Question
Urea Nitrate crystal test for urine produces _________ type of crystals
| A. |
Hexagonal |
| B. |
Needle-shaped |
| C. |
Star shaped |
| D. |
Flattened |
Show Answer
|
Correct Answer � A Explanation |
 |
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