Medical Laboratory Technician Exam FREE Medical Laboratory Technician MCQ Questions and Answers 2

Question 1

Which anticoagulant is found in a lavender-top blood collection tube?

Accepted Answer

EDTA

Answer

Lavender-top tubes contain EDTA, which is the preferred anticoagulant for complete blood count testing.

Question 2

What is the primary stain used to differentiate gram-positive from gram-negative bacteria?

Accepted Answer

Gram stain

Answer

The Gram stain uses crystal violet and safranin to classify bacteria based on cell wall composition.

Question 3

A patient's blood glucose level is 250 mg/dL with ketonuria present. Which condition is most likely?

Accepted Answer

Diabetic ketoacidosis

Answer

Elevated blood glucose combined with ketonuria is characteristic of diabetic ketoacidosis.

Question 4

Which electrolyte imbalance is most commonly associated with hemolyzed blood specimens?

Accepted Answer

Falsely elevated potassium

Answer

Hemolysis releases intracellular potassium into the serum, causing a falsely elevated potassium result.

Question 5

What does an elevated erythrocyte sedimentation rate (ESR) primarily indicate?

Accepted Answer

Inflammation

Answer

An elevated ESR is a nonspecific marker of inflammation caused by increased fibrinogen and immunoglobulins.

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