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[A] : The enzyme reacts with the substra...

[A] : The enzyme reacts with the substrate forming an enzyme substrate intermediary complex .
[R] : The poisoning of any single enzyme involved in a main metabolic chain will make the whole chain inoperative .

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 and R is false

D

If both A and R are false

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