Cyanide kills an animal by:

Killing the brain cells

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Competitive inhibitor of enzyme cytochrome oxidise

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Killing the cells of cardiac muscles

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Inhibiting cytochrome oxidase, a mitochondrial enzyme essential for cellular respiration by non-competitive inhibition

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Solution

The correct option is D Inhibiting cytochrome oxidase, a mitochondrial enzyme essential for cellular respiration by non-competitive inhibition
The cyanide anion is an inhibitor of the enzyme cytochrome c oxidase in a non competitive manner. It acts as an irreversible enzyme inhibitor, preventing cytochrome c oxidase from performing it's function. Therefore, ATP is not produced.

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