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1. The inhibition in a noncompetitive reaction: 19. An enzyme is a substance which

a. competes with the active site of the enzyme c. increases the rate of reaction a. convert heat to energy b. act as a catalyst c. change chemically in reaction
b. binds simultaneously with substrate other than the active site d. both b and c d. is not specific in reaction
2. The order and sequence of amino acid in a polypeptide determines what protein structure? 20. Milk curdling enzyme present in gastric juice of infants:
a. primary b. secondary c. tertiary d. quaternary a. pepsin b. rennin c. trypsin d. maltase
3. Amino acids that cannot be synthesized in the organism are called _____ 21. Carbohydrates are
a. non essential amino acids b. essential amino acids c. standard amino acids a. polyhydroxyaldehydes / polyhydroxyketones c. hemiacetals
d. alpha amino acids b. polyhydroxy acids d. polymers of amino acids
4. Which hormone regulates the level of blood sodium? 22. Insulin is usually classified as:
a. aldosterone b. sterol c. corticosteroid d. cortisone a. protein b. enzyme c. hormone d. carbohydrates
5. It is a precursor of vitamin A 23. What amount of glucose is present in the human blood?
a. B-carotene b. retinol c. retinal d. opium a. 60 to 90 mg in 100 ml blood c. 2% of the total human body weight
6. Which of the following is a precursor of vitamin D? b. 5 to 6 g in 100 ml blood d. none of these
a. prostaglandin b. linoleic acid c. cholesterol d. aldosterone 24. It is the organelle which serves as the site of the electron transport chain.
7. Which of these class enzymes introduces a double bond by the removal of hydrogen? a. mitochondria b. ribosome c. nucleus d. lysosome
a. dehydrogenase b. dehydrolase c. decarboxylase d. lipase 25. The end product of the hydrolysis of glycogen is:
8. The ionic property of amino acid is exhibited by its a. galactose b. fructose c. glucose d. arabinose
a. zwitterions form b. NH2 group c. COO group d. positively charged groups 26. Iodine test is a reaction which may be used to identify carbohydrates. The reaction is due to
9. All of the following are simple proteins except: a. presence of the free aldehyde group c. presence of amylose portion
a. glutelins b. globulins c. albumins d. glycoproteins b presence of alcohol group d. presence of glucose
10.The simplest monosaccharide is __________ 27. Benedict’s reagent yield positive result to:
a. erythrose b. starch c. glyceraldehydes d. arabinose a. monosaccharide only b. reducing sugars c. sucrose d. polysaccharides
11. Denaturation of protein is a result of: 28. Hypertonic solutions will cause the cell to:
a. cleavage of the peptide bond b. formation of H-bond c. breaking of H-bond a. swell b. shrink c. burst d. undergo hemolysis
d. none of these 29. Rancidity of fats maybe due to :
12. Competitive inhibition is a ______ reaction a. oxidation b. hydrogenation c. saponification d. condensation
a. reversible b. irreversible c. pH and temperature d. none of these 30. The deficiency of this hormone causes diabetes mellitus:
13. In the Seliwanioff’s test, the reaction of resorcinol and acid on the sugar forms a. progesterone b. testosterone c. insulin d. glucagons
a. hydroxymethyl furfural b. pyranose c. hydrazine d. purine 31. The active proteolytic enzyme in gastric juice is:
14. High concentration of neutral salts causes the precipitation of proteins. This is called _______ a. pepsin b. trypsin c. maltase d. catalase
a. salting out b. salting in c. coagulation d. both b and c 32. The site of oxidation reaction in electron transport chain is in the
15. The type of enzyme inhibition reaction whereby the inhibitor competes with the substrate at the a. nucleus b. mitochondrion c. ribosome d. golgi bodies
active site: 33. Protein digestion starts in the
a. competitive inhibition b. noncompetitive inhibition c. reversible inhibition a. mouth b. stomach c. intestine d. pancreas
d. incomplete inhibition 34. The conversion of an amino acid to sugar is:
16. The following are waxes except: a. gluconeogenesis b. glycolysis c. glycogenesis d. glycogenolysis
a. beeswax b. sperm oil c. bile acids d. lanolin 35. Which of the following is not an amino acid?
17. The inactive form of enzymes are called: a. leucine b. choline c. valine d. glycine
a. zymogens b. apoenzymes c. cofactor d. both b and c 36. The protein part of the enzyme molecule is the:
18. Which of the following amino acids has no alpha amino group? a. apoenzyme b. coenzyme c. cofactor d. holoenzyme
a. praline b. hydroxyproline c. glycine d. both a and b 37. Optimum temperature for enzyme activity in the body:
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a. 40oC b. 60oC c. 37oC d. 10oC a. energy requiring reaction b. energy producing reaction c. no energy is involved
38. Glucose is stored in the liver as: d. energy is absorbed
a. galactose b. glycogen c. lactose d. fructose 56. Which of the following is a characteristic of lipid?
