CLT Clinical Chemistry & Biochemical Analysis

Question 1

Which enzyme is most commonly measured to assess liver cell damage (hepatocellular injury)?

Accepted Answer

Alanine aminotransferase (ALT)

Answer

ALT is predominantly found in liver cells and is highly specific for hepatocellular injury, making it the primary marker for liver damage.

Question 2

A patient's serum glucose result is 52 mg/dL. Which condition does this value indicate?

Accepted Answer

Hypoglycemia

Answer

Hypoglycemia is defined as blood glucose below 70 mg/dL; a value of 52 mg/dL clearly falls into this range.

Question 3

Which specimen tube is most appropriate for serum chemistry panels?

Accepted Answer

Red or gold top (SST)

Answer

Red or gold (SST) tubes allow blood to clot and yield serum after centrifugation, which is the standard specimen for most serum chemistry panels.

Question 4

The Jaffe reaction is used in the clinical laboratory to measure which analyte?

Accepted Answer

Creatinine

Answer

The Jaffe reaction involves creatinine reacting with alkaline picrate to form an orange-red complex that is measured colorimetrically.

Question 5

Which lipoprotein is considered cardioprotective and is often called 'good cholesterol'?

Accepted Answer

High-density lipoprotein (HDL)

Answer

HDL transports cholesterol from peripheral tissues back to the liver for excretion, a process associated with reduced cardiovascular risk.

(CLT) Clinical Laboratory Technologist Certification Practice Test