Biochemistry (PACOP Green) Flashcards
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. Binds simultaneously with substrate other than the active site
The order and sequence of amino acid in a polypeptide determines what protein structure
a. Primary
b. Secondary
c. Tertiary
d. Quaternary
a. Primary
Amino acids that cannot be synthesized in the organism are called ___________
a. Non-essential amino acids
b. Essential amino acids
c. Standard amino acids
d. Alpha amino acids
b. Essential amino acids
Which hormones regulate the level of blood sodium?
a. Aldosterone
b. Sterol
c. Corticosteroid
d. Cortisone
a. Aldosterone
It is a precursor of vitamin A
a. β-carotene
b. Retinol
c. Retinal
d. Opium
a. β-carotene
Which of the following is a precursor of vitamin D?
a. Prostaglandin
b. Linoleic acid
c. Cholesterol
d. Aldosterone
c. Cholesterol
Which of these class of enzymes introduces double-bond by the removal of hydrogen?
a. Dehydrogenase
b. Dehydrolase
c. Decarboxylase
d. Lipase
d. Lipase
The ionic property of amino acid is exhibited by its:
a. Zwitterions form
b. NH2 group
c. COO group
d. Positively charged groups
a. Zwitterions form
All of the following are simple proteins except:
a. Glutelins
b. Globulins
c. Albumins
d. Glycoproteins
d. Glycoproteins
The simplest monosaccharide is __________
a. Erythrose
b. Starch
c. Glyceraldehydes
d. Arabinose
Denaturation of protein is a result of:
a. Cleavage of the peptide bond
b. Formation of H-bond
c. Breaking of H-bond
d. None of these
c. Breaking of H-bond
Competitive inhibition is a __________ reaction
a. Reversible
b. Irreversible
c. pH and temperature dependent
d. None of these
a. Reversible
In the Seliwanoff’s test, the reaction of resorcinol and acid on the sugar forms __________
a. Hydroxymethyl furfural
b. Pyranose
c. Hydraxine
d. Purine
a. Hydroxymethyl furfural
High concentration of neutral salts causes the precipitation of proteins. This is called __________
a. Salting out
b. Salting in
c. Coagulation
d. Both b & c
a. Salting out
It is the type of enzyme inhibition reaction whereby the inhibition competes with the substrate active site
a. Competitive inhibition
b. Noncompetitive
c. Reversible inhibition
d. Incomplete inhibition
a. Competitive inhibition
The following are waxes except:
a. Beeswax
b. Sperm oil
c. Bile acids
d. Lanolin
a. Beeswax
The inactive form of enzymes are called __________
a. Zymogens
b. Apoenzymes
c. Cofactor
d. Both b & c
a. Zymogens
Which of the following amino acids has no alpha amino group?
a. Proline
b. Hydroxyproline
c. Glycine
d. Both a & b
d. Both a & b
An enzyme is a substance which
a. Converts heat to energy
b. Acts as a catalyst
c. Change chemically in a reaction
d. Is not specific in reaction
b. Acts as a catalyst
Milk curdling enzyme present in gastric juice of infants
a. Pepsin
b. Rennin
c. Trypsin
d. Maltase
b. Rennin
Carbohydrates are
a. Polyhydroxyaldehydes/Polyhydroxyketones
b. Polyhydroxyacids
c. Hemiacetals
d. Polymers of amino acids
a. Polyhydroxyaldehydes/Polyhydroxyketones
Insulin is usually classified as:
a. Protein
b. Enzyme
c. Hormone
d. Carbohydrate
c. Hormones
What amount of glucose is present in the human blood?