39. The enzyme conformation adapts to the incoming substrate in a. zwitterions b. amphiphilic c. hydrophobic d. hydrophilic
a. Lock and Key theory b. Induced fit theory c. competitive inhibition 57. It is a condition that results when sugar level is below normal
d. noncompetitive inhibition a. hypoglycemia b. hyperglycemia c. ketonuria d. uremia
40. The process of converting glucose into glycogen is called: 58. An example of globular protein
a. gluconeogenesis b. glycogenesis c. glycolysis d. glycogenolysis a. albumin b. collagen c. fibrin d. silk
41. All are pyrimidine bases except: 59. Complementary base pairs in the DNA double helix are bonded by
a. guanine b. cytosine c. uracil d. thymine a. H-bond b. ester bond c. Van der Waals d. dipole- dipole
42. Glucose, amino acid and fatty acid enter the citric acid cycle by their conversion into: 60. Which nitrogen base is not found in DNA?
a. pyruvate b. acetyl CoA c. acetoacetyl CoA d. palmitic acid a. thymine b. cytosine c. uracil d. guanine
43. A hormone which stimulates glycogenesis: 61. An organic cofactor in an enzyme
a. insulin b. glucagons c. epinephrine d. vasopressin a. vitamins b. coenzymes c. a and b d. none of these
44. Chemicals extracted from organism such as bacteria and can inhibit growth or destroy other 62. At what stage of glucose oxidation is most of the energy produced?
microorganism: a. glycolysis b. aerobic stage c. glycogenesis d. glygenolysis
a. antibiotic b. enzyme c. hormone d. vitamins 63. The best known building blocks of RNA and DNA are:
45. The gland or tissue that regulates the blood glucose level: a. purines b. pyrimidines c. fatty acids d. a and b
a. parathyroid b. thyroid c. pancreas d. adrenal 64. It is responsible for the storage and transmission of genetic information
46. Which vitamin is formed in the body by exposure to ultraviolet irradiation or sunlight? a. adenine b. RNA c. DNA d. nucleic acid
a. vitamin A b. vitamin B c. Vitamin C d. vitamin 65. Build up of urea in the kidney is called
47. Excess vitamin A and D is stored in the body, but excess vitamin B and C is readily excreted. a. ketonuria b. glycemia c. uremia d. all of these
What property shows this? 66. The transfer of genetic information from DNA by the formation of mRNA
a. vit. C and B are water-soluble b. vit. A and D are fat –soluble c. both a and b a. transcription b. translation c. trans-amination d. replication
d. none of these 67. What is the end product of electron transport chain?
48. It is the entire genetic make up of an organism a. oxygen b. hydrogen c. carbon dioxide d. water
a. gene b. anticodon c. codon d. mutation 68. The energy producing reaction
49. The vitamin which is used in the prevention of degenerative changes in the central nervous a. metabolic b. catabolic c. anabolic d. all of these
system: 69. It is the molecule that directs the activity of the cells
a. vit. A b. vit. B complex c. vit. C d. vit. D a. DNA b. RNA c. nucleoproteins d. hormones
50. It is a model which best explains the enzyme-substrate action: 70. The sugar involved in DNA
a. lock and key b. molecular c. VSEPR d. Kreb a. ribose b. pentose c. deoxyribose d. xylose
51. The activation of pepsinogen requires: 71. The common metabolic pathway is
a. pepsin b. NaOH c. enterokinase d. HCl a. glycolysis b. beta oxidation c. Kreb’s cycle d. glucogenesis
52. DNA is primarily found in the 72. Rosenheim’s test is used to detect the presence of:
a. cytosol b. nucleus/mitochondria c. cell wall d. endoplasmic reticulum a. ethanolamine b. choline c. cholesterol d. glycone moiety
53. It is the enzyme which hydrolyzes starch to dextrin and maltose: 73. Detects the presence of alpha amino acids:
a. catalase b. amylase c. pepsin d. lactase a. Biuret b. Molisch c. Ninhydrin d. Hopkins-cole
54. A synthetic DNA is called
a. replicated DNA b. plasmid c. Gene d. recombinant DNA 74. The process of producing fats from acetyl Co-A is called:
55. Hydrolysis of ATP is an a. glycolysis b. lipogenesis c. glycogenolysis d. glucogenesis
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75. The following are test reagents to detect the presence of amino acids, except: 93. ID test to detect the presence of glycogen:
a. Grignard’s b. Xanthoproteic c. Millon-Nasse d. Sakaguchi a. phloroglucinol b. molisch c. iodine d. seliwanoff
76. The condition that lowers the pH of the blood due to starvation is called 94. The only sugar readily forms insoluble osazone crystals:
