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Level two – Semester 4 - PharmD Biochemistry-II PB-403 (Practical course) 2024/2025
4. What chemical reaction is involved in the Benzidine test for blood in
urine?
A. Urea breakdown into ammonia
B. Oxidation of benzidine into blue color
C. Reduction of nitrates into nitrites
D. Formation of acetone from fats
Answer: B. Oxidation of benzidine into blue color
5. What does a positive Jaff’s test indicate in urine?
A. The presence of indican
B. The presence of glucose
C. The presence of bile salts
D. The presence of blood
Answer: A. The presence of indican
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