Biochemistry (Green) Flashcards
1
Q
- Amino acid at an isoelectric point exists as: a. acid c. zwitterions b. base d. all of the above
A
C
2
Q
- Hydrolytic product of chitin: a. iduronatet c. acetylglucosamine b. acetylgalactosamine d. glucuronic acid
A
C
3
Q
- Which of the following amino acids has a net positive charge at physiologic pH? a. cysteine c. lysine b. glutamic acid d. valine
A
C
4
Q
- Conjugated proteins which are a combination of amino acids and carbohydrates a. nucleoproteins c. phosphoproteins b. glycoproteins d. chromoproteins
A
B
5
Q
- Cerebrosides are positive in the ff. tests, except: a. Molisch c. Lassaigne’s b. Biuret d. none of the above
A
B
6
Q
- The ff. are neutral amino acids, except: a. methionine c. threonine b. lysine d. leucine
A
B
7
Q
- Acetyl CoA combines with oxaloacetate to form: a. citrate c. acyl-carnitine b. carnitine d. none of the above
A
A
8
Q
- The color of the skin, hair and eyes due to pigment called: a. cyctochrome c. keratin b. melanin d. heparin
A
B
9
Q
- The following are waxes except: a. beeswax c. bile acids b. sperm oil d. lanolin
A
C
10
Q
- Principle involved in the isolation of casein milk: a. salting in c. isoelectric precipitation b. salting out d. none of the above
A
C
11
Q
- All are pyrimidine bases except: a. guanine c. uracil b.cystocine d. thymine
A
A
12
Q
- The clinical test for the determination of cholesterol a. Liebermann-Burchard c. both a & b b. Salkowski d. none of the above
A
C
13
Q
- Protein digestion starts in the a. mouth b. stomach c. intestine d. pancreas
A
B
14
Q
- These are chemicals that are extracted from organism such as bacteria and can inhibit growth or destroy other microorganisms: a. antibiotic c. hormone b. enzyme d. vitamins
A
A
15
Q
- The transfer of genetic information from DNA by the formation of mRNA a. transcription c.transamination b. translation d. replication
A
A
16
Q
- Alkaline bismuth reagent is used to detect the presence of: a. polysaccharides c. reducing sugars b. dissacharides d. glycitols
A
C
17
Q
- What vitamin deficiency causes pellagra? a. riboflavin c. pantothenic acid b. thiamine d. nicotinic acid
A
D
18
Q
- The inactive form of an enzyme is sometimes called: a. zymogen c. apoenzye b. holoenzyme d. coenzyme
A
A
19
Q
- Condition wherein bile pigment is present in excess in the blood: a. jaundice c. cirrhosis b. hepatitis d. cystic fibrosis
A
A
20
Q
- Osazone test is also known as: a. Nylander’s c. Trommer’s b. Kowarsky test d. Folin’s test
A
B
21
Q
- Serine is converted to ethanolamine by the removal of: a. oxygen c. carbon dioxide b. ammonia d. carboxyl group
A
C
22
Q
- A common intermediate of metabolism of carbohydrates, fatty acids, and amino acids is a. glycerol d. oxaloacetate b. acetyl CoA e. acetylcholine c. acetoacetate
A
B
23
Q
- The most sensitive chemical test to detect the presence of glycerol in acrolein test: a. Liebberman-Burchard b. Formaldehyde-sulfuric acid b. Salkowski reaction d. Colorimetric spectrophotometry
A
A
24
Q
- Butter becomes rancid upon exposure to air due to formation of a. acetic acid c. formic acid b. butyric acid d. propionic acid