a. 60 to 90 mg in 100 mL of blood
b. 5 to 6 g in 100 mL of blood
c. 2% of the total human body weight
d. None of these
a. 60 to 90 mg in 100 mL of blood
It is the organelle which serves as the site of the electron transport chain
a. Mitochondria
b. Ribosome
c. Nucleus
d. Lysosome
a. Mitochondria
The end product of the hydrolysis of glycogen is:
a. Galactose
b. Fructose
c. Glucose
d. Arabinose
c. Glucose
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. Presence of amylose portion
Benedict’s reagent yield positive result to:
a. Monosaccharide only
b. Reducing sugars
c. Sucrose
d. Polysaccharides
b. Reducing sugars
Hypertonic solutions will cause the cell to:
a. Swell
b. Shrink
c. Burst
d. Undergo hemolysis
b. Shrink
Rancidity of fats may be due to:
a. Oxidation
b. Hydrogenation
c. Saponification
d. Condensation
a. Oxidation
The deficiency of this hormone causes diabetes mellitus:
a. Progesterone
b. Testosterone
c. Insulin
d. Glucagons
c. Insulin
The active proteolytic enzyme in gastric juice is:
a. Pepsin
b. Trypsin
c. Maltase
d. Catalase
a. Pepsin
The site of oxidation reaction in electron transport chain is in the:
a. Nucleus
b. Mitochondrion
c. Ribosome
d. Golgi bodies
b. Mitochondrion
Protein digestion starts in the:
a. Mouth
b. Stomach
c. Intestine
d. Pancreas
B. Stomach
The conversion of an amino acid to sugar is:
a. Gluconeogenesis
b. Glycolysis
c. Glycogenesis
d. Glycogenolysis
a. Gluconeogenesis
Which of the following is not an amino acid?
a. Leucine
b. Choline
c. Valine
d. Glycine
b. Choline
When trypsinogen is converted into trypsin, the enzyme is called:
a. Pepsin
b. Zymogen
c. Enterokinase
d. Amylase
c. Enterokinase
The protein part of the enzyme molecule is the:
a. Apoenzyme
b. Coenzyme
c. Cofactor
d. Holoenzyme
a. Apoenzyme
Optimum temperature for enzyme activity in the body
a. 40°C
b. 60°C
c. 37°C
d. 10°C
c. 37°C
Glucose is stored in the liver, as:
a. Galactose
b. Glycogen
c. Lactose
d. Fructose
b. Glycogen
The enzyme confirmation adapts to the incoming substrate in:
a. Lock and key theory
b. Glycogenesis
c. Competitive inhibition
d. Glycogenolysis
b. Glycogenesis
The process of converting glucose into glycogen is called:
a. Gluconeogenesis
b. Glycogenesis
c. Glycolysis
d. Glycogenolysis
b. Glycogenesis
All are pyrimidine bases except:
a. Guanine
b. Cytosine
c. Uracil
d. Thymine
a. Guanine
Glucose, amino acid, and fatty acid enter the citric acid cycle by their conversion into:
a. Pyruvate
b. Acetyl CoA
c. Acetoacetyl CoA
d. Palmitic acid
b. Acetyl CoA
A hormone which stimulates glycogenesis
a. Insulin
b. Glucagon
c. Epinephrine
d. Vasopressin
a. Insulin
These are chemicals that are extracted from organism such as bacteria and can inhibit growth or destroy other microorganisms
a. Antibiotic
b. Enzyme
c. Hormone
d. Vitamins
a. Antibiotic
The gland or tissue that regulates the blood glucose level
a. Parathyroid
b. Thyroid
c. Pancreas
d. Adrenal
c. Pancreas
Which vitamin is formed in the body by exposure to ultraviolet irradiation or sunlight
a. Vitamin A
b. Vitamin B
c. Vitamin C
d. Vitamin D
d. Vitamin D
Excess vitamin A and D is stored in the body, but excess vitamin C and D is readily excreted. What property shows this?
