Saliva Urine Feces & Vaginal Fluid Analysis MCQ Quiz | Forensic Sciences

Welcome, future medical professionals! This comprehensive quiz is designed to test your knowledge on the forensic analysis of key biological fluids: saliva, urine, feces, and vaginal fluid. As an essential part of forensic medicine, understanding the presumptive and confirmatory tests, key biochemical markers, and the evidentiary value of these samples is crucial. This quiz contains 25 multiple-choice questions tailored to the MBBS curriculum to help you solidify your understanding and prepare for examinations. After completing the quiz, you can review your score, see the correct answers highlighted, and assess your performance. You can also download all the questions with their correct answers in a convenient PDF format for your future reference and revision. Good luck!

1. The Phadebas test is a presumptive test for saliva that detects the activity of which enzyme?

2. The Jaffe test is used for the detection of which compound, a key indicator of urine?

3. The presence of glycogenated squamous epithelial cells is a strong indicator of which body fluid?

4. Which of the following tests is used to visualize glycogen in vaginal epithelial cells, causing them to stain a magenta color?

5. The detection of stercobilin is indicative of which bodily substance?

6. RSID (Rapid Stain Identification) tests are what type of test?

7. A urine stain is suspected on a dark fabric. Which tool would be most helpful for preliminary visualization at a crime scene?

8. In the starch-iodine test for saliva, a positive result (presence of amylase) is indicated by:

9. The Lugol’s iodine test identifies glycogen in vaginal cells by staining it what color?

10. The presence of urea can be presumptively tested for using an enzyme that breaks it down into ammonia and carbon dioxide. What is this enzyme?

11. What is the primary challenge associated with DNA analysis of fecal matter?

12. Which of the following is NOT a typical component looked for in the microscopic examination of feces for forensic purposes?

13. Which human-specific glycoprotein is targeted by the RSID-Saliva test?

14. Thymolphthalein monophosphate is a substrate used in a colorimetric assay to detect which enzyme, commonly found in seminal fluid but also at lower levels in vaginal fluid?

15. The presence of Tamm-Horsfall protein (THP) is a highly specific indicator for which body fluid?

16. Edelman’s test, which produces a green fluorescence with zinc salts in an alcoholic solution, is used to detect:

17. Which of these fluids is least likely to yield a full DNA profile due to a typically low concentration of nucleated cells?

18. The Dane’s method or “pith and plaster” method is historically associated with the collection of which biological sample?

19. The concentration of glycogen in vaginal epithelial cells is primarily regulated by which hormone?

20. What is a significant limitation of using alpha-amylase tests for saliva identification?

21. The detection of D-amino acid oxidase activity has been proposed as a method to identify which body fluid?

22. Which of the following is a confirmatory test for urine?

23. In cases of sexual assault, the persistence of seminal components is often compared with the persistence of vaginal components. Which of the following is an endogenous component of vaginal secretions?

24. A stain is found on an envelope flap. Which test would be most appropriate as a first step to identify the potential biological fluid?

25. What is the primary reason for using a control swab when collecting a biological stain from a surface?

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