A
B
25
51. It is a model which best explains the enzyme-substrate action
a. lock & key c. VSEPR
b. molecular d. Kreb
A
26
94. ID test to detect the presence of glycogen:
a. phloroglucinol c. iodine
b. molisch d. seliwanoff
C
27
99. Specific test for galactose, due to the formation of highly insoluble crystals:
a. phenylhydrazine test c. mucic acid
b. fermentation d. molisch
C
28
185. Cellular elements of the blood devoid of nucleus
a. RBC c. thrombocytes
b. WMC d. all of the above
A
29
256. Liquid vegetable oils may be transformed into solid fats by the process of:
a. oxidation c. substitution
b. hydrogenation d. reduction
B
30
150. The metabolic degradation of hemoglobin takes place principally in
a. the reticuloendothelial system c. the white blood cells
b. the red blood cells d. the liver cell
A
31
178. The main carbohydrate of the blood is
a. D-fructose c. mannitol
b. D-glucose d. sorbitol
B
32
230. Porphyrins are involved in the building of
a. bones c. blood
b. muscles d. connective tissue
C
33
60. Complimentary base pairs in the DNA double helix are bonded by
a. H-bond c. vander waals
b. ester bond d. dipole dipole
A
34
203. Which of the following is NOT an ID test for proteins and amino acids?
a. Ninhydrin c.Biuret
b. Bial's d. Xanthoproteic
B
35
159. It is a disease due to protein deficiency
a. Kwashiorkor c. albuminuria
b. diabetes d. jaundice
A
36
257. The chemical messengers produced by the endocrine glands:
a. genes c. vitamins
b. hormones d. enzymes
B
37
10. The simplest monosaccharide is __________________
a. erythrose c. glyceraldehydes
b. starch d. arabinose
C
38
52. The activation of pepsinogen requires:
a. pepsin c. enterokinase
b. NaOH d. HCL
D
39
251. A nucleic acid is made up of:
a. sugar, nucleoside and a base
b. proteins, sugar and a phosphate group
c. nitrogenous base, amino acid and sugar
d. nitrogenous base, phosphate and sugar
D
40
296. Raffinose, an important non-reducing sugar is a:
a. monosacchride c. trisaccharide
b. disaccharide d. tetrasaccharide
C
41
202. In which form is glucose stored in the liver?
a. glycogen c. sucrose
b. glucose {unchanged} d. starch
A
42
119. In man, the principal end product of protein metabolism is:
a. uric acid c. pyruvic acid
b. lactic acid d. urea
D
43
183. The passage of the end products of digestion from the small intestine into the blood stream
a. metabolism d. oxidation
b. digestion e. reduction
c. absorption
C
44
298. They are chemical messengers
a. hormones c. vitamins
b. enzymes d. amino acids
A
45
226. This sugar is also called an "invert sugar"
a. sucrose c. glucose
b. fructose d. galactose
A
46
272. Are globular proteins, except:
a. collagen c. serum globulins
b. serum albumins d. hemoglobin
A
47
291. Carbohydrates that cannot be hydrolyzed to compounds with simpler molecules.
a. oligosaccharides c. monosaccharides
b. disaccharides d. polysaccharides
C
48
86. A mixed triglyceride contains:
a. three similar fatty acids esterified with glycerol
b. two similar fatty acids esterified with glycerol
c. three differebt fatty acids esterified with glycerol
d. all of the above
C
49
36. When trypsinogen is conoverted into tyrpsin, the enzyme is called:
a. pepsin c. enterokinase
b. zymogen d. amylase
C
50
262. Starches are partially digested in the mouth by:
a. protease c. pepsinogen
b. ptyalin d. pepsin
B
51
270. Blood minus its cellular components:
a. plasma c. hemoglobin
b. serum d. fibrin
A
52
145. The study of the composition and the chemical processes occurring in the living matter is:
a. qualitative chemistry d. quantitative chemistry
b. organic chemistry e. inorganic chemistry
c. biochemistry
C
53
267. Normal pH of the blood:
a. 7.4-7.5 c. 5.5-5.6
b. 6.6-6.9 d. 4.8-8
A
54
32. The site of oxidation reaction in electron transport chain is in the
a. nucleus b. mitochondrion
c. ribosome d. golgi bodies
B
55
57. Which of the following characteristic of lipid?
a. zwitterions c. hydrophobic
b. amphiphilic d. hydrophilic
C
56
142. The ff. are non-essential amino acids, except:
a. glycine c. cysteine
b. leucine d. glutamine
B
57
192. These are the glycolipids found in high concentration in the brain and nerve cells especially in the myelin
sheath
a. lecithin c. cerebrosides
b. cephalins d. sphingolipids
C
58
286. The enzyme present in the stomach which hydrolyzes proteins:
a. trypsin c. amylopsin
b. pepsin d. enterokinase
B
59
162. For the amino acid cycteine, choose the appropriate description of its side chain.
a. acidic c. aromatic
b. basic d. sulfur-containing
D
60
200. Deficiency in this vitamins causes red blood cell fragility
a. vitamin A c. vitamin D
b. vitamin K d. vitamin E
D
61
106. The complementary strand of CGACCTTGATCGACGTCGA:
a. TCGTTCCAGCTAGTACTAG c. AGCAAGGTCGATCATGATC
b. GCTGGAACTAGCTGCEGCT d. ATCAAGGTCGATCATGATC
B
62
181. The cholesterol molecule is
a. an aromatic ring c. a steroid
b. a straight chain acid d. tocopherol
C
63
108. Action of dilute alkali on sugars:
a. dehydration c. hydrolysis
b. hyperconjunction d. tautomerization
D
64
228. The biochemical function of hemoglobin is:
a. defense c. structural
b. regulatory d. oxygen transport
D
65
148. Transmission is:
a. conversion of amino acid to hydroxyl acid
b. loss of ammonia from amino acids
c. conversion of amino acids to keto acids
d. formation of ammonium salt from ammonia
C
66
18. Which of the following amino acids has no alpha amino group?
a. proline c. glycine
b. hydroxyproline d. both a and
D
67
275. A type of antibodies that plays an importance role in allergic response which causes anaphylactic shock,
hayfever and asthma:
