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.
1101 to 1150 MCQs for Lab Technician and Technologist Exam Preparation
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Questions 1101 to 1150
The nanometer is used as a measure of?
- a) Absorbance
- b) % transmittance
- c) Intensity of radiant energy
- d) Wavelength of radiant energy
A common cause of respiratory alkalosis is?
- a) Vomiting
- b) Starvation
- c) Asthma
- d) Hyperventilation
Major actions of angiotensin II include?
- a) Increased pituitary secretion of rennin
- b) Increased vasoconstriction
- c) Increased parathyroid hormone secretion by the parathyroid
- d) Decreased adrenal secretion of aldosterone
The anion gap is useful for QC of laboratory results for?
- a) Amino acids and proteins
- b) Blood gas analyses
- c) Sodium, potassium, chloride, and total CO2
- d) Calcium, phosphorus, and magnesium
Which of the following electrolytes is the chief plasma cation whose main function is maintaining osmotic pressure?
- a) Chloride
- b) Calcium
- c) Potassium
- d) Sodium
What is the molarity of a solution that contains 18.7 g of KCl (MW = 74.5) in 500 ml of water?
- a) 0.1
- b) 0.5
- c) 1.0
- d) 5.0
The buffering capacity of blood is maintained by a reversible exchange process between bicarbonate and?
- a) Sodium
- b) Potassium
- c) Calcium
- d) Chloride
The different water content of erythrocytes and plasma makes true glucose concentrations in whole blood a function of the?
- a) Hematocrit
- b) Leukocyte count
- c) Erythrocyte count
- d) Erythrocyte indices
Acidosis and alkalosis are best defined as fluctuations in blood pH and CO2 content due to changes in?
- a) Bohr’s effect
- b) O2 content
- c) Bicarbonate buffer
- d) Carbonic anhydrase
Metabolic acidosis is described as a(n)?
- a) Increase in CO2 content and PCO2 with a decreased pH
- b) Decrease in CO2 content with an increased pH
- c) Increase in CO2 with an increased pH
- d) Decrease in CO2 content and PCO2 with a decreased pH
The normal range for the pH of arterial blood measured at 37 degrees Celsius is?
- a) 7.28-7.34
- b) 7.33-7.37
- c) 7.35-7.45
- d) 7.45-7.50
Hydrogen ion concentration (pH) in blood is usually determined by means of which of the following electrodes?
- a) Silver
- b) Glass
- c) Platinum
- d) Platinum-lactate
The conversion of glucose or other hexoses into lactate or pyruvate is called?
- a) Glycogenesis
- b) Glycogenolysis
- c) Gluconeogenesis
- d) Glycolysis
A reciprocal relationship exists between?
- a) Sodium and potassium
- b) Calcium and phosphorus
- c) Chloride and CO2
- d) Calcium and magnesium
Respiratory acidosis is described as a(n)?
- a) Increase in CO2 content and PCO2 with a decreased pH
- b) Decrease in CO2 content with an increased pH
- c) Increase in CO2 content with an increased pH
- d) Decrease in CO2 content and PCO2 with a decreased pH
Which of the following hemoglobins has glucose-6-phosphate on the amino-terminal valine of the beta chain?
- a) S
- b) C
- c) A2
- d) A1C
The function of the major lipid components of the very low density lipoproteins (VLDL) is to transport?
- a) Cholesterol from peripheral cells to the liver
- b) Cholesterol and Phospholipids to peripheral cells
- c) Exogenous triglycerides
- d) Endogenous triglycerides
A hospitalized patient is experiencing increased neuromuscular irritability (tetany). Which of the following tests should be ordered immediately?
- a) Calcium
- b) Phosphorus
- c) BUN
- d) Glucose
Sixty to seventy-five percent of the plasma cholesterol is transported by?
- a) Chylomicrons
- b) VLDL
- c) LDL
- d) HDL
Measurement of total T4 by competitive protein binding or displacement is based on the specific binding properties of?
- a) Thyroxine-binding prealbumin
- b) Albumin
- c) Thyroxine-binding globulin
- d) Thyroid-stimulating hormone
Which of the following methods employs a highly specific antibody to thyroxine?
- a) Total T4 by competitive protein binding
- b) T4 by RIA
- c) T4 by column
- d) T4 by equilibrium dialysis
The extent to which measurements agree with the true value of the quantity being measured is known as?
- a) Reliability
- b) Accuracy
- c) Reproducibility
- d) Precision
When myocardial infarction occurs, the first enzyme to become elevated is?
- a) CK
- b) LD
- c) AST
- d) ALT
In the Jaffe reaction, creatinine reacts with?
- a) Alkaline sulfasalazine solution to produce an orange-yellow complex
- b) Potassium iodide to form a reddish-purple complex
- c) Sodium nitroferricyanide to yield a reddish-brown color
- d) Alkaline picrate solution to yield an orange-red complex
Which of the following represents the end product of purine metabolism in humans?