a. acidosis b. alkalosis c. hyperglycemia d. glycosuria a. lactose b. sucrose c. mannose d. sucrose
77. The substance responsible for the emulsion of fats is: 95. Important structural material found in the exoskeletons of many lower animals:
a. HCl b. bile acids c. pepsin d. trypsin a. chnondroitin b. heparin c. hyaluronic acid d. chitin
78. Hubl’s solution if used to ascertain degree of: 96. Hydrolysis of osazones produce:
a. saturation b. unsaturation c. peroxidation d. acidity a. phenylhydrazones b. ozones c. sugars d. none of the above
79. IUPAC name of acrolein: 97. General term for a group of polysaccharides present on the primary cell wall:
a. pentenal b. propenal c. hexanal d. acetone a. xanthan b. mucilage c. pectin d. carageenan
80. The positive indication for the presence of glycerol in acrolein test: 98. Specific test for galactose, due to the formation of highly insoluble crystals:
a. yellow colored solution c. silver mirror formed in the test tube a. phenylhydrazine test b. fermentation c. mucic acid d. molisch
b. black markings in filter paper d. play of colors from blue to shades of red 99. Type of RNA which serves as template for the amino acid sequence being synthesized:
81. Cerebrosides are positive in the following tests, except: a. mRNA b. tRNA c. rRnNA d. none of the above
a. Molisch b. Biuret c. Lassaigne’s d. none of the above 100. Positive indication for Anthrone test:
82. Osmic test is used to detect the presence of ____ in lipids: a. purple ring b. blue-green color c. effervescence d. yellow ppt
a. metals b. prostate groups c. unsaturated groups d. glycerol 101. Differentiating test between helical and linear polysaccharides:
83. The most sensitive chemical test to detect the presence of cholesterol: a. Molisch b. iodine c. Schweitzer d. fermentation
a. Liebermann-Burchard c. Formaldehyde-sulkfuric acid 102. The difference between Benedict’s and Barfoed’s test reagent lies in:
b. Salkowski reaction d. Colorimetric spectrophotometry a. sequestering agent used b. active component used c. pH of the solution
84. The following are phopholipids, except: d. alkali used
a. plasmalogen b. lecithin c. cephalin d. choline 103. Hydrolytic product of chitin:
85. A mixed triglyceride contains: a. iduronatet b. acetylgalactosamine c. acetylglucosamine d. glucuronic acid
a. three similar fatty acids esterified with glycerol c. three different fatty acids 104. Glucose and fructose are:
esterified with glycerol a. anomers b. epimers c. geometric isomers d. allosteres
b. two similar fatty acids esterified with glycerol d. all of the above choices 105. The complementary strand of CGACCTTGATCGACGTCGA:
86. The central compound found in the structure of sphingolipids: a. TCGTTCCAGCTAGTAACTAG c. AGCAAGGTCGATCATGATC
a. glycerol b. sphingosine c. ceramide d. phosphocholine b. GCTGGAACTAGCTGCAGCT d. ATCAAGGTCGATCATGATC
87. Lipid whose specific test is the Furter-Meyer test: 106. Alkaline bismuth reagent is used to detect the presence of:
a. tocopherol b. retinal c. sphingomyelin d. cerebroside a. polysaccharides b. disaccharides c. reducing sugars d. glycitols
88. Precipitate of _____ indicates the presence of phospholipids in the lipid sample: 107. Action of dilute alkali on sugars:
a. ammonium phosphomolybdate c. phosphorus triiodide a. dehydration b. hyperconjunction c. hydrolysis d. tautomerization
b. phosphorus periodate d. phospho-ammonium sulfate complex
89. The following are glycolipids, except: 108. The following are the components of DNA nucleosides, except:
a. globosides b. phosphatides c. gangliosides d. cerebrosides a. phosphoric acid b. sugar c. adenine d. cytosine
90. The parent compound of phospholipids: 109. Central dogma concept wherein the RNA molecule is used as template for the synthesis of
a. glycerol b. phosphatidic acid c. ethanolamine d. none of the above DNA molecule:
91. A non-pentose sugar which is also positive for Tollen’s phloroglucinol test: a. transcription b. translation c. mutation d. none of the above
a. galactose b. glucose c. fructose d. cellobiose 110. The following proteins are present in egg white, except:
92. The reagent present in Molisch test which is responsible for the dehydration reaction: a. ovomucin b. ovoglobulin c. albumin d. osseomucoid
a. sodium canbonate b. magnesiumstearate c. sulfuric acid d. NaOH 111. Anaerobic glycolysis occurs in the:
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a. nucleus b. mitochondria c. cytoplasm d. lysosomes a. xylose b. ribose c. arabinose d. threose

