonism the true statement is :
(A) Km value decrease; V max normal
(B) Km value decreased; V max decreased
(C) Km value normal; V max decreased
(D) Km value decreased; V max increased
123. The enzyme deficient in erythropoietic porphyria is:
(A) PBG deaminase
(B) Uroporphyrin II cosynthetase
(C) Coprophyrin
(D) Ferrochelatase
124. Which among the following controls is an allosteric inhibitor of TCA cycle:
(A) Pyruvate dehydrogenase
(B) Keto glutarate dehydrogenase
(C) Isocitrate dehydrogenase
(D) Malate dehydrogenase
125. The best method to differentiate proteins is by :
(A) Gel chromatography
(B) Affinity chromatography
(C) Ion exchange electrophoresis
(D) None of the above
126. Among the following, the maximum redox potential is for :
(A) NADH/NAD
(B) Succinyl Co A fumarate
(C) Ubiquinone
(D) Fe 2⁺
127. HDN is seen due to deficiency of vitamin :
(A) A
(B) C
(C) K
(D) E
128. The enzyme deficient in Lesch-Nyhan syndrome is :
(A) GTRT
(B) Glutaminase
(C) Transcarboxylase
(D) HGPRT
129. The immediate precursor in the formation of acetoacetate from acetyl Co A in the liver is :
(A) Mevalonate
(B) HMG CoA
(C) Acetoacetyl CoA
(D) 3-hydroxy-butyryl
130. Of the following groups of amino acids produce common component of the TCA cycle is :
(A) Alaine, isoleucine, leucine, lysine
(B) Serine, asparagine, glycine, glutamate
(C) Isoleucine, valine, methionine
(D) Prolone, leucine, tryptophan
131. PCR in done for :
(A) DNA amplification
(B) RNA amplification
(C) Gene splicing
(D) Genecloning
132. Minimum fasting BGL for diagnosis of diabetes mellitus is :
(A) 114 mg/dl
(B) 120 mg/dl
(C) 126 mg/dl
(D) 132 mg/dl
133. G-6-P deficiency is seen in :
(A) Von gierke’s disease
(B) Taysach’s ds
(C) Pompe’s ds
(D) Andersons’s ds
134. Glycophorin is present in :
(A) Enterocyte
(B) Hepatocyte
(C) RBC
(D) Lymphocyte
135. NADPH is required in :
(A) Gluconeogenesis
(B) Glycolysis
(C) Glycogenolysis
(D) Fatty acid synthesis
136. Cystinuria is associated with excretion of which A.A in urine :
(A) Cystine, lysine, Tyrosine and alanine
(B) Cytstine, lysine, ornithine and alanine
(C) Cystine, ornithine, lysine and arginine
(D) Cystine, ornithine, leucine and arginine
137. In starvation, brain utilizes glucose preferentially but not in liver because :
(A) Low km value of hexokinase
(B) Low km glucokinase
(C) High km glucokinase
(D) High blood flow
138. Insulin acts on glucose metabolism by :
(A) ↑permeability of glucose across cell membrane
(B) ↑permeability across cells membrane against glucose gradient
(C) ↑permeability of renal cells
(D) ↑glucose transport to brain
139. All will predispose to atherosclerosis except :
(A) Homocystinemia
(B) Fibrinogen
(C) Calcium
(D) Lipoprotein A
140. Which is common metabolic process in human as well as bacteria :
(A) Purine synthesis
(B) Nitrogen fixation
(C) Mucolipid formation
(D) Nonoxidative photophosphorylation
141. Which of the following acts as cofactor after it’s modification :
(A) Vit-C
(B) Pantothenic acid
(C) Biotin
(D) Zinc
142. Which important component of cell wall has carbohydrate moiety :
(A) Phosphoglyceride
(B) Triacylglycerol
(C) Sphingomyelin
(D) GM₂ Gangliosides
143. Which of the following has highest electrophoretic mobility and least lipid content :
(A) Chylomicrons
(B) HDL
(C) LDL
(D) VLDL
144. Correct sequence of enzymes required for DNA formation is :
(A) DNA polymerase → Protein unwinding enzyme → DNA ligase → DNA Isomerase → Polymerase-1
(B) Protein unwinding enzyme → Polymerase-1 → DNA ligase → DNA Isomerase → DNA polymerase
(C) RNA polymerase → DNA polymerase III → DNA polymerase I → DNA ligase
(D) RNA polymerase → DNA Polymerase III → DNA ligase → Exonuclease → DNA polymerase I
145. True about enzyme specificity :
(A) Amount of enzyme required per second, per mole of product formation.
(B) Number of sites per substrate
(C) Amount of enzyme binding with various substrates
(D) Amount of enzyme causing transformation of 1 μmol of substrate per minute under standard conditions
146. Which is the smallest fundamental unit coding for DNA synthesis :
(A) Cistron
(B) Operon
(C) Replican
(D) Anticodon
147. Polypeptide chain termination is enhanced by :
(A) Stop codon
(B) promoter
(C) Ribosomal unit
(D) Peptidyl transferase
148. True about lipid bilayer of cell wall :
(A) Asymmetrical arrangement of cell wall component
(B) Lateral diffusion of ions
(C) Symmetrical arrangement of cell wall components
(D) Not made up of amphipathic lipids
149. An infant has hepatorenomegaly, hypoglycemia hyperlipidemia, aciodsis & normal structured glycogen deposition in liver. What is the diagnosis :
(A) Her’s disease
(B) Von Gerke’s ds
(C) Cori’s ds
(D) Anderson’s ds
150. Which of the following enzymes is/are involved in neoglucogenesis all except
(A) Phosphoglycerate kinase
(B) Fructose 1, 6-biphosphatase
(C) Phosphoglucomutase
(D) Pyruvate carboxylase
151. Energy required for maintainenace of bodily functions of a person weighing 40 kgs is :
(A) 1000 kilocalories
(B) 1500 kilocalories
(C) 2000 kilocalories
(D) 2500 kilocalories
152. Reducing sugar in urine is seen in :
(A) Fanconi anemia
(B) Lactose intolerance
(C) Galactosemia
(D) Phenylketonuria
153. Highest amount of cholesterol is present in :
(A) HDL
(B) LDL
(C) VLDL
(D) IDL
154. Hypolipidemic agents act on :
(A) HMG CoA synthetase
(B) HMG CoA oxygenase
(C) HMG CoA reductase
(D) HMG CoA hydratase
155. Cholesterol is transported to extrahepatic tissues by :
(A) IDL
(B) VLDL
(C) HDL
(D) LDL
156. The hydrolytic step leading to release of polypeptide chain from ribosomes is catalysed by :
(A) Stop codons
(B) Peptidyl transferase
(C) Release factors
(D) AUG codon
157. Substrate-level phosphorylation seen in reaction catalysed by :
(A) Succinate dehydrogenase
(B) Alfa-ketoglutarate dehydrogenase
(C) Succinyl CoA thiokinase
(D) Malate dehydrogenase
158. Conversion of glycine to serine requires :
(A) Folic acid
(B) Thiamine
(C) Vit. C
(D) Fe²⁺
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