a. Vitamin C & D are water soluble
b. Vitamin A & D are fat soluble
c. Both A & B
d. None of these
c. Both A & B
It is the entire genetic makeup of an organism
a. Gene
b. Anticodon
c. Codon
d. Mutation
a. Gene
The vitamin which is used in the prevention of degenerative changes in the central nervous system
a. Vitamin A
b. Vitamin B complex
c. Vitamin C
d. Vitamin D
b. Vitamin B complex
It is a model which best explains the enzyme-substrate action
a. Lock & key
b. Molecular
c. VSEPR
d. Kreb
a. Lock & Key
The activation of pepsinogen requires:
a. Pepsin
b. NaOH
c. Enterokinase
d. HCl
d. HCl
DNA is primarily found in the:
a. Cytosol
b. Nucleus/mitochondria
c. Cell wall
d. Endoplasmic reticulum
b. Nucleus/mitochondria
It is the enzyme which hydrolyzes starch to dextrin and maltose
a. Catalase
b. Amylase
c. Pepsin
d. Lactase
b. Amylase
A synthetic DNA is called
a. Replicated DNA
b. Plasmid
c. Gene
d. Recombinant DNA
d. Recombinant DNA
Hydrolysis of ATP is an:
a. Energy requiring reaction
b. Energy producing reaction
c. No energy is involved
d. Energy is absorbed
b. Energy producing reaction
Which of the following is a characteristic of lipid?
a. Zwitterions
b. Amphiphilic
c. Hydrophobic
d. Hydrophilic
c. Hydrophobic
It is a condition that results when sugar level is below normal
a. Hypoglycemia
b. Hyperglycemia
c. Ketonuria
d. Uremia
a. Hypoglycemia
An example of globular protein
a. Albumin
b. Collagen
c. Fibrin
d. Silk
a. Albumin
Complementary base pairs in the DNA double helix are bonded by:
a. H-bond
b. Ester bond
c. Van der Waals
d. Dipole-dipole
a. H-bond
Which nitrogen base is not found in DNA?
a. Thymine
b. Cytosine
c. Uracil
d. Guanine
c. Uracil
An organic cofactor in an enzyme
a. Vitamins
b. Coenzymes
c. A & B
d. None of these
c. A & B
At which stage of glucose oxidation is most of the energy produced?
a. Glycolysis
b. Aerobic stage
c. Glycogenesis
d. Glycogenolysis
b. Aerobic stage
The best known building blocks of RNA and DNA are:
a. Purines
b. Pyrimidines
c. Fatty acids
d. A and B
d. A and B
It is responsible for the storage and transmission of genetic information
a. Adenine
b. RNA
c. DNA
d. Nucleic acid
c. DNA
Buildup of urea in the kidney is called:
a. Ketonuria
b. Glycemia
c. Uremia
d. All of these
c. Uremia
The transfer of genetic information from DNA by the formation of mRNA
a. Transcription
b. Translation
c. Transamination
d. Replication
a. Transcription
What is the end product of electron transport chain?
a. Oxygen
b. Hydrogen
c. Carbon dioxide
d. Water
d. Water
The energy producing reaction
a. Metabolic
b. Catabolic
c. Anabolic
d. All of these
b. Catabolic
It is the molecule that directs the activity of the cells
a. DNA
b. RNA
c. Nucleoproteins
d. Hormones
d. Hormones
The sugar involved in DNA
a. Ribose
b. Pentose
c. Deoxyribose
d. Xylose
c. Deoxyribose
The common metabolic pathway
a. Glycolysis
b. Beta oxidation
c. Kreb’s cycle
d. Glucogenesis
c. Kreb’s cycle
Rosenheim’s test is used to detect the presence of:
a. Ethanolamine
b. Choline
c. Cholesterol
d. Glycone moiety
b. Choline
Detects the presence of alpha amino acids:
a. Biuret
b. Molisch
c. Ninhydrin
d. Hopkins-cole
c. Ninhydrin
The process of producing fats from acetyl CoA is called:
a. Glycolysis
b. Lipogenesis
c. Glycogenolysis
d. Glucogenesis
b. Lipogenesis
The following test reagents are used to detect the presence of amino acids, except:
a. Grignard’s
b. Xanthoproteic
c. Millon-Nasse
d. Sakaguchi
a. Grignard’s
The condition that lowers the pH of the blood due to starvation is called:
a. Acidosis
b. Alkalosis
c. Hyperglycemia
d. Glycosuria
a. Acidosis