112. Ketogenic amino acids: 131. Which of the following is responsible for the transfer of genetic information?
a. leucine b. tyrosine c. phenylalamine d. all of the above a. ATP b. GTP c. DNA d. RNA
113. Osazone test is also known as: 132. Only form of inorganic nitrogen which can be utilized by living cells:
a. Nylander’s test b. Kowarsky test c. Trommer’s test d. Folin’s test a. urea b. ornithine c. ammonia d. nitrogen gas
114. Genetic defect characterized by mental retardation and cataract, since the unmetabolized 133. The following are essential amino acids, except:
sugar is toxic to the lens of the eyes: a. tyrosine b. lysine c. methionine d. arginine
a. galactosemia b. fructosemia c. pentosuria d. fructosuria 134. The chief end product of purine metabolism in man:
115. Body functions of lipids: a. CO b. urea c. uric acid d. ammonia
a. transformation into proteins and carbohydrates c. insulation and paddings for organs 135. The principal end product of protein metabolism:
b. catabolism to provide body with heat and energy d. all of the above a. carbon dioxide b. ammonia c. hippuric acid d. urea
116. Pyridoxine is a compound of this enzyme: 136. Presence of glucose in appreciable amounts in the urine:
a. enolase b. decarboxylase c. hydrogenase d. isomerase a. Hematuria b. glycosuria c. glycosemia d. albuminuria
117. The following are neutral amino acids, except: 137. The following are the tests for kidney efficiency, except:
a. methionine b. lysine c. threonine d. leucine a. phenylsulfophthelein test b. urea clearance test c. water output test
118. In man, the principal end product of protein metabolism is: d. crystallization method
a. uric acid b. lactic acid c. pyruvic acid d. urea 138. Growth hormone is also known as:
119. Condition wherein acetone accumulates in the blood: a. thyrotropic hormone b. somatotropin c. gonadotropin
a. ketosuria b. ketonemia c. ketosis d. ketonuria d. interstitial stimulating hormone
120. Glutamine is a _____ amino acid : 139. What is the anti-codon in tRNA that corresponds to the codon ACG in mRNA?
a. neutral b. basic c. acidic d. racemin a. UGC b. TGC c. GCA d. CGU
121. Oxidation product of ketone bodies: 140. Condition wherein bile pigment is present in excess in the blood:
a. reduced sugars b. carbon dioxide c. alcohols d. aldehydes a. jaundice b. hepatitis c. cirrhosis d. cystic fibrosis
122. Phosphoprotein found in egg yolk: 141. The following are non-essential amino acids, except:
a. ovocasein b. tendomucoid c. vitelin d. avidin a. glycine b. leucine c. cysteine d. glutamine
123. Amino acids positive for Sakaguchi reaction: 142. Principal digestive constituent of the gastric juice:
a. gelatin b. alanine c. arginine d. tyrosine a. trypsin b. pepsin c. gastrin d. enterokinase
124. Histidine is negative for: 143. Condition wherein the concentration of uric acid accumulates in blood reaches as high as 15
a. Pauly reaction b. Sodium Nitroprusside c. Ninhydrine d. Xanthoproteic mg. Percent:
125. An official simple protein obtained from corn: a. leukemia b. gout c. murexia d. any of the above
a. glutelion b. gliadin c. zein d. maize 144. The study of the composition and the chemical processes occurring in the living matter is:
126. Principle involved in the isolation of casein milk: a. qualitative chemistry c biochemistry e. inorganic chemistry
a. salting in b. salting out c. isoelectric precipitation d. none of the above b. organic chemistry d. quantitative chemistry