a. IgA c. IgE
b. IgM d. IgG
C
68
8. The ionic property of amino acid is exhibited by its
a. zwitterions form c. COO group
b. NH2 group d. positively charged groups
A
69
255. The proteins that make the fur, wool, claws, and feathers.
a. collagen c. silk
b. keratin d. none of the above
B
70
37. Optimum temperature for enzyme activity in the body:
a.40oC c. 37oC
b.60oC d. 10oC
C
71
182. Which of the following is a phospholipids
a. glycogen c. sphingomyelin
b. prostaglandin d. oleic acid
C
72
284. Rotation of polarized light is caused by solutions of all of the following amino acids, except:
a. alanine c. leucine
b. glycine d. valine
B
73
201. The end-product in the hydrolysis of glycogen is:
a. galactose c. glucose
b. mannose d. arabinose
C
74
62. An organic cofactor in an enzyme
a. vitamins c. a & b
b. coenzymes d. none of these
C
75
264. Serotonin, a neurotransmitter is derived from amino acid:
a. tryptophan c. tyrosine
b. threonine d. phenylalanine
A
76
87. The central compound found in the structure of sphingolipids:
a. glycerol c. ceramide
b. sphingosine d. phosphocholine
C
77
28. Hypertonic solutions will cause the cell to:
a. swell b. shrink
c. burst d. undergo hemolysis
B
78
139. Growth hormone is also known as:
a. thyrotropic hormone c. ganodotropin
b. somatotropin d. interstitial stimulating hormone
B
79
266. The main center of biosynthesis of nucleic acid is the:
a. cell wall c. nucleus
b. cytoplasm d. none of the above
C
80
130. Principal site for the synthesis of urea:
a. kidney c. spleen
b. liver d. intestinal mucosa
B
81
100. Type of RNA which serves as template for the amino acid sequence being synthesized:
a. mRNA c. rRNA
b. tRNA d. none of the above
A
82
217. Which sugar will NOT give a red precipitate with cupric oxide when heated with Benedict's solution?
a. glucose b. maltose
c. sucrose d. fructose
B
83
240. Digestion of starch starts in the:
a. mouth c. small intestine
b. stomach d. large intestine
A
84
167. The reducing property of sugars is due to this group
a. aldehyde c. carboxyl
b. nitro d. methyl
A
85
283. Fruity odor of urine is indicative of acetone bodies, a diagnostic value in case of acidosis in:
a. diabetes insipidus c. cretinism
b. porphyria d. diabetes milletus
D
86
128. Process of converting liver glycogen into blood glusoce:
a. glycogenolysis c. glycolysis
b. gluconeogenesis d. glycogenesis
A
87
126. An official simple protein obtained from corn:
a. glutelin c. zein
b. gliadin d. maize
C
88
295. Which is the main constituent of the group substance in the connective tissues?
a. heparin c. hyaluronic acid
b. fructosan d. mannosan
C
89
105. Glucose and fructose are:
a. anomers c. geometric isomers
b. epimers d. allosteres
C
90
25. The end product of the hydrolysis of glycogen is:
a. galactose b. fructose
c. glucose d. arabinose
C
91
6. Which of the following is a precursor of vitamin D?
a. prostaglandin c. cholesterol
b. linoleic acid d. aldosterone
C
92
44. A hormone which stimulates glycogenesis:
a. insulin c. epinephrine
b. glucagons d. vasopressin
A
93
287. The reaction that takes place in ctoplasm
a. aerobic c. oxidation
b. anaerobic d. reduction
B
94
186. Is the sum total of all acitivities directed towards the maintenance of life
a. catabolism d. photosynthesis
b. anabolism e. fermentation
c. metabolism
C
95
154. Which is the monomer unit of proteins?
a. amino acid c. fatty acid
b. monosaccharide d. purine
A
96
209. All the amino acid below contain sulfur, EXCEPT:
a. cystine c. cysteine
b. methionine d. glycine
D
97
198. Blood clotting can be prevented by
a. sodium chloride c. sodium citrate
b. potassium chloride
C
98
161. The following are examples of chromoprotein except:
a. chlorophyll c. cytochromes
b. hemoglobin d. heparin
D
99
72. The common metabolic pathway
a. glycosis c. Kreb's cycle
b. beta oxidation d. glucogenesis
C
100
14. High concentration of neutral salts causes the precipitation of proteins. This is called__________.
a. salting out c. coagulation
b. salting in d. both b & c
A
101
172. Concentrated dehydrating acids change monosaccharides to
a. simple sugars d. uronic acids
b. saccharic acids e. aldric acids
c. furfurals
C
102
263. The only element in living matter from strong multiple bonds readily are:
a. oxygen c. carbon
b. nitrogen d. all of the above
C
103
158. Rotation of polarized light is caused by solutions of all of the following amino acids, except:
a. alanine c. leucine
b. glycine d. valine
B
104
268. Known as good cholesterol:
a. HDL c. ACTH
b. ergocalciferol d. LDL
