5000 Plus MCQs for Lab Technician and Technologists are designed to test the knowledge and proficiency of laboratory professionals who work in the field of clinical laboratory science. These questions cover a wide range of topics related to laboratory science, including anatomy, physiology, microbiology, chemistry, and hematology.
1001 to 1050 MCQs for Lab Technician and Technologist Exam Preparation
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Questions 1001 to 1050
The modified Griess nitrite test, when positive to any degree, is virtually diagnostic of:
- a) Phenylalanine in the urine
- b) Significant bacteriuria (105 organisms per milliliter of urine)
- c) Bilirubin in the urine
- d) Any bacteriuria (101 to 105 organisms per milliliter of urine)
According to Landsteiner, when a specific antigen is present on blood cells, the corresponding antibody:
- a) Is present in the serum
- b) Is absent from the serum
- c) May or may not be present depending on the agglutinogens present
- d) Is present in the blood cells
Carbohydrates are organic compounds of: 1. Carbon 2. Hydrogen 3. Oxygen
- a) 1 and 2 only
- b) 2 and 3 only
- c) 1, 2, and 3
- d) 1 and 3 only
The etiologic agent of chancroid is:
- a) Haemophilus aegyptius
- b) Haemophilus ducreyi
- c) Bordetella pertussis
- d) Haemophilus influenzae
Who is credited with proposing the most readily acceptable theory of ABO inheritance?
- a) Landsteiner
- b) Bernstein
- c) Levine
- d) Weiner
Blood group A individuals have:
- a) Anti-O in their serum
- b) Antigen A and B on their red cells
- c) Anti-A in their serum
- d) Anti-B in their serum
Which one of the following methods could be used to study protein abnormality?
- a) Isoenzyme electrophoresis
- b) Blood viscosity studies
- c) Electrophoresis of penicillamine-treated serum
- d) Immunoelectrophoresis
Clot retraction can be employed as an indicator of:
- a) Factor VII deficiency
- b) Platelet function
- c) Factor X deficiency
- d) Hemophilia
A trophozoite of Entamoeba histolytica usually contains:
- a) A coarse, granular, blunt pseudopod
- b) Bacteria and coarse granules in the cytoplasm
- c) Red blood cells in the cytoplasm
- d) Eccentrically located endosome in the nucleus
Cerebrospinal fluid in patients with post-cerebral hemorrhage appears:
- a) Green
- b) Bright red
- c) Clear (colorless)
- d) Light yellow or straw colored
Which stage of the coagulation process would be affected by a deficiency of Factor VIII?
- a) First
- b) Third
- c) Second
- d) Fourth
Which organisms are described as minute, very pleomorphic, sometimes coccobacillary, gram-negative rods that must have media enriched with X and V factors?
- a) Haemophilus influenzae
- b) Escherichia coli
- c) Listeria monocytogenes
- d) Bacillus anthracis
According to Landsteiner, when a specific antigen is present on blood cells, the corresponding antibody
- a) Is present in the blood cells
- b) Is present in the serum
- c) Is absent from the serum
- d) May or may not be present depending on the agglutinogens present
The screening or presumptive test for the osmotic fragility of red cells is normal when hemolysis begins in
- a) 0.50% NaCl
- b) 0.90% NaCl
- c) 1.34% NaCl
- d) 0.85% NaCl
Most methods for the determination of blood creatinine are based on the reaction of creatinine and
- a) Acetic anhydride
- b) Sulfuric acid
- c) Alkaline picrate
- d) Ammonium hydroxide
Which one of the following tests differentiates Staphylococcus aureus from other types of staphylococci?
- a) Oxidase
- b) Fibrinolysin
- c) Catalase
- d) Coagulase
Bordet-Gengou and Eugon agar base with fresh blood is used for the isolation of
- a) Yersinia
- b) Pasteurella
- c) Haemophilus
- d) Bordetella
The type of anemia usually associated with severe burns is
- a) Macrocytic
- b) Hemolytic
- c) Microcytic
- d) Aplastic
All of the following influence glomerular filtration EXCEPT
- a) Cardiac failure and renal or urinary calculi
- b) Hyperglycemia and renal tubule malfunction
- c) Renal or urinary calculi and decreased renal blood flow
- d) Decreased renal blood flow and cardiac failure
The major cation found in the extracellular fluid is
- a) Chloride
- b) Potassium
- c) Sodium
- d) Bicarbonate
On an automated blood cell counter, the two parameters affected by a high background count would be
- a) WBC and Hgb
- b) RBC and WBC
- c) Hct and WBC
- d) RBC and Hgb
To determine if a patient is A1 or A2, the blood is typed with
- a) Anti-A serum
- b) Anti-AB serum
- c) Anti-A2 serum
- d) Dolichos biflorus serum
Metabolic acidosis can be detected by testing urine for the presence of
- a) Protein
- b) Uric acid
- c) Ketone bodies
- d) Glucose
Freezing point depression measurements are part of which one of the following urine test procedures?
- a) Specific gravity
- b) Hydrometry
- c) Refractive index
- d) Osmolality
The ketone test area on a dip stick is impregnated with
- a) Alkaline copper
- b) Ferric chloride
- c) Nitroprusside
- d) 2,4 dichloraniline
When a patient has been sensitized, which of the following tests would be used to help identify the antibody that is attached to the patient’s cells IN VIVO?