The substance responsible for the emulsion of fats is:
a. HCl
b. Bile acids
c. Pepsin
d. Trypsin
b. Bile acids
Hubl’s solution is used to ascertain degree of:
a. Saturation
b. Unsaturation
c. Peroxidation
d. Acidity
b. Unsaturation
IUPAC name of acrolyn
a. Pentenal
b. Propenal
c. Hexanal
d. Acetone
b. Propenal
The positive indication for the presence of glycerol in acrolein test:
a. Yellow colored solution
b. Black markings on filter
c. Silver mirror formed in the test tube
d. Play of colors, from blue to shades of red
b. Black markings on filter
Cerebrosides are positive in the following tests, except:
a. Molisch
b. Biuret
c. Lassaigne’s
d. None of the above
b. Biuret
Osmic test is used to detect the presence of __________ in lipids:
a. Metals
b. Phosphate group
c. Unsaturated group
d. Glycerol
b. Phosphate group
The most sensitive chemical test to detect the presence of glycerol in acrolein test
a. Liebermann-Burchard test
b. Salkowski reaction
c. Formaldehyde-sulfuric acid
d. Colorimetric spectrophotometry
a. Liebermann-Burchard test
The following are phospholipids, except:
a. Plasmalogen
b. Lecithin
c. Cephalin
d. Choline
d. Choline
A mixed triglyceride contains:
a. Three similar fatty acids esterified with glycerol
b. Two similar fatty acids esterified with glycerol
c. Three different fatty acids esterified with glycerol
d. All of the above
c. Three different fatty acids esterified with glycerol
The central compound found in the structure of sphingolipids:
a. Glycerol
b. Sphingosine
c. Ceramide
d. Phosphocholine
c. Ceramide
Lipid whose specific test is the Furter-Meyer test
a. Tocopherol
b. Retinol
c. Sphingomyelin
d. Cerebroside
a. Tocopherol
Precipitate of __________ indicates the presence of phospholipids in the lipid sample
a. Ammonium phosphomolybdate
b. Phosphorus periodate
c. Phosphorus triiodide
d. Phospho-ammonium sulfate complex
a. Ammonium phosphomolybdate
The following are glycolipids except:
a. Globosides
b. Phosphatides
c. Gangliosides
d. Cerebrosides
b. Phosphatides
The parent compound of phospholipids
a. Glycerols
b. Phospatidic acid
c. Ethanolamine
d. None of the above
b. Phosphatidic acid
A non-pentose sugar which is also positive for Tollen’s sphloroglucinol test
a. Galactose
b. Glucose
c. Fructose
d. Cellobiose
d. Cellobiose
The reagent present in Molisch test which is responsible for the dehydration reaction
a. Sodium carbonate
b. Magnesium stearate
c. Sulfuric acid
d. NaOH
c. Sulfuric acid
ID test to detect the presence of glycogen
a. Phloroglucinol
b. Molisch
c. Iodine
d. Seliwanoff
c. Iodine
The only sugar that readily forms insoluble osazone crystals
a. Lactose
b. Sucrose
c. Mannose
d. Sucrose
c. Mannose
Important structural material found in the exoskeletons of many lower animals
a. Chondroitin
b. Heparin
c. Hyaluronic acid
d. Chitin
d. Chitin
Hydrolysis of osazones produce:
a. Phenylhydrazones
b. Ozones
c. Sugars
d. None of the above
b. Ozones
General term for a group of polysaccharides present in the primary cell wall
a. Xanthan
b. Mucilage
c. Pectin
d. Carageenan
c. Pectin
Specific test for galactose, due to the formation of highly insoluble crystals
a. Phenylhydrazine test
b. Fermentation
c. Mucic acid
d. Molisch
c. Mucic acid
Type of RNA which serves as a template for the amino acid sequence being synthesized
a. mRNA
b. tRNA
c. rRNA
d. None of the above
a. mRNA
Positive indication for Anthrone test
a. Purple ring
b. Blue-green color
c. Effervescence
d. Yellow ppt
b. Blue-green color
Differentiating test between helical and linear polysaccharides
a. Molisch
b. Iodine
c. Schweitzer
d. Fermentation