127. Process of converting liver glycogen into blood glucose: 145. What is wobble?
a. glycogenolysis b. gluconeogenesis c. glycolysis d. glycogenesis a. the ability of certain anticodons to pair with codons that differ at the third base
128. Genetic information is stored and carried in all cells by: b. an error in translation induced by streptomycin
a. single-stranded DNA c. double-stranded RNA c. a mechanism that allows for a peptide extension in the 50S sub-unit of the ribosome
b. double-stranded DNA d. single-stranded circular DNA d. thermal motions leading to local denaturation of the DNA double helix
129. Principal site for the synthesis of urea: 146. The most important function of HCl in the stomach is:
a. kidney b. liver c. spleen d. intestinal mucosa a. hydrolysis of protein c. activation of pepsinogen e. stimulation of pancreatic
130. Pentose present in gum Arabic: secretion
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b. neutralization of chyme d. destruction of bacteria 164. When starches are heated , they produce:
147. Transamination is: a. sugars b. glycogen c. dextrins d. disaccharides
a. conversion of amino acid to hydroxy acid c. conversion of amino acids to keto 165. Check the incorrect statement:
acids a. ribose is an aldopentose c. galactose is an aldohexose
b. loss of ammonia from amino acid d. formation of ammonium salt from b. maltose is a ketohexose d. glucose is an aldohexose
ammonia 166. The reducing property of sugars is due to this group:
148. The lipid that is converted to Vitamin D12 upon irradiation: a. aldehyde b. nitro c. carboxyl d. methyl
a. ergosterol b. glycerol c. cholesterol d. all of the above 167. The monosaccharide most rapidly absorbed from the small intestine is:
149. The metabolic degradation of hemoglobin takes place principally in: a. glucose b. fructose c. mannose d. galactose
a. the reticuloendothilial system c. the white blood cells 168. A condition known as atherosclerosis results as an accumulation in the blood vessels of
b. the red blood cells d. the liver cell a. calcium b. pathogens c. cholesterol d. ketones
150. The amino acid that is an important precursor of hemoglobin is: 169. Ketoses can be differentiated from aldoses by this test:
a. alanine b. proline c. glycine d. cysteine a. Molisch’s test b. Benedict’s test c. Seliwanoff’s test d. Tollen’s test
151. Serine is converted to ethanolamine by the removal of: 170. The clinical test for the determination of cholesterol:
a. oxygen b. ammonia c. carbon dioxide d. a carboxyl group a. Liebermann-Burchard b. Salkowski c. both a and b d. none of the above
152. Ninhydrin gives a blue coloration with: 171. Concentrated dehydrating acids change monosaccharides to:
a. proteins b. carbohydrates c. amino acids d. simple sugars a. simple sugars b. saccharic acids c. furfurals d. uronic acids e. aldaric acids
153. Which is the monomer unit of proteins? 172. A mucopolysaccharide which possesses an anticoagulant property:
a. amino acid b. monosaccharide c. fatty acid d. purine a. pectin b. hyaluronic acid c. heparin d. chitin e. chondroitin sulfate
154. The proteinase that is found mostly in gastric juice of young animals: 173. Which of the following is the test for reducing sugars for urine?
a. rennin c. steapsin e. none of the above a. Benedict’s test b. acrolein test c. Biuret test d. Brown Ring test
b. pepsin d. ptyalin 174. Lactose can be differentiated from fructose by:
155. Conjugated proteins which are a combination of amino acids and carbohydrates: a. Mucic acid test b. Barfoed’s test c. Fehling’s test d. Iodine test e. Tollen’s test
a. nucleoproteins b. glycoproteins c. phosphoproteins d. chromoproteins 175. Polymers that are responsible for the metabolic capabilities and morphology of organisms are:
156. Gamma decarboxylation of aspartic acid produces: a. carbohydrates b. proteins c. polysaccharides d. nucleic acid
a. alanine b. asparagines c. glutamic acid d. glycine 176. The product obtained from the partial hydrolysis of collagen:
157. Rotation of polarized light is caused by solutions of all of the following amino acids, except: a. myosin b. gelatin c. actin d. fibrinogen e. thrombin
a. alanine b. glycine c. leucine d. valine 177. The main carbohydrate of the blood is:
158. It is a disease due to protein deficiency: a. D-fructose b. D-glucose c. mannitol d. sorbitol
a. Kwashiorkor b. diabetes c. albuminuria d. jaundice 178. A normal value of glucose in the blood:
159. Which of the following amino acids is not essential in mammals? a. 100 to 200 mg% b. 80–120 mg% c. 50–75 mg% d. 200–300 mg%
a. phenylaline b. lysine c. tyrosine d. methionine 179. Butter becomes rancid upon exposure to air due to formation of:
160. The following are examples of chromopretien, except: a. acetic acid b. butyric acid c. formic acid d. propionic acid
a. chlorophyll b. hemoglobin c. cytochromes d. heparin 180. The cholesterol molecule is:
161. For the amino acid cysteine, choose the appropriate description of its side chain: a. an aromatic ring b. a straight chain acid c. a steroid d. A tocopherol
a. acidic b. basic c. aromatic d. sulfur-containing 181. Which of the following is a phospholipid?