- a) Indirect anti-human globulin test
- b) D(u)
- c) Direct anti-human globulin test
- d) Elution
On most automated cell counters, background counts are made using
- a) Lysing reagent only
- b) Highly-diluted blood
- c) Distilled water
- d) Diluting fluid
Beer’s law states that the darker the color produced, the more light absorbed in the specimen; the more light absorbed, the
- a) Longer the wavelength required
- b) Higher the concentration of the analyte
- c) More light transmitted
- d) Lower the concentration of the analyte
Alkaline phosphatase is GREATLY elevated in
- a) Myocardial infarction
- b) Liver disease
- c) Obstructive jaundice
- d) Kidney disease
Osmolality of a solution is determined by measuring
- a) Ionic strength
- b) Refractive index
- c) Freezing point depression
- d) Specific gravity
The egg of the Schistosoma characterized by a pronounced lateral spine is
- a) Schistosoma haematobium
- b) Schistosoma hepatica
- c) Schistosoma japonicum
- d) Schistosoma mansoni
Reticulocytes contain
- a) Howell-Jolly bodies
- b) DNA remnants
- c) Basophilic granules
- d) RNA remnants
Enterobius vermicularis is a
- a) Flat worm
- b) Filarial worm
- c) Hookworm
- d) Pinworm
Streptococcus pneumoniae
- a) Capsules are produced by virulent strains
- b) Is motile
- c) Is consistently gram-positive even in old cultures
- d) Grows best at slightly acid pH
The end-product of purine metabolism is
- a) Creatinine
- b) Uric acid
- c) Creatine
- d) Urea
Which one of the following methods could be used to study protein abnormality?
- a) Immunoelectrophoresis
- b) Isoenzyme electrophoresis
- c) Electrophoresis of penicillamine-treated serum
- d) Blood viscosity studies
Sodium is responsible for the maintenance of
- a) Cardiac muscle contractions
- b) Blood coagulation
- c) Salt intake
- d) Osmotic pressure of body fluids
In serologic tests for syphilis, reagin reactivity may result from an acute or chronic infection such as
- a) Infectious hepatitis
- b) Pneumonia
- c) Helicobacter pylori
- d) Lupus erythematosus
A variety of media may be safely stored for months if care is taken to
- a) Maintain them in an incubator
- b) Avoid exposing them to light
- c) Maintain them at room temperature
- d) Retain their moisture
Which of the following tests is specific for urinary glucose?
- a) Pandy
- b) Benedict’s
- c) Clinitest
- d) Dip stick
The cystic stage of development has NOT been demonstrated in which of the following organisms?
- a) Iodamoeba butschlii
- b) Balantidium coli
- c) Endolimax nana
- d) Trichomonas vaginalis
The distance between the ruled surface and cover slip of the hemacytometer is
- a) 1.0 mm
- b) 0.1 cm
- c) 0.1 mm
- d) 1.0 cm
Which one of the following hemoglobin determination methods is recommended by the International Committee for Clinical Laboratory Standards and the National Committee for Clinical Laboratory Standards?
- a) Methemoglobin
- b) Oxyhemoglobin
- c) Sulfhemoglobin
- d) Cyanmethemoglobin
The ketone bodies include acetoacetic acid, acetone, and
- a) Lactic acid
- b) 3-hydroxy butyric acid
- c) Acetic acid
- d) Oxaloacetic acid
In Taenia saginata, the larval stage develops in
- a) Cattle
- b) Fish
- c) Swine
- d) Man
Rh immune globulin is given to an Rh (D)
- a) Positive mother who has an Rh(D) negative husband
- b) Negative mother who has delivered an Rh(D) positive fetus
- c) Negative mother with an Rh(D) negative fetus
- d) Positive mother with an Rh(D) negative fetus
If test results are within +/-2 standard deviations, the ratio of test results beyond the +/-2 SD limit will be 1 out of
- a) 20
- b) 3
- c) 5
- d) 300
Fungi are commonly identified on their basis of their
- a) Serologic and biochemical characteristics
- b) Staining properties with polychrome dyes
- c) Sporulation and the arrangement of spores on the hyphae
- d) Solubility in 20% potassium hydroxide
During the maturation of a blood cell, the nuclear chromatin pattern becomes
- a) More dense
- b) Less dense
- c) Finer
- d) More acidic
The degree that a procedure deviates from a known value or from a calculated mean value is known as
- a) Percent deviation
- b) Standard deviation
- c) Quality control
- d) Coefficient variation
Answer Key Summary
The questions are typically designed to assess the technical skills and knowledge required for the laboratory profession, including the ability to analyze laboratory test results, perform laboratory procedures, and maintain laboratory equipment.
To prepare for these MCQs, candidates should have a thorough understanding of the key concepts and principles of laboratory science. They should also be familiar with common laboratory equipment and procedures, as well as laboratory safety protocols.
Candidates may also benefit from studying specific laboratory science textbooks or taking online courses that cover the material tested in the MCQs. Additionally, practicing sample MCQs and reviewing the answers can help candidates identify areas where they may need to improve their knowledge or skills.
Overall, the MCQs for lab technologists are designed to be challenging and comprehensive, requiring candidates to demonstrate a high level of proficiency in the field of laboratory science.