b. Iodine
The difference between Benedict’s and Barfoed’s test reagent lies in:
a. Sequestering agent used
b. Active component used
c. pH of the solution
d. Alkali used
c. pH of the solution
Hydrolytic product of chitin
a. Iduronate
b. Acetylgalactosamine
c. Acetylglucosamine
d. Glucuronic acid
c. Acetylglucosamine
Glucose and fructose are:
a. Anomers
b. Epimers
c. Geometric isomers
d. Allosteres
c. Geometric isomers
The complementary strand of CGACCTTGATCGACGTCGA:
a. TCGTTCCAGCTAGTACTAG
b. GCTGGAACTAGCTGCEGCT
c. AGCAAGGTCGATCATGATC
d. ATCAAGGTCGATCATGATC
b. GCTGGAACTAGCTGCEGCT
Alkaline bismuth reagent is used to detect the presence of:
a. Polysaccharides
b. Dissacharides
c. Reducing sugars
d. Glycitols
c. Reducing sugars
The following are the components of DNA nucleosides, except:
a. Phosphoric acid
b. Sugar
c. Adenine
d. Cytosine
a. Phosphoric acid
Central dogma concept wherein the RNA molecule is used as template
for the synthesis of DNA molecule:
a. Transcription
b. Translation
c. Mutation
d. None of the above
d. None of the above
The following proteins are present in egg white, except:
a. Ovomucin
b. Ovoglobulin
c. Albumin
d. Osseomucoid
d. Osseomucoid
Anaerobic glycolysis occurs in the:
a. Nucleus
b. Mitochondria
c. Cytoplasm
d. Lysosomes
c. Cytoplasm
Ketogenic amino acids:
a. Leucine
b. Tyrosine
c. Phenylalanine
d. All of the above
d. All of the above
Osazone test is also known as:
a. Nylander’s
b. Kowarsky test
c. Trommer’s
d. Folin’s test
b. Kowarsky test
Genetic defect characterized by mental retardation and cataract, since the unmetabolized sugar is toxic to the lens of the eyes:
a. Galactosemia
b. Fructosemia
c. Pentosuria
d. Fructosuria
a. Galactosemia
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. All of the above
Pyridoxine is a component of this enzyme:
a. Enolase
b. Decarboxylase
c. Hydrogenase
d. Isomerase
b. Decarboxylase
The following are neutral amino acids, except:
a. Methionine
b. Lysine
c. Threonine
d. Leucine
b. Lysine
In man, the principal end product of protein metabolism is:
a. Uric acid
b. Lactic acid
c. Pyruvic acid
d. Urea
d. Urea
Condition wherein acetone accumulates in the blood:
a. Ketosuria
b. Ketonemia
c. Ketosis
d. Ketonuria
b. Ketonemia
Glutamine is a _____________amino acid:
a. Neutral
b. Basic
c. Acidic
d. Racemin
a. Neutral
Oxidation product of ketone bodies:
a. Reduced sugars
b. Carbon dioxide
c. Alcohols
d. Aldehydes
b. Carbon dioxide
Phospoprotein found in egg yolk:
a. Ovocasein
b. Tendomucoid
c. Vitelin
d. Avidin
c. Vitelin
Amino acids positive for Sakaguchi reaction:
a. Gelatin
b. Alanine
c. Arginine
d. Tyrosine
c. Arginine
Histidine is negative for:
a. Pauly reaction
b. Sodium nitroprusside
c. Ninhydrin
d. Xanthoproteic
b. Sodium nitroprusside
An official simple protein obtained from corn:
a. Glutelin
b. Gliadin
c. Zein
d. Maize
c. Zein
Principle involved in the isolation of casein milk:
a. Salting in
b. Salting out
c. Isoelectric precipitation
d. None of the above
c. Isoelectric precipitation
Process of converting liver glycogen into blood glucose:
a. Glycogenolysis
b. Gluconeogenesis
c. Glycolysis
d. Glycogenesis
a. Glycogenolysis
Genetic information is stored and carried in all cells by:
a. Single-stranded DNA
b. Double-stranded DNA
c. Double-stranded RNA
d. Single stranded circular DNA
b. Double-stranded DNA
Principal site for the synthesis of urea
a. Kidney
b. Liver
c. Spleen
d. Intestinal mucosa
b. Liver
Pentose present in gum arabic:
a. Xylose
b. Ribose
c. Arabinose
d. Threose
c. Arabinose
Which of the following is responsible for the transfer of genetic information?
