Question
Urea Nitrate crystal test for urine produces _________ type of crystals
| A. |
Hexagonal
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| B. |
Needle-shaped
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| C. |
Star shaped
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| D. |
Flattened
|
Show Answer
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Correct Answer � A
Explanation
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|
Ans.A. Hexagonal
Urea Nitrate Crystal Test – Add a drop of conc HNO3 and cover , hexagonal stacked crystals of Urea nitrate seen .
Creatinine Test – stain on filter paper, add a drop of picric acid followed by a drop of 5% NaOH, Brown/orange color
Medico Legal Importance
• Identification – DNA analysis of the endothelial cells of urine stain
• Sex determination – Barr body examination in these endothelial cells
• Urine stains on a particular place – connect the person with the scene of crime