162. Which of the following amino acids has a net positive charge at physiologic pH? a. glycogen b. prostaglandin c. sphingomyelin d. oleic acid
a. cysteine b. glutamic acid c. lysine d. valine 182. The passage of the end products of digestion from the small intestine into the blood stream:
163. Sickle cell anemia is the clinical manifestation of homozygous genes for an abnormal a. metabolism b. digestion c. absorption d. oxidation e. reduction
hemoglobin molecule. The mutational event responsible for the mutation in the beta chain is: 183. Endocrine gland that is a small oval body situated at the base of the brain:
a. crossing over b. insertion c. deletion d. point mutation a. hypophysis b. pancreas c. adrenal d. none of the above
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184. Cellular elements of the blood devoid of nucleus: 202. Which of the following is NOT an ID test for proteins and amino acids?
a. RBC b. WBC c. thrombocytes d. all of the above a. Ninhydrin b. Bial’s c. Biuret d. Xanthoproteic
185. Is the sum total of all activities directed towards the maintenance of life: 203. What vitamin deficiency causes pellagra?
a. catabolism b. anabolism c. metabolism d. photosynthesis e. fermentation a. riboflavin b. thiamin c. pantothenic acid d. nicotinic acid
186. This substance accumulates in the muscles as a result of vigorous exercise: 204. All are pyrimidine base, except:
a. muscle glycogen b. amino acids c. lactic acid d. glucose a. cytosine b. thymine c. uracil d. guanine
187. A common intermediate of metabolism of carbohydrates, fatty acids and amino acids is: 205. The sugar that yields only glucose when hydrolyzed is:
a. glycerol b. acetyl CoA c. acetoacetate d. oxaloacetate e. acetylcholine a. galactose b. maltose c. fructose d. sucrose
188. The principal site of glucose production in the human body is the : 206. Which is not a B-complex vitamin?
a. blood b. liver c. pituitary gland d. small intestine a. folic acid b. nicotinic acid c. riboflavin d. ascorbic acid
189. The major buffer of the extracellular fluid: 207. The following sugars are aldohexoses except:
a. bicarbonate-carbon dioxide b. amino acids c. phosphate d. none of the above a. fructose b. galactose c. glucose d. mannose
190. Separates from cells when blood is coagulated: 208. All the amino acid below contain sulfur, except:
a. fibrinogen b. plasma c. serum d. thrombin e. none of the above a. cystine b. methionine c. cysteine d. glycine
191. Glycolipids found in high concentrations in the brain and nerve cells especially in the myelin 209. The following are essential fatty acids, except:
sheath: a. oleic acid b. linoleic acid c. linolenic acid d. arachidonic acid
a. lecithin b. cephalins c. cerebrosides d. sphingolipids 210. This test detects the presence of two or more peptide bonds:
192. Alcohol in the body is : a. Ninhydrin b. Fehling’s c. Tollen’s d. Biuret
a. oxidized to CO2 and HOH c. excreted by kidneys 211. This vitamin easily undergoes oxidation:
b. excreted mainly by lungs d. excreted by large intestine a. vitamin A b. vitamin C c. vitamin B12 d. vitamin B1
193. Which of the following tissues contains the enzyme glucose-6-phosphatase and is able to 212. The end product of anaerobic glucose metabolism is:
supply glucose to the blood? a. pyruvate b. lactate c. carbon dioxide d. water
a. heart b. brain c. liver d. none of the above 213. The inactive form of an enzyme is sometimes called:
194. Complete digestion of all foodstuffs occurs in the : a. zymogen b. holoenzyme c. apoenzyme d. coenzyme
a. large intestine b. stomach c. mouth d. small intestine e. pancreas 214. Photosynthesis is a process involved in the manufacture of:
195. This compound is not a normal constituent of urine: a. carbohydrates b. fats c. proteins d. all of the above
a. sodium chloride b. albumin c. urea d. uric acid 215. The major extracellular cation is:
196. Decomposition of carbohydrates brought about by the action of enzymes liberating ethyl a. potassium b. sodium c. calcium d. iron
alcohol and CO2: 216. Which sugar will not give a red precipitate with cupric oxide when heated with Benedict’s
a. fermentation b. adsorption c. detoxification d. hydrolysis solution?
e. saponification a. glucose b. sucrose c. maltose d. fructose
197. Blood clotting can be prevented by: 217. Night blindness is a symptom of a deficiency in this vitamin:
a. sodium chloride b. potassium chloride c. sodium citrate a. vitamin A b. vitamin C c. vitamin B d. vitamin D
198. This hormone elevates blood sugar concentration: 218. The activation of pepsinogen requires:
a. insulin b. progesterone c. estrogen d. glucagons a. NaOH b. bicarbonate c. acetic acid d. HCl
199. Deficiency in this vitamin causes red blood cell fragility: 219. Nucleosides upon hydrolysis will yield:
a. vitamin A b. vitamin K c. Vitamin D d. vitamin E a. adenine + phosphate b. quanine + phosphate c. histones + ribose
200. The end-product in the hydrolysis of glycogen is: d. cytosine + ribose
a. galactose b. mannose c. glucose d. arabinose 220. Protein digestion starts in the:
201. In which form is glucose stored in the liver? a. mouth b. small intestine c. stomach d. large intestine
a. glycogen b. glucose (unchanged) c. sucrose d. starch 221. Major form of utilizable energy in all cells:
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a. ADP b. GDP c. ATP d. GTP b. activation, elongation, initiation, termination

222. Which of the following supplies the highest amount of energy per gram? c. initiation,activation, elongation, termination
a. fat b. glycogen c. protein d. starch d. activation, initiation, elongation, termination
223. The following are proteins in milk, except: 241. Genetic code is:
a. rennin b. casein c. lactoalbumin d. lactoglobulin a. universal b. composed of 3 nucleotides c. continuous d. all are correct
224. The conversion of beta carotene to vitamin A is carried out in the: 242. Which of the following is called transamination?