A
105
46. The gland or tissue that regulates the blood glucose level.
a. parathyroid c. pancreas
b. thyroid d. adrenal
C
106
196. This compound id not a normal constituent of urine
a. sodium chloride c. urea
b. albumin d. uric acid
B
107
207. Which is NOT a B-complex vitamin?
a. folic acid c. Riboflavin
b. nicotinic acid d. ascorbic acid
D
108
77. The condition that lowers the pH of the blood due to starvation is called
a. acidosis c. hyperglycemia
b. alkalosis d. glycosuria
A
109
38. Glucose is stored in the liver, as:
a. galactose c. lactose
b. glycogen d. fructose
B
110
236. This test detects the presence of indole rings
a. Molisch c. Millon's
b. Hopkin's cole d. Niinhydrin
B
111
117. Pyridoxine is a component of this enzyme:
a. enolase c. hydrogenase
b. decarboxylase d. isomerase
B
112
149. The lipid that is converted to Vitamin D2 upon irradiation
a. ergosterol c. cholesterol
b. glycerol d. all of the above
A
113
23. What amount of glucose is present in the human blood?
a. 60 to 90 mg in 100 ml blood c. 2% of the total human body weight
b. 5 to 6 g in 100 ml blood d. none of these
A
114
224. The following are proteins in milk, EXCEPT?
a. rennin c. lactoalbumin
b. casein d. lactoglubulin
A
115
189. The principal site of glucose production in the human body is the
a. blood c. pituitary gland
b. liver d. small intestine
B
116
252. Bond between 2 amino acids
a. glycosidic bond c. peptide bond
b. N-glycosyl linkage d. hydrogen bond
C
117
227. What type of sugar is found in nucleic acids?
a. riboses b. mannoses
b. glucoses d. galactoses
A
118
144. Condition wherein the concentration of uric acid accumulates in blood reaches as high as 1mg.percent:
a. leukemia c. murexia
b. gout d. any of the above
B
119
233. Hydrolysis of nucleoproteins will yield:
a. nucleic acids and histones c. nucleic acid and purines
b. nucleic acid and sugar d. nucleic acid and pyrimidines
A
120
55. A synthetic DNA is called
a. replicated DNA c. gene
b. plasmid d. recombinant DNA
D
121
179. A normal value of glucose in the blood
a. 100 to 200 mg% c. 50 to 75 mg%
b. 80 to 120 mg% d. 200 to 300mg%
B
122
280. The following are pathological constituents of urine, except:
a. glucose c. creatinine
b. albumin d. blood
C
123
63. At what stage of glucose oxidation is most of the energy produced?
a. glycolysis c. glycogenesis
b. aerobic stage d. glycogenolysis
B
124
83. Osmic test is used to detect the presence of _______ in lipids:
a. metals c. unsaturated groups
b. prostate groups d. glycerol
B
125
56. Hydrolysis of ATP is an
a. energy requiring reaction c. no energy is involved
b. energy producing reaction d. energy is absorbed
B
126
49. It is the entire genetic make up of an organism.
a. gene c. codon
b. anticodon d. mutation
A
127
199. This hormone elevates blood sugar concentration
a. insulin c. estrogen
b. progesterone d. glucagons
D
128
20. Milk curdling enzyme present in gastric juice of infants:
a. pepsin b. rennin
c. trypsin d. maltase
B
129
299. It is a polysaccharide
a. lactose c. amylase
b. maltose d. fructose
C
130
133. Only form of inorganic nitrogen which can be utilized by living cells:
a. urea c. ammonia
b. ornithine d. nitrogen gas
C
131
109. The ff. are the components of DNA nucleosides, except:
a. phosphoric acid c. adenine
b. sugar d. cytosine
A
132
9. All of the following are simple proteins except:
a. glutelins c. albumins
b. globulins d. glycoproteins
D
133
15. It is the type of enzyme inhibition reaction whereby the inhibition competes with the substrate active site.
a. competitive inhibition c. reversible inhibition
b. noncompetitive d. incomplete inhibition
A
134
173. A mucopolysaccharide which possesses an anticoagulant property
a. pectin d. chitin
b. hyaluronic acid e. chondroitin sulfate
c. heparin
C
135
111. The ff. proteins are present in egg white, except:
a. ovomucin c. albumin
b. ovoglobulin d. osseomucoid
D
136
218. Night blindness is a symptom of a deficiency in this vitamin.
a. vitamin A c. vitamin B
b. vitamin C d. vitamin D
A
137
177. The product obtained from the partial hydrolysis of collagen
a. myosin d. fibrinogen
b. gelatin e. thrombin
c. actin
B
138
115. Genetic defect characterized by mental retardation and cataract, since the unmetabolized sugar is toxic to the
lens of the eyes:
a. galactosemia c. pentosuria
b. fructosemia d. fructosuria
A
139
164. Sickle cell anemia is the clinical manifestation of homozygous genes for an abnormal hemoglobin molecule.
The mutationl event responsible for the mutation in the beta chain is:
