Page 27 - Practical Handout bio 2 mnu 2025_Neat
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Level two – Semester 4 - PharmD Biochemistry-II PB-403 (Practical course) 2024/2025
What happens to the pH of urine if it is left standing at room
temperature?
o It decreases
o It remains stable
o It increases due to ammonia production
o It becomes neutral
• Answer: C. It increases due to ammonia production
What is a common avoidable cause of hemolysis in blood samples?
o Intravascular hemolysis
o Vigorous inversion of the sample
o Collecting blood into the wrong tube
o Plasma separation within 1 hour
• Answer: B. Vigorous inversion of the sample
What is the recommended storage condition for urine samples that
cannot be tested within 2 hours?
o Freeze at -20°C
o Store at room temperature
o Refrigerate at 4–6°C
o Keep in direct sunlight
• Answer: C. Refrigerate at 4–6°C
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