Which of the following is a co-enzyme?

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(B) Co-enzymes are organic compounds that bind to apoenzymes to facilitate catalytic activity. $NAD$ (Nicotinamide Adenine Dinucleotide) is a well-kno

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$NAD$

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(B) Co-enzymes are organic compounds that bind to apoenzymes to facilitate catalytic activity. $NAD$ (Nicotinamide Adenine Dinucleotide) is a well-known co-enzyme that acts as an electron carrier in metabolic reactions. $Fe^{+2}$ is a metal ion cofactor. Lyases are a class of enzymes,not co-enzymes. $ATP$ is an energy currency molecule,not a co-enzyme.

Column-$I$ (Enzymes)	Column-$II$ (Cofactors/Activators)
$P$. Catalase	$I$. Molybdenum
$Q$. Carboxylase	$II$. Zinc
$R$. Nitrogenase,Nitrate reductase	$III$. Iron

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Match the following columns:

Column-$I$ (Enzymes) Column-$II$ (Cofactors/Activators)

$P$. Catalase $I$. Molybdenum

$Q$. Carboxylase $II$. Zinc

$R$. Nitrogenase,Nitrate reductase $III$. Iron

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