Which of the following chemicals is most commonly used to preserve biological specimen?
Correct answer: A. Formalin
- A. Formalin
- B. Glutaraldehyde
- C. Ethylene Oxide
- D. Iodine
Explanation
Formalin is a solution of formaldehyde in water. It is the most common preservative used for biological specimens, as it is effective and inexpensive. Formalin preserves specimens by cross-linking proteins, which prevents them from decaying.
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