a. liver b. small intestine c. lungs d. pancreas a. conversion of amino acids to hydroxy acids c. lose of ammonia from
225. This sugar is also called an “invert sugar”: amino acids
a. sucrose b. fructose c. glucose d. galactose b. conversion of amino acids to keto acids d. formation of ammonium
226. What type of sugar is found in nucleic acids? salts from ammonia
a. riboses b. glucoses c. mannoses d. galactoses 243. Dextran is:
227. The biochemical function of hemoglobin is: a. carbohydrate b. glucose polymer c. glycoside d. protein
a. defense b. regulatory c. structural d. oxygen transport 244. A genetic disease due to defective mechanism for pyrimidine dimmers:
228. The following enzymes catalyze hydrolysis reactions, except: a. phenyl ketonuria b. xeroderma pigmentosum c. albinism
a. proteases b. esterases c. transaminases d. nucleases d. N-glycosyl linkage
229. Porphyrins are involved in the building of:
a. bones b. muscles c. blood d. connective tissue 246. The type of RNA molecule that brings amino acids to the site of protein synthesis is:
230. Which among the following sugar is sweetest? a. rRNA b. aRNA c. mRNA d. tRNA
a. glucose b. fructose c. sucrose d. galactose 247. Most allergies are caused by:
231. Information and control centers of the cell: a. Error in the immune system b. histamines produced by the body c. dust
a. nucleoproteins b. enzymes c. carbohydrates d. lipids d. all of the above
232. Hydrolysis of nucleoproteins will yield: 248. RNA which plays an important role in the structure and biosynthetic function of ribosome:
a. Nucleic acids and histones c. nucleic acid and purines a. mRNA b. rRNA c. tRNA d. DNA
b. nucleic acid and sugar d. nucleic acid and pyrimidines 249. In the secondary structure of RNA:
233. The condition wherein protein is found in the urine is: a. adenine will always pair with thymine c .cytosine will always pair with uracil;
a. glycosuria b. ketonuria c. proteinuria d. dysuria b. cytosine will always pair with thymine d. adinine will always pair with uracil
234. Alpha-hydroxy propionic acid is: 250. A nucleic acid is made up of:
a. lactic acid b. aminoacetic acid c. ascorbic acid d. pyruvic acid a. sugar, nucleoside and a base c. nitrogenous base, amino acid and sugar
235. This test detects the presence of indole rings: b. proteins, sugar and a phosphate group d. nitrogenous base, phosphate and sugar
a. Molisch b. Hopkin’s cole c. Millon’s d. Ninhydrin 251. Bond between 2 amino acids
236. The steps of central states: a. glycosidic bond b. N-glycosyl linkage c. peptide bond d. hydrogen bond
a. replication, translation and transcription c. replication, transcription and translation 252. Which of the following is not a test for protein?