a. crossing over c. deletion
b. insertion d. point mutation
D
140
31. The active proteolytic enzyme in gastric juice is:
a. pepsin b. trypsin
c. maltase d. catalase
A
141
250. In the secondary structure of RNA:
a. adenine will always pair with thymine
b. cytosine will always pair with thymine
c. cytosine will always pair with uracil
d. adenine will always pair with uracil
D
142
129. Genetic information is stored and carried in all cells by:
a. single-stranded DNA c. double-stranded RNA
b. double-stranded DNA d. single stranded circular DNA
B
143
294. An important protein in contractile muscle.
a. keratin c. elastin
b. myosin d. fibrin
B
144
285. The precursor of vitamin D3:
a. ergosterol c. 7-dehydrocholesterol
b. stigmasterol d. cholesterol
C
145
281. All of the following carbohydrates are considered to be polysaccharide,except:
a. heparin c. glycogen
b. starch d. maltose
D
146
292. In the metabolism of protein, the liver
a. synthesizes amino acid c. absorbs blood
b. breaks down amino acid d. stores amino
D
147
120. Condition wherein acetone accumulates in the blood:
a. ketosuria c. ketosis
b. ketonemia d. ketonuria
B
148
131. Pentose present in gum arabic:
a. xylose c. arabinose
b. ribose d. threose
C
149
47. Which vitamin is formed in the body by exposure to ultraviolet Irradiation or sunlight
a. vit. A c. vit. C
b. vit. B d. vit. D
D
150
269. Optimum temperature for enzyme activity in the body:
a. 40C c. 10C
b. 60C d. 0C
A
151
54. It is the enzyme which hydrolyzed starch to dextrin and maltose
a. catalase c. pepsin
b. amylase d. lactase
B
152
95. The only sugar that readily forms insoluble osazone crystals:
a. lactose c. mannose
b.sucrose d. sucrose
C
153
208. The following sugars are aldohexoses EXCEPT:
a. fructose c. glucose
b. galactose d. mannose
A
154
64. The best known building blocks of RNA and DNA are
a. purines c. fatty acids
b. pyrimidines d. a and b
D
155
222. Major form of utilizable energy in all cells.
a. ADP c. ATP
b. GDP d. GTP
C
156
35. Which of the following is not an amino acid?
a. leucine b. choline
c. valine d. glycine
B
157
58. It is a condition that results when sugar level is below normal
a. hypoglycemia c. ketonuria
b. hyperglycemia d. uremia
A
158
134. The ff. are essential amino acids, except:
a. tyrosine c. methionine
b. lysine d. arginine
A
159
191. Separates from cells when blood is coagulated
a. fibrogen d. thrombin
b. plasma e. none of the above
c. serum
C
160
68. What is the end product of electron transport chain?
a. oxygen c. carbon dioxide
b. hydrogen d. water
D
161
75. The process of producing fats from acetyl co-A is called
a. glycolysis c. glycogenolysis
b. lipogenesis d. glucogenesis
B
162
4. Which hormones regulates the level of blood sodium?
a. aldosterone c. corticosteroid
b. sterol d. cortisone
A
163
70. It is the molecule that directs the activity of the cells
a. DNA c. nucleoproteins
b. RNA d. hormones
D
164
195. Complete digestion of all foodstuffs occurs in the
a. large intestine d. small intestine
b. stomach e. pancreas
c. mouth
D
165
135. The chief end product of purine metabolism in man
a. CO
c. uric acid
b. urea
d. ammonia
C
166
155. The proteinase that is found mostly in gastric juice of young animals
a. rennin d. ptyaiin
b. pepsin e. none of the above
c. steapsin
A
167
231. Which among the following sugar is sweetest?
a. glucose c. sucrose
b. fructose d. galactose
B
168
176. Polymers that are responsible for the metabolic capabilities and morphology of organisms are
a. carbohydrates c. polysaccharides
b. proteins d. nucleic acids
B
169
42. Glucose, amino acid and fatty acid enter the citric acid cycle by their conversion into:
a. pyruvate c. acetoacetyl CoA
b. acetyl CoA d. palmitic acid
B
170
265. Alkaline hydrolysis of fat:
a. saponofication d. glucocortoids
b. corticosteroids e. all of the above
c. bile acids
A
171
190. The major buffer of the extracellular fluid
a. bicarbonate-carbon dioxide c. phosphate
b. amino acids d. none of the above
A
172
30. The deficiency of this hormone causes diabetes mellitus:
a. progesterone b. testosterone
c. insulin d. glucagons
C
173
74. Detects the presence of alpha amino acids:
a. Biuret c. Ninhydrin
b. Molisch d. Hopkins-cole
C
174
160. Which of the following amino acids is not essential in mammals?
a. phenylaline c. tyrosine
b. lyxsine d. methionine
C
175
169. A condition known as atherosclerosis results as an accumulation in the blood vessels
a. calcium c. cholesterol
b. pathogens d. ketones
C
176
103. The difference between Benedict's and Barfoed's test reagent lies in:
a. sequestering agent used c. pH of the solution
b. active component used d. alkali used
C
177
242. Genetic code is:
a. universal c. continuous
b. composed of three nucleotides d. all are correct
D
178
61. Which nitrogen base is not found in DNA?
a. thymine c. uracil
b. cytosine d. guanine
C
179
168. The monosaccharide most rapidly absorbed from the small intestine is
a. glucose c. mannose
b. fructose d. galactose
D
180
116. Body functions of lipids:
a. transformation into proteins and carbohydrates
b. catabolism to provide body with heat and energy
c. insulation and paddings for organs
