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

Lipase is the preferred enzyme marker for acute pancreatitis due to its high sensitivity and specificity for pancreatic tissue damage.

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

The Jaffe reaction measures creatinine by forming a red-orange chromogen when creatinine reacts with picric acid in an alkaline solution.

Question 3

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

Accepted Answer

Phosphorylation of glucose to glucose-6-phosphate

Answer

Hexokinase catalyzes the phosphorylation of glucose using ATP to produce glucose-6-phosphate, which is then further reacted to generate a measurable signal.

Question 4

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

Accepted Answer

Anaerobic whole blood collected in heparin

Answer

Anaerobic heparinized whole blood is preferred because exposure to air increases pH, which shifts calcium binding to albumin and falsely lowers ionized calcium.

Question 5

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

Accepted Answer

Alcoholic liver disease

Answer

An AST-to-ALT ratio greater than 2:1 is a classic pattern associated with alcoholic liver disease due to alcohol-induced mitochondrial damage releasing more AST.

Medical Laboratory Technician Exam Practice Test

Medical Laboratory Technician Exam Practice Test

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