- a) AMP and GMP
- b) DNA and RNA
- c) Allantoin
- d) Uric acid
The biologically most active, naturally occurring androgen is?
- a) Androstenedione
- b) Dehydroepiandrosterone
- c) Epiandrosterone
- d) Testosterone
Bile acid concentrations are useful to assess?
- a) Diabetes mellitus
- b) Hepatobiliary disease
- c) Intestinal Malabsorption
- d) Kidney function
Which of the following is secreted by the placenta and used for the early detection of pregnancy?
- a) Follicle-stimulating hormone (FSH)
- b) Human Chorionic gonadotropin (HCG)
- c) Luteinizing hormone (LH)
- d) Progesterone
Decreased serum iron associated with increased TIBC is compatible with which of the following disease states?
- a) Anemia of chronic infection
- b) Iron deficiency anemia
- c) Chronic liver disease
- d) Nephrosis
The principal excretory form of nitrogen is?
- a) Amino acids
- b) Creatinine
- c) Urea
- d) Uric acid
The parent substance in the biosynthesis of androgens and estrogens is:
- a) Cortisol
- b) Catecholamines
- c) Progesterone
- d) Cholesterol
In the Malloy and Evelyn method for the determination of bilirubin, the reagent that is reacted with bilirubin to form a purple azobilirubin is:
- a) Dilute sulfuric acid
- b) Diazonium sulfate
- c) Sulfobromophthalein
- d) Diazotized sulfanilic acid
Maple syrup urine disease is characterized by an increase in which of the following urinary amino acids?
- a) Phenylalanine
- b) Tyrosine
- c) Valine, leucine, and isoleucine
- d) Cystine and cysteine
Which of the following enzymes catalyzes the conversion of starch to glucose and maltose?
- a) Malate dehydrogenase (MD)
- b) Amylase (AMS)
- c) Creatine kinase (CK)
- d) Isocitric dehydrogenase (ICD)
The greatest activities of serum AST and ALT are seen in?
- a) Acute hepatitis
- b) Primary Biliary cirrhosis
- c) Metastatic hepatic carcinoma
- d) Alcoholic cirrhosis
Bioavailability of a drug refers to the?
- a) Availability for therapeutic administration
- b) Availability of the protein-bound fraction of the drug
- c) Drug transformation
- d) The fraction of the drug absorbed into the systemic circulation
The cyclic antidepressants are classified as?
- a) Basic drugs
- b) Neutral drugs
- c) Acidic Drugs
- d) Structurally cycloparaffinic
The most widely employed screening technique for drug abuse is?
- a) High performance liquid chromatography
- b) Gas liquid chromatography
- c) Thin layer chromatography
- d) UV spectrophotometry
Phenobarbital is a metabolite of?
- a) Primidone
- b) Phenytoin
- c) Amobarbital
- d) Secobarbital
Increased serum albumin concentrations are seen in which of the following conditions?
- a) Nephrotic syndrome
- b) Acute hepatitis
- c) Chronic inflammation
- d) Dehydration
Which of the following amino acids is associated with sulfhydryl group?
- a) Cysteine
- b) Glycine
- c) Serine
- d) Tyrosine
Night blindness is associated with deficiency of which of the following vitamins?
- a) A
- b) C
- c) Niacin
- d) Thiamine
Scurvy is associated with deficiency of which of the following vitamins?
- a) A
- b) C
- c) Niacin
- d) Thiamine
A cardiac glycoside that is used in the treatment of congenital heart failure and arrhythmias by increasing the force and velocity of myocardial contraction is?
- a) Digoxin
- b) Acetaminophen
- c) Lithium
- d) Phenytoin
Pellagra is associated with deficiency of which of the following vitamins?
- a) A
- b) C
- c) Niacin
- d) Thiamine
A drug that relaxes the smooth muscles of the bronchial passages is?
- a) Acetaminophen
- b) Lithium
- c) Phenytoin
- d) Theophylline
Which of the following is the formula for calculating the unknown concentration based on Beer’s Law (A= absorbance, C= Concentration)?
- a) (A unknown/A standard) x C standard
- b) C standard x A unknown
- c) A standard x A unknown
- d) (C standard)/(A standard) x 100
Which of the following is the formula for coefficient of variation?
- a) (standard deviation x 100)/standard error
- b) (mean x 100)/standard deviation
- c) (standard deviation x 100)/mean
- d) (variance x 100)/mean
Rickets is associated with deficiency in which of the following vitamins?
- a) A
- b) C
- c) Niacin
- d) D
The regulation of calcium and phosphorus metabolism is accomplished by which of the following glands?
- a) Thyroid
- b) Parathyroid
- c) Adrenal glands
- d) Pituitary
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.