d. all of the above
D
181
282. Which of the following hormones promotes rapid glycogenolysis in both liver and muscle?
a. ACTH c. epinephrine
b. glutamine d. proclactin
C
182
175. Lactose can be differentiated from fructose by
a. Mucic acid test d. Iodine test
b. Barfoed's test e. Tollen's test
c. Fehling's test
B
183
259. Prostaglandins are synthesized from:
a. oleic c. essential fatty acid
b. stearic d. non-essential fatty acids
C
184
253. Which of the following is NOT a test for protein?
a. acrolein c. Millons
b. Biuret d. xanthoproteic
A
185
211. The test detects the presence of two or more peptide bonds:
a. Ninhydrin c. Tollen's
b. Fehling's d. Biuret
D
186
12. Competitive inhibition is a _________________ reaction.
a. reversible c. pH and temperature
b. irreversible d. none of these
A
187
21. Carbohydrates are
a. polyhydroxyaldehydes / polyhydroxyketones c. hemiacetals
b. polyhydroxy acids d. polymers of amino acids
A
188
11. Denaturation of protein is a result of
a. cleavage of the peptide bond c. breaking of H-bond
b. formation of H-bond d. none of these
C
189
235. Alpha-hydroxy propionic acid is:
a. lactic acid c. ascorbic acid
b. aminoacetic acid d. pyruvic acid
A
190
69. The energy producing reaction
a. metabolic c. anabolic
b. catabolic d. all of these
B
191
219. The activation of pepsinogen requires:
a. NaOH c. acetic acid
b. bicarbonate d. HCI
D
192
234. The condition wherein protein is found in the urine is:
a. glycosuria c. proteinuria
b. ketonuria d. dysuria
C
193
170. Ketoses can be differentiated from aldoses by this test
a. Molisch's test c. Seliwanoff's
b. Benedict's test d. Tollen's test
C
194
113. Ketogenic amino acids:
a. leucine c. pheylalanine
b. tyrosine d. all of the above
D
195
215. Photosynthesis is a process involved in the manufacture of
a. carbohydrates c. proteins
b. fats d. all of the above
A
196
297. Non-protein molecules that are often associated with proteins are called
a. prosthetic group c. zwitterions
b. side chain d. casein
A
197
53. DNA is primarily found in the
a. cytosol c. cell wall
b. nucleus/mitochondria d. endoplasmic reticulum
B
198
258. It is the sugar found in milk:
a. lactose c. sucrose
b. maltose d. rafinose
A
199
43. A hormone which stimulates glycogeneis:
a. insulin
b. glucagons
c. epinephrine
d. vasopressin
A
200
245. A genetic disease due to defective mechanism for pyrimidine dimers:
a. phenyl ketonuria c. albinism
b. xeroderma pigmentosum d. galactosemia
B
201
193. Alcohol in the body is
a. oxidized to CO2 and HOH c.excreted by kidneys
b. excreted mainly by lungs d. excreted by large intestine
A
202
73. Rosenheim's test is used to detect the presence of:
a. ethanolamine b. cholesterol
b. choline d. glycone moiety
B
203
274. Are fibrous proteins, except:
a. keratin c. elastin
b. histones d. collagen
B
204
80. IUPAC name of acrolyn
a. pentenal c. hexanal
c. propenal d. acetone
B
205
27. Benedict's reagent yield positive result to:
a. monosaccharide only b. reducing sugars
c. sucrose d. polysaccharides
B
206
289. What amino acid functions as a hormone?
a. valine c. alanine
b. leucine d. thyroxine
D
207
110. Central dogma concept wherein the RNA molecule is used as template
for the synthesis of DNA molecule:
a. transcription c. mutation
b. translation d. none of the above
D
208
85. The ff. are phospholipids, except:
a. plasmalogen c. cephalin
b. lecithin d. choline
D
209
249. RNA which plays an important role in the structure and biosynthetic function of ribosome:
a. mRNA c. tRNA
b. rRNA d. DNA
B
210
243. Which of the following is called transamination?
a. conversion of amino acids to hydroxyl acids
b. conversion of amino acids to keto acids
c. lose of ammonia from amino acids
d. formation of ammonium salts from ammonia
B
211
90. The ff. are glycolipids except:
a. globosides c. gangliosides
b. phosphatides d. cerebrosides
B
212
157. Gamma decarboxylation of aspartic acid produces
a. alanine c. glutamic acid
b. asparagines d. glycine
A
213
124. Amino acids positive for sakaguchi reaction:
a. gelatin c. arginine
b. alanine d. tyrosine
C
214
213. The end product of anaerobic glucose metabolism is:
a. pyruvate c. carbon dioxide
b. lactate d. water
B
215
248. Most allergies are caused by :
a. error in the immune system c. dust
b. histamines produced by the body d. all of the above
D
216
48. Excess vit. A & D is stored in the body, but excess vit. C & D is readily excreted. What property shows this?
a. vit C & D are water soluble c. both a & b
b. vit. A & D are fat soluble d. none of these
C
217
290. The pathway that occurs in the mitochondria.
a. urea cycle c. glycolysis
b. citric acid cycle d. fatty acid cycle
B
218
279. The following are enzymes found in pancreatic juice, except:
a. papain c. chymotrypsin
b. trypsin d. carboxypolypepticase
A
219
184. Endocrine gland that is a small oval body situated at the base of the brain
a. hypophysis c. adrenal
b. pancreas d. none of the above
A
220
66. Build up of urea in the kidney is called
a. ketonuria c. uremia
b. glycemia d. all of these
C
221
194. Which of the following tissues contains the enzyme glucose-6-Phosphatase and is able to supply glucose to
the blood?