a. ATP
b. GTP
c. DNA
d. RNA
c. DNA
Only form of inorganic nitrogen which can be utilized by living cells:
a. Urea
b. Ornithine
c. Ammonia
d. Nitrogen gas
c. Ammonia
The following are essential amino acids, except:
a. Tyrosine
b. Lysine
c. Methionine
d. Arginine
a. Tyrosine
The chief end product of purine metabolism in man
a. CO
b. Urea
c. Uric acid
d. Ammonia
c. Uric acid
The principal end product of protein metabolism:
a. Carbon dioxide
b. Ammonia
c. Hippuric acid
d. Urea
d. Urea
Presence of glucose in appreciable amounts in the urine
a. Hematuria
b. Glycosuria
c. Glycosemia
d. Akbuminaria
b. Glycosuria
The following are the tests for kidney efficiency, except:
a. Phenolsulfophthalein test
b. Urea clearance test
c. Water output test
d. Crystallization method
d. Crystallization method
Growth hormone is also known as:
a. Thyrotropic hormone
b. Somatotropin
c. Gonadotropin
d. Interstitial stimulating hormone
b. Somatotropin
What is the anticodon in tRNA that corresponds to the codon ACG in mRNA?
a. UGC
b. TGC
c. GCA
d. CGU
a. UGC
Condition wherein bile pigment is present in excess in the blood:
a. Jaundice
b. Hepatitis
c. Cirrhosis
d. Cystic fibrosis
a. Jaundice
The following are non-essential amino acids, except:
a. Glycine
b. Leucine
c. Cysteine
d. Glutamine
b. Leucine
Principal digestive constituent of the gastric juice:
a. Trypsin
b. Pepsin
c. Gastrin
d. Enterokinase
b. Pepsin
Condition wherein the concentration of uric acid accumulates in blood reaches as high as 1mg percent:
a. Leukemia
b. Gout
c. Murexia
d. Any of the above
b. Gout
The study of the composition and the chemical processes occurring in the living matter is:
a. Qualitative chemistry
b. Organic chemistry
c. Biochemistry
d. Quantitative chemistry
e. Inorganic chemistry
c. Biochemistry
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. The ability of certain anticodons to pair with codons that differ at the third base
The most important function of HCl in the stomach is:
a. Hydrolysis of protein
b. Neutralization of chime
c. Activation of pepsinogen secretion
d. Destruction of bacteria
e. Stimulation of pancreatic
c. Activation of pepsinogen secretion
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
keto acids
The lipid that is converted to Vitamin D2 upon irradiation
a. Ergosterol
b. Glycerol
c. Cholesterol
d. All of the above
a. Ergosterol
The metabolic degradation of hemoglobin takes place principally in:
a. The reticuloendothelial system
b. The red blood cells
c. The white blood cells
d. The liver cell
a. The reticuloendothelial system
The amino acid that is an important precursor of hemoglobin is:
a. Alanine
b. Proline
c. Glycine
d. Cysteine
c.Glycine
Serine is converted to ethanolamine by the removal of:
a. Oxygen
b. Ammonia
c. Carbon dioxide
d. Carboxyl group
c. Carbon dioxide
Ninhydrin give a blue coloration with:
a. Proteins
b. Carbohydrates
c. Amino acids
d. Simple sugars
c. Amino acids
Which is the monomer unit of proteins?
