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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