Question

Assertion Cytochrome oxidase enzyme contains copper.
Reason Cyanide combines with the copper of cytochrome oxidase and prevents oxygen combining with it.

• A. extinction of these species from other regions
• B. continental separation
• C. absence of terrestrial route to these places
• D. retrogressive evolution

Answer 1

Answer: (B)

The final stage of respiratory chain involves cytochrome oxidase which contains copper. This stage can be specifically inhibited by cyanide or carbon monoxide. Cyanide combines with the copper and prevents oxygen combining with it.