Clinical Chem Test Bank (Final Exam)

6. Which of the following cytochromes plays a major role in the metabolism of drugs in the liver? A. Cytochrome P650 B. Cytochrome P490 C. Cytochrome P250 D. Cytochrome P450 {Ans: D. Cytochrome P450}2. Which of the following is FALSE about PSA? A. It is a single-chain glycoprotein B. It is used as a tumor marker C. It is not elevated in benign prostatic hyperplasia D. It is quantified in serum by immunoassays {Ans: C. It is not elevated in benign prostatic hyperplasia.}3. The enzyme system that catalyzes the conjugation of bilirubin is known as: a. Leucine aminopeptidase. b. Glucose-6-phosphate dehydrogenase. c. Uridine diphosphate (UDP) glucoronyl transferase. d. Carbamyl phosphate synthetase. e. Lactate dehydrogenase. {Ans: c. Uridine diphosphate (UDP) glucoronyl transferase.}24. Which of the following instruments can measure calcium, magnesium, and phosphorus in blood samples? A. Fluorometer B. Osmometer C. Atomic absorption spectrometer D. Refractometer {Ans: C. Atomic absorption spectrometer}9. The reason that carbon monoxide is so toxic is because it: A Is a protoplasmic poison. B. Combines with cytochrome oxidase. C. Has 200-250 times the affinity of oxygen for hemoglobin binding sites. D. Sensitizes the myocardium. {Ans: C. Has 200-250 times the affinity of