MLPAO Clinical Chemistry Fundamentals

Question 1

Which enzyme is considered the most specific marker for myocardial infarction when measured in serum?

Accepted Answer

Troponin I

Answer

Creatine kinase-MB (CK-MB)

Answer

Lactate dehydrogenase (LD)

Answer

Aspartate aminotransferase (AST)

Question 2

What is the primary buffer system in human blood plasma?

Accepted Answer

Bicarbonate-carbonic acid buffer system

Answer

Phosphate buffer system

Answer

Protein buffer system

Answer

Hemoglobin buffer system

Question 3

A patient presents with a serum sodium of 128 mmol/L. Which condition is this most consistent with?

Accepted Answer

Hyponatremia

Answer

Hypernatremia

Answer

Hyperkalemia

Answer

Metabolic alkalosis

Question 4

Which method is most commonly used for measuring serum glucose in clinical chemistry analyzers?

Accepted Answer

Hexokinase method

Answer

Folin-Wu method

Answer

Ortho-toluidine method

Answer

Somogyi-Nelson method

Question 5

What does an elevated serum creatinine level primarily indicate?

Accepted Answer

Decreased glomerular filtration rate

Answer

Liver dysfunction

Answer

Muscle inflammation

Answer

Dehydration only

Question 6

Which lipoprotein is considered 'good cholesterol' due to its role in reverse cholesterol transport?

Accepted Answer

High-density lipoprotein (HDL)

Answer

Low-density lipoprotein (LDL)

Answer

Very low-density lipoprotein (VLDL)

Answer

Chylomicrons