a. heart c. liver
b. brain d. none of the above
C
222
93. The reagent present is Molisch test which is responsible for the dehydration reaction:
a. sodium carbonate c. sulfuric acid
b. magnesium stearate d. NaOH
C
223
232. Information and control centers of the cell:
a. nucleoproteins c. carbohydrates
b. enzymes d. lipids
A
224
271. Which of the following is NOT an amino acid:
a. leucine c. valine
b. choline d. lysine
B
225
50. The vitamin which is used in the prevention of degenerative changes in the central nervous system.
a. vit. A c. vit. C
b. vit. B complex d. vit. D
B
226
97. Hydrolysis of osazones produce:
a. phenylhydrazones c. sugars
b. ozones d. none of the above
B
227
29. Rancidity of fats maybe due to:
a. oxidation b. hydrogenation
c. saponification d. condensation
A
228
244. Dextran is:
a. carbohydrate c. glycoside
b. glucose polymer d. protein
A
229
89. Precipitate of ___________ indicates the presence of phospholipids in the lipid sample:
a. ammonium phosphomolybdate c. phosphorous triiodide
b. phosphorous periodate d. phospho-ammonium sulfate complex
A
230
165. When starches are heated, they produce
a. sugars c. dextrins
b. glycogen d. disaccharides
C
231
98. General term for a group of polysaccharides present in the primary cell wall:
a. xanthan c. pectin
b. mucilage d. carageenan
C
232
7. Which of these class of enzymes introduces double-bond by the removal of hydrogen
a. dehydrogenase c.decarboxylase
b. dehydrolase d. lipase
A
233
293. What is the stage of glucose oxidation that requires oxygen?
a. anaerobic c. catabolic
b. aerobic d. anabolic
B
234
140. What is the anticodon in tRNA that corresponds to the codon ACG in mRNA?
a. UGC c. GCA
b. TGC d. CGU
A
235
123. Phospoprotein found in egg yolk:
a. ovocasein c. vitelin
b. tendomucoid d. avidin
C
236
197. Decomposition of carbohydrates brought about by the action of enzymes liberating ethyl alcohol and carbon
dioxide
a. fermentation d. hydrolysis
b. adsorption e. saponification
c. detoxification
A
237
78. The substance responsible or the emulsion of fats is
a. HCI c. pepsin
b. bile acids d. trypsin
B
238
277. Are esters of fatty acids with glycerol:
a. phospholipids c. waxes
b. glycolipids d. fats
D
239
143. Principal digestive constituent of the gastric juice:
a. trypsin c. gastrin
b. pepsin d. enterokinase
B
240
221. Protein digestion starts in the
a. mouth c. stomach
b. small intestine d. large intestine
C
241
26. Iodine test is a reaction which may be used to identify carbohydrates. The reaction is due to
a. presence of the free aldehyde group
b presence of alcohol group
c. presence of amylose portion
d. presence of glucose
C
242
300. Which sugar contains an aldehyde group?
a. ketose c. sorbitol
b. aldose d. mannitol
B
243
288. Compounds of protein with a carbohydrate component:
a. lipoproteins c. glycoproteins
b. phosphoproteins d. nucleoproteins
C
244
17. The inactive form of enzymes are called ___________.
a. zymogens c. cofactor
b. apoenzymes d. both B & C
A
245
34. The conversion of an amino acid to sugar is:
a. gluconeogenesis b. glycolysis
c. glycogenesis d. glycogenolysisp
A
246
216. The major extracellular cation is
a. potassium c. calcium
b. sodium d. iron
B
247
39 The enzyme confirmation adapts to the incoming substrate in
a. Lock and Key theory c. competitive inhibition
b. glycogenesis d. glycogenolysis
B
248
102. Differentiating test between helical and linear polysaccharides:
a. Molisch c. Schweitzer
b. iodine d. fermentation
B
249
246. The bond joining pentose sugar to nitrogen base is:
a. 1, 4 glycosidic bond c. peptide bond
b. B 1, 4 glycosidic bond d. N-glycosyl linkage
A
250
76. The ff. test reagents to detect the presence of amino acids, execpt:
a. Grignard's c. Millon-Nasse
b. Xanthoproteic d. Sakaguchi
A
251
122. Oxidation product of ketone bodies:
a. reduced sugars c. alcohols
b. carbon dioxide d. aldehydes
B
252
101. Positive indication for Anthrone test:
a. purple ring c. effervescenve
b. blue-green color d. yellow ppt
B
253
212. This vitamin easily undergoes oxidation
a. vitamin A c. vitamin B12
b. vitamin C d. vitamin B1
B
254
40. The process of converting glucose into glycogen is called
a. gluconeogenesis c. glycolysis
b. glycogenesis d. glycogenolysis
B
255
112. Anaerobic glycolysis occurs in the
a. nucleus c. cytoplasm
b. mitochondria d. lysosomes
C
256
121. Glutamine is a _____________amino acid:
a. neutral c. acidic
b. basic d. racemin
A
257
2. The order and sequence of amino acid in a polypeptide determines what protein structure
a. primary c. tertiary
b. secondary d. quaternary
A
258
5. It is a precursor of vit. A
a. B-carotene c. retinal
b. retinol d. opium
A
259
147. The most important function of HCL in the stomach is
a. hydrolysis of protein d. destruction of bacteria
