Student Question Bank Chapter 33: Textbook Clinical Chemistry Principles, Techniques, And Correlations 7th Edition Exam Questions (9 Terms) With Verified Definitions Updated 2024

5.The most commonly used method for determination of vitamin B12 is a. Competitive protein-binding RIA b. Chemiluminescence assay c. Magnetic separation immunoassay d. HPLC {Ans: a. Competitive protein-binding RIA}4. A 70-year-old man presented to his physician with a broken arm. Laboratory work indicated an elevated prothrombin time, with all other labora- tory results being normal. The man was also taking an antibiotic for an earlier respiratory infection. Which, if any, of the following vitamins might be involved? a. Vitamin K b. Vitamin D c. Biotin d. None of these {Ans: a. Vitamin K}9. Laboratory monitoring of the patient on TPN therapy is important to avoid possible complications. Which of the following trace elements should be monitored on a weekly basis? a. Copper b. Selenium c. Molybdenum d. Chromium {Ans: a. Copper}1. Which of the following describes the correct source, function, and deficient state of the vitamin listed? a. Thiamine (B1)—whole grains, carbohydrate metabolism, beriberi b. Vitamin E—plant tissues, antioxidant, osteo- malacia c. Niacin—meat, oxidation-reduction reactions, scurvy d. Folic acid—dairy products, myelin formation {Ans: a. Thiamine (B1)—whole grains, carbohydrate metabolism, beriberi}8. Which of the following nutritional markers has been found to be the most sensitive and helpful