Medical Laboratory Technician Exam FREE ASCP Medical Laboratory Technician Questions and Answers 3

Question 1

Which staining technique is used to identify acid-fast bacilli such as Mycobacterium tuberculosis?

Accepted Answer

Ziehl-Neelsen stain

Answer

The Ziehl-Neelsen (carbol fuchsin) stain uses heat to drive the dye into the waxy mycolic acid cell wall, making acid-fast bacilli appear red against a blue background.

Question 2

A blood bank technologist identifies an antibody that reacts at 37 degrees C and in the antiglobulin phase. The antibody shows dosage and is destroyed by enzyme treatment of reagent cells. Which antibody is most likely?

Accepted Answer

Anti-Fya

Answer

Anti-Fya is a clinically significant IgG antibody that reacts at 37 degrees C and AHG phase, demonstrates dosage, and is characteristically destroyed by enzyme treatment.

Question 3

What is the primary purpose of performing a differential white blood cell count on a peripheral blood smear?

Accepted Answer

To classify and quantify the types of white blood cells present

Answer

The differential count classifies leukocytes into their specific types (neutrophils, lymphocytes, monocytes, eosinophils, basophils) and identifies any abnormal cells.

Question 4

An elevated serum creatine kinase-MB (CK-MB) level combined with a significantly elevated troponin I is most indicative of which condition?

Accepted Answer

Acute myocardial infarction

Answer

The combination of elevated CK-MB and troponin I is highly specific for acute myocardial infarction, as both are released from damaged cardiac muscle tissue.

Question 5

Which specimen collection tube contains the anticoagulant EDTA and is used for complete blood count testing?

Accepted Answer

Lavender (purple) top

Answer

Lavender or purple-top tubes contain EDTA, which chelates calcium to prevent clotting and preserves cell morphology, making them standard for CBC testing.

Medical Laboratory Technician Exam Practice Test

Medical Laboratory Technician Exam Practice Test

Medical Laboratory Technician Exam FREE ASCP Medical Laboratory Technician Questions and Answers 3