ASCP Clinical Chemistry 3

Question 1

Phenylketonuria (PKU) is detected by measuring elevated levels of which metabolite?

Accepted Answer

Phenylalanine

Answer

Tyrosine

Answer

Homocysteine

Answer

Methionine

Question 2

Which tumor marker is most useful for monitoring treatment response in prostate cancer?

Accepted Answer

PSA

Answer

CA-125

Answer

AFP

Answer

CEA

Question 3

The reference method for cholesterol measurement uses which technique?

Accepted Answer

Abell-Kendall method with Liebermann-Burchard reagent

Answer

Enzymatic colorimetric assay

Answer

Ion-selective electrode

Answer

Turbidimetry

Question 4

Which enzyme deficiency causes phenylketonuria?

Accepted Answer

Phenylalanine hydroxylase

Answer

Tyrosine hydroxylase

Answer

Homogentisate oxidase

Answer

Cystathionine synthase

Question 5

A serum sodium of 118 mEq/L is classified as:

Accepted Answer

Severe hyponatremia

Answer

Mild hyponatremia

Answer

Moderate hyponatremia

Answer

Normal sodium

Question 6

Which test distinguishes prerenal azotemia from intrinsic renal failure?

Accepted Answer

BUN/creatinine ratio

Answer

Serum creatinine alone

Answer

Urine specific gravity alone

Answer

Serum potassium