a. Amino acid
b. Monosaccharide
c. Fatty acid
d. Purine
a. Amino acid
The proteinase that is found mostly in gastric juice of young animals
a. Rennin
b. Pepsin
c. Steapsin
d. Ptyalin
e. None of the above
a. Rennin
Conjugated proteins which are a combination of amino acids and carbohydrates
a. Nucleoproteins
b. Glycoproteins
c. Phosphoproteins
d. Chromoproteins
b. Glycoproteins
Gamma decarboxylation of aspartic acid produces:
a. Alanine
b. Asparagines
c. Glutamic acid
d. Glycine
a. Alanine
Rotation of polarized light is caused by solutions of all of the following amino acids, except:
a. Alanine
b. Glycine
c. Leucine
d. Valine
b. Glycine
It is a disease due to protein deficiency
a. Kwashiorkor
b. Diabetes
c. Albuminuria
d. Jaundice
a. Kwashiorkor
Which of the following amino acids is not essential in mammals?
a. Phenylalanine
b. Lysine
c. Tyrosine
d. Methionine
c. Tyrosine
The following are examples of chromoprotein except:
a. Chlorophyll
b. Hemoglobin
c. Cytochromes
d. Heparin
d. Heparin
For the amino acid cysteine, choose the appropriate description of its side chain.
a. Acidic
b. Basic
c. Aromatic
d. Sulfur-containing
d. Sulfur-containing
Which of the following amino acids has a net positive charge at physiologic pH?
a. Cysteine
b. Glutamic acid
c. Lysine
d. Valine
c. Lysine
Sickle cell anemia is the clinical manifestation of homozygous genes for an abnormal hemoglobin molecule. The mutation event responsible for the mutation in the beta chain is:
a. Crossing over
b. Insertion
c. Deletion
d. Point mutation
d. Point mutation
When starches are heated, they produce:
a. Sugars
b. Glycogen
c. Dextrins
d. Disaccharides
Check the incorrect statement:
a. Ribose is an aldopentose
b. Maltose is a ketohexose
c. Galactose is an aldohexose
d. Glucose is an aldohexose
b. Maltose is a ketohexose
The reducing property of sugars is due to this group:
a. Aldehyde
b. Nitro
c. Carboxyl
d. Methyl
a. Aldehyde
The monosaccharide most rapidly absorbed from the small intestine is:
a. Glucose
b. Fructose
c. Mannose
d. Galactose
d. Galactose
A condition known as atherosclerosis results as an accumulation in the blood vessels
a. Calcium
b. Pathogens
c. Cholesterol
d. Ketones
c. Cholesterol
Ketoses can be differentiated from aldoses by this test:
a. Molisch’s test
b. Benedict’s test
c. Seliwanoff’s test
d. Tollen’s test
c. Seliwanoff’s test
The clinical test for the determination of cholesterol
a. Liebermann-Burchard
b. Salkowski
c. Both a & b
d. None of the above
c. Both a & b
Concentrated dehydrating acids change monosaccharides to:
a. Simple sugars
b. Saccharic acids
c. Furfurals
d. Uronic acids
e. Aldric acids
c. Furfurals
A mucopolysaccharide which possesses an anticoagulant property
A. Pectin
b. Hyaluronic acid
c. Heparin
d. Chitin
e. Chondroitin sulfate
c. Heparin
Which of the following is the test for reducing sugars for urine?
