This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Forensic Toxicology - Concepts, Statutes, Evidence, and Techniques, Subject name: Forensic Medicine
Mechanism of cyanide poisoning is by inhibiting - 
Select and explain. 
A. DNA synthesis, B. Cytochrome oxidase, C. Protein breakdown, D. Protein synthesis
B: Cytochrome oxidase
Answer: B: Cytochrome oxidase 
Explanation: Ans. is 'b' i.e., Cytochrome oxidase o Cyanide inhibits cytochrome oxidase for oxygen utilisation in cells,o Death is due to cytotoxic/ histotoxic anoxia,o It is associated with a characteristic smell of bitter almonds.