Assertion: Cytochrome oxidase enzyme contian copper.
Cyanide combines with copper of cytochrome oxidase and prevents oxygen combining with it

Options

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C. If the assertion is true but the reason is false
D. If both the assertion and reason are false

Answer

B

Explanation

The last step of electron transport chain involves cytochrome c oxides complex containing cytochrome a and 3 a two copper centers are referred to as complex
IV. Oxygen act as a terminal electron acceptor. It becomes reactive and combines with protons to form water.
Cyanide function as an inhibitor that combines with copper and prevents oxygen from combining with it.