a. Benedict’s test
b. Acrolein test
c. Biuret test
d. Brown ring test
a. Benedict’s test
Lactose can be differentiated from fructose by:
a. Mucic acid test
b. Barfoed’s test
c. Fehling’s test
d. Iodine test
e. Tollen’s test
b. Barfoed’s test
Polymers that are responsible for the metabolic capabilities and morphology of organisms are:
a. Carbohydrates
b. Proteins
c. Polysaccharides
d. Nucleic acids
b. Proteins
The product obtained from the partial hydrolysis of collagen
a. Myosin
b. Gelatin
c. Actin
d. Fibrinogen
e. Thrombin
b. Gelatin
The main carbohydrate of the blood is:
a. D-fructose
b. D-glucose
c. Mannitol
d. Sorbitol
b. D-glucose
A normal value of glucose in the blood
a. 100 to 200 mg%
b. 80 to 120 mg%
c. 50 to 75 mg%
d. 200 to 300mg%
b. 80 to 120 mg%
Butter becomes rancid upon exposure to air due to formation of:
a. Acetic acid
b. Butyric acid
c. Formic acid
d. Propionic acid
b. Butyric acid
The cholesterol molecule is:
a. An aromatic ring
b. A straight chain acid
c. A steroid
d. Tocopherol
c. A steroid
Which of the following is a phospholipids:
a. Glycogen
b. Prostaglandin
c. Sphingomyelin
d. Oleic acid
c. Sphingomyelin
The passage of the end products of digestion from the small intestine into the blood stream
a. Metabolism
b. Digestion
c. Absorption
d. Oxidation
e. Reduction
c. Absorption
Endocrine gland that is a small oval body situated at the base of the brain
a. Hypophysis
b. Pancreas
c. Adrenal
d. None of the above
a. Hypophysis
Cellular elements of the blood devoid of nucleus
a. RBC
b. WBC
c. Thrombocytes
d. All of the above
a. RBC
Is the sum total of all activities directed towards the maintenance of life
a. Catabolism
b. Anabolism
c. Metabolism
d. Photosynthesis
e. Fermentation
c. Metabolism
This substance accumulates in the muscles as a result of vigorous exercise
a. Muscle glycogen
b. Amino acids
c. Lactic acid
d. Glucose
c. Lactic acid
A common intermediate of metabolism of carbohydrates, fatty acids, and amino acids is:
a. Glycerol
b. Acetyl CoA
c. Acetoacetate
d. Oxaloacetate
e. Acetylcholine
b. Acetyl CoA
The principal site of glucose production in the human body is the:
a. Blood
b. Liver
c. Pituitary gland
d. Small intestine
b. Liver
The major buffer of the extracellular fluid:
a. Bicarbonate-carbon dioxide
b. Amino acids
c. Phosphate
d. None of the above
a. Bicarbonate-carbon dioxide
Separates from cells when blood is coagulated
a. Fibrinogen
b. Plasma
c. Serum
d. Thrombin
e. None of the above
c. Serum
These are the glycolipids found in high concentration in the brain and nerve cells especially in the myelin sheath
a. Lecithin
b. Cephalins
c. Cerebrosides
d. Sphingolipids
c. Cerebrosides
Alcohol in the body is:
a. Oxidized to CO2 and HOH
b. Excreted mainly in the lungs
c. Excreted by the kidneys
d. Excreted by the large intestine
a. Oxidized to CO2 and HOH
Which of the following tissues contains the enzyme glucose-6-phosphatase and is able to supply glucose to the blood?
a. Heart
b. Brain
c. Liver
d. None of the above
c. Liver
Complete digestion of all foodstuffs occurs in the:
a. Large intestine
b. Stomach
c. Mouth
d. Small intestine
e. Pancreas
d. Small intestine
This compound is not a normal constituent of urine:
a. Sodium chloride
b. Albumin
c. Urea
d. Uric acid
b. Albumin
Decomposition of carbohydrates brought about by the action of enzymes liberating ethyl alcohol and carbon dioxide
a. Fermentation
b. Adsorption
c. Detoxification
d. Hydrolysis
e. Saponification
a. Fermentation
Blood clotting can be prevented by:
a. Sodium chloride
b. Potassium chloride
c. Sodium citrate
c. Sodium citrate
This hormone elevates blood sugar concentration
a. Insulin
b. Progesterone
c. Estrogen
d. Glucagons
d. Glucagons
Deficiency in this vitamins causes red blood cell fragility
a. Vitamin A
b. Vitamin K
c. Vitamin D
d. Vitamin E
d. Vitamin D