b. replication, transcription and transmission d. transcription, translation and replication a. acrolein b. Biuret c. Millons d. xanthoproteic
237. Reverse transcription takes place in: 253. Acetyl CoA combines with oxaloacetate to form:
a. bacteria b. viruses c. algae d. molds a. citrate b. carnitine c. acyl-carnitine d. none of the above
238. The number of chromosomes in the human cells is: 254. The proteins that make the fur, wool, claws and feathers:
a. 41 b. 42 c. 43 d. 46 a. collagen b. keratin c. silk d. none of
239. Digestion of starch starts in the : the above
a. mouth b. stomach c. small intestine d. large intestine 255. Liquid vegetable oils may be transformed into solid fats by the process of:
240. The ordered steps in protein synthesis is: a. oxidation b. hydrogenation c. substitution d. reduction
a. transcription, transplantation, activation, elongation 256. The chemical messengers produced by the endocrine glands:
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a. genes b. hormones c. vitamins d. enzymes a. phospholipids b. glycolipids c. waxes d. fats

257. It is the sugar found in milk: 276. The metallic salt of a high fatty acid:
a. lactose b. maltose c. sucrose d. raffinose a. soap b. detergent c. inorganic salt d. glycerin
258. Prostaglandins are synthesized from: 277. The following are enzymes found in pancreatic juice, except:
a. oleic b. stearic c. essential fatty acid d. non-essential a. papain b. trypsin c. chymotrypsin d. carboxypolypepticase
fatty acid 278. The following are pathological constituents of urine, except:
259. Amino acid at an isoelectric point exists as: a. glucose b. albumin c. creatinine d. blood
a. acid b. base c. zwitterions d. none of the above 279. All of the following carbohydrates are considered to be polysaccharide, except:
260. The color of the skin, hair and eyes is due to pigment called: a. heparin b. starch c. glycogen d. maltose
a. cytochrome b. melanin c. keratin d. heparin 280. Which of the following hormones promotes rapid glycogenolysis in both liver and muscle:
261. Starches are partially digested in the mouth by: a. ACTH b. glutemine c. epinephrine d. prolacti
a. protease b. ptyalin c. pepsionogen d. pepsin 281. Fruity odor of urine is indicative of acetone bodies, a diagnostic value in case of acidosis in:
262. The only element in living matter from strong multiple bonds readily are: a. diabetes insipidus b. porphyria c. cretinism d. diabetes mellitus
a. oxygen b. nitrogen c. carbon d. all of the above 282. Rotation of polarized light is caused by solutions of all of the following amino acids, except:
263. Serotonin, a neurotransmitter, is derived from the amino acid: a. alanine b. glycine c. leucine d. valine
a. tryptophan b. threonine c. tyrosine d. phenylalanine 283. The precursor of vitamin D3:
264. Alkaline hydrolysis of fat: a. ergosterol b. stigmasterol c. 7-dehydrocholesterol d. cholesterol
a. saponification b. hydrogenation c. alkalinization d. hydroxylation 286. The enzyme present in the stomach which hydrolyzes proteins:
e. all of the above a. trypsin b. pepsin c. amylopsin d. enterokinase
265. The main center of biosynthesis of nucleic acid is the: 287. The reaction that takes place in cytoplasm:
a. cell wall b. cytoplasm c. nucleus d. none of the above a. aerobic b. anaerobic c. oxidation d. reduction
266. Normal pH of the blood: 288. Compounds of protein with a carbohydrate component:
a. 7.4-7.45 b. 6.6-6.9 c. 5.5-6.6 d. 4.8-8 a. lipoproteins b. phosphoproteins c. glycoproteins d. nucleoproteins
267. Known as good cholesterol: 289. What amino acid functions as a hormone?
a. HDL b. ergocalciferol c. ACTH d. LDL a. valine b. leucine c. alanine d. thyroxine
268. Blood minus its cellular components: 290. The pathway that occurs in the mitochondria:
a. plasma b. serum c. hemoglobin d. fibrin a. urea cycle b. citric acid cycle c. glycolysis d. fatty acid cycle
269. Which of the following is not an amino acid: 291. Carbohydrates that cannot be hydrolyzed to compounds with simpler molecules:
a. leucine b. choline c. valine d. lysine a. oligosaccharides b. disaccharides c. monosaccharides d. polysaccharides
270. Are globular proteins, except: 292. In the metabolism of protein, the liver:
a. collagen b. serum albumins c. serum globulins d. hemoglobin a. synthesizes amino acids b. breaks down amino acid c. absorbs blood
271. The precursor of vitamin A is: d. stores amino acid
a. arachidonic acid b. isoprene c. naphtoquinone d. carotene 293. What is the stage of glucose oxidation that requires oxygen?
272. Are fibrous proteins, except: a. anaerobic b. aerobic c. catabolic d. anabolic
a. keratin b. histones c. elastin d. collagen 294. An important protein in contractile muscle:
273. A type of antibodies that plays an important role in allergic response which causes anaphylactic a. keratin b. myosin c. elastin d. fibrin
shock, hayfever and asthma: 295. Which is the main constituent of the group substance in the connective tissue?
a. IgA b. IgM c. IgE d. IgG a. heparin b. fructosan c. hyaluronic acid d. mannosan
274. An inherited disease that affect red blood cells: 296. Raffinose, an important non-reducing sugar, is a:
a. albinism b. hyperglycemia c. sickle cell anemia d. hypoglycemia a. monosaccharide b. disaccharide c. trisaccharide d. tetrasaccharide
275. Are esters of fatty acids with glycerol: 297. Non-protein molecules that are often associated with proteins are called:
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a. prosthetic group b. side chain c. zwitterions d. casein

298. They are chemical messengers:
a. hormones b. enzymes c. vitamins d. amino acids
299. It is a polysaccharide:
a. lactose b. maltose c. amylose d. fructose
300. Which sugar contains an aldehyde group?
a. ketose b. aldose c. sorbitol d. mannitol