b. neutralization of chime e. stimulation of pancreatic
c. activation of pepsinogen secretion
C
260
24. It is the organelle which serves as the site of the electron transport chain.
a. mitochondria b. ribosome
c. nucleus d. lysosome
A
261
79. Hubl's solution is used to acertain degree of:
a. saturation c. peroxidation
b. unsaturation d. acidity
B
262
88. Lipid whose specific test is the Furter-Meyer test:
a. tocopherol c. sphingomyelin
b. retinol d. cerebroside
A
263
229. The following enzymes catalyze hydrolysis reactions, EXCEPT:
a. proteases c. transaminases
b. esterases d. nucleases
C
264
22. Insulin is usually classified as:
a. protein b. enzyme
c. hormone d. carbohydrates
C
265
59. An example of globular protein
a. albumin c. fibrin
b. collagen d. silk
A
266
36. The protein part of the enzyme molecule is the:
a.apoenzyme c. cofactor
b.coenzyme d. holoenzyme
A
267
81. The positive indication for the presence of glycerol in acrolein test:
a. yellow colored solution c. silver mirror formed in the test tube
b. black markings on filter d. play of colors, from blue to shades paper of red
B
268
125. Histidine is negative for:
a. Pauly reaction c. ninhydrine
b. sodium nitroprusside d. xanthoproteic
B
269
153. Ninhydrin give a blue coloration with
a. proteins c. amino acids
b. carbohydrates d. simple sugars
C
270
223. Which of the following supplies the highest amount of energy per gram?
a. fat c. protein
b. glycogen d. starch
A
271
278. The metallic salt of a high fatty acid:
a. soap c. inorganic salt
b. detergent d. glycerin
A
272
276. An inherited disease that affect red blood cells
a. albenism c. sickle cell anemia
b. hyperglycemia d. hypoglycemia
C
273
65. It is responsible for the storage and transmission of genetic information.
a. adenine c. DNA
b. RNA d. nucleic acid
C
274
137. Presence of glucose in appreciable amounts in the urine:
a. hematuria c. glycosemia
b. glycosuria d. akbuminaria
B
275
71. The sugar involved in DNA
a. ribose c. deoxyribose
b. pentose d. xylose
C
276
146. What is a wobble?
a. the ability of certain anticodons to pair with codons that differ at the third base
b. an error in translation induced by streptomycin
c. a mechanism that allows for a peptide extension in the 50S submit of the ribosome
d. thermal motions leading to local denaturation of the DNA double helix
A
277
37. The steps of central states:
a. replication, translation and transcription
b. replication, translation and transmission
c. replication, translation and translation
d. transcription, translation and replication
C
278
210. The following are essential fatty acids, EXCEPTt:
a. oleic acid c. linolenic acid
b. linoleic acid d. arachidonic acid
A
279
91. The parent compound of phosphoslipids:
a. glycerol c. ethanolamine
b. phosphatidic acid d. none of the above
B
280
1. The inhibition in noncompetitive reaction _________________.
a. competes with the active site of the enzyme
b. binds simultaneously with substrate other than the active site
c. increases the rate of reaction
d. both b and c
B
281
166. Check the incorrect statement
a. ribose is an aldopentose c. galactose is an aldohexose
b. maltose is a ketohexose d. glucose is an aldohexose
B
282
92. A non-pentose sugar which is also positive for Tollen' sphloroglucinol test:
a. galactose c. fructose
b. glucose d. cellobiose
D
283
247. The type of RNA molecule that brings amino acids to the site of protein synthesis is:
a. rRNA c. mRNA
b. aRNA d. Trna
D
284
19. An enzyme is a substance which
a. convert heat to energy b. act as a catalyst
c. change chemically in reaction d. is not specific in reaction
B
285
225. The conversion of beta carotene to vitamin A is carried out in the
a. liver c. lungs
b. small intestine d. pancreas
A
286
151. The amino acid that is an important precursor of hemoglobin is
a. alanine c. glycine
b. proline d. cysteine
C
287
187. This substance accumulates in the muscles as a result of vigorous exercise
a. muscle glycogen c. lactic acid
b. amino acids d. glucose
C
288
174. Which of the following is the test for reducing sugars for urine?
a. Benedict's test c. Biuret test
b. Acrolein test d. Brown Ring test
A
289
206. The sugar that yields only glucose when hydrolyzed is:
a. galactose c. fructose
b. maltose d. sucrose
B
290
132. Which of the following is responsible for the transfer of genetic information?
a. ATP c. DNA
b. GTP d. RNA
C
291
3. Amino acids that cannot be synthesized in the organism are called__________.
a. non essential amino acids c. standard amino acids
b. essential amino acids d. alpha amino acids
B
292
13. In the Seliwanioff's test, the reaction of resorcinol and acid on the sugar forms___________.
a. hydroxymethyl furfural c. hydraxine
b. pyranose d. purine
A
