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Cyanide kills animlas by inhibiting cyt...

Cyanide kills animlas by inhibiting cytochrome oxidase (an enzyme of respiration) by binding irreversibly with copper. It does not bind with active site. This is an example of

A

competitive inhinition

B

non competitive inhibition

C

feed back inhibition

D

all of the above

Text Solution

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The correct Answer is:
B
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Inhibitors that bind with enzyme at active site are -

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

Knowledge Check

  • Cyanide causes irreversibe inhibition of cytochrome oxidase. It

    A
    Combines with an amino acid
    B
    Destroys tertiary structure
    C
    Attaches to copper
    D
    All the above.

  • Substrates bind to the active sites of an enzyme by interaction like

    A
    Ionic bonding
    B
    Hydrogen bonding
    C
    Vander Waal's interactions
    D
    All

  • Assertion. Cytochrome oxidase enzyme contains copper. Reason. Cyanide combines with the copper of cytochrome oxidase and prevents O_(2) combining with it.

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

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