Medical Laboratory Technician Exam FREE Medical Laboratory Technician Clinical Chemistry Procedures Questions and Answers 2

Question 1

Which enzyme is most commonly measured to assess acute pancreatitis in clinical chemistry?

Accepted Answer

Lipase

Answer

Alkaline phosphatase

Answer

Creatine kinase

Answer

Lactate dehydrogenase

Question 2

What is the principle behind the Jaffe reaction used in clinical chemistry laboratories?

Accepted Answer

Creatinine reacts with alkaline picrate to form a red-orange complex

Answer

Glucose is oxidized by glucose oxidase

Answer

Urea is hydrolyzed by urease

Answer

Bilirubin reacts with diazo reagent

Question 3

In the enzymatic method for glucose measurement, what does hexokinase catalyze?

Accepted Answer

Phosphorylation of glucose to glucose-6-phosphate

Answer

Oxidation of glucose to gluconic acid

Answer

Reduction of NAD+ to NADH directly

Answer

Conversion of glucose to fructose

Question 4

Which specimen type is preferred for measuring ionized calcium in clinical chemistry?

Accepted Answer

Anaerobic whole blood collected in heparin

Answer

Serum separated after 2 hours

Answer

EDTA plasma

Answer

Citrated plasma

Question 5

What does an elevated serum AST-to-ALT ratio greater than 2:1 typically suggest?

Accepted Answer

Alcoholic liver disease

Answer

Viral hepatitis

Answer

Obstructive jaundice

Answer

Hemolytic anemia

Question 6

Which electrolyte measurement is most affected by hemolysis of a blood specimen?

Accepted Answer

Potassium

Answer

Sodium

Answer

Chloride

Answer

Bicarbonate