- AAn enzyme
- BA carbohydrate
- CAn amino acid
- DA nitrogenous base
Explanation:
Explanation of the correct option:
Enzymes are naturally occurring simple or conjugate proteins acting as specific catalysts in cell processes.
The enzyme facilitates a biochemical reaction by providing alternative lower activation energy pathways thereby increasing the rate of reaction.
Hence they are called biological catalysts.
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$A.$ $E _{\text {cell }}$ is an intensive parameter.
$B.$ A negative $E^{\Theta}$ means that the redox couple is a stronger reducing agent than the $H ^{+} / H _2$ couple.
$C.$ The amount of electricity required for oxidation or reduction depends on the stoichiometry of the electrode reaction.
$D.$ The amount of chemical reaction which occurs at any electrode during electrolysis by a current is proportional to the quantity of electricity passed through the electrolyte.