Which one of the following is a coenzyme?

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(D) Coenzymes are organic non-protein cofactors that bind loosely to an enzyme and are essential for its catalytic activity. Many vitamins or their de

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(D) Coenzymes are organic non-protein cofactors that bind loosely to an enzyme and are essential for its catalytic activity. Many vitamins or their derivatives function as coenzymes. $A$. Nicotinamide is a component of $NAD^+$ and $NADP^+$,which are essential coenzymes. $B$. Riboflavin (Vitamin $B_2$) is a precursor for $FMN$ and $FAD$,which act as coenzymes. $C$. Pantothenic acid (Vitamin $B_5$) is a precursor for Coenzyme $A$ $(CoA)$. Since all the listed substances are precursors or components of essential coenzymes,the correct answer is $D$.

Column-$I$ (Enzymes)	Column-$II$ (Co-factors)
$P$. Catalase,Peroxidase	$I$. $Fe$
$Q$. Carboxypeptidase	$II$. $NAD$
$R$. Alcohol dehydrogenase	$III$. $Zn$

Similar Questions

Statement $P$: Coenzymes are larger molecules compared to the protein part of enzymes.
Statement $Q$: Since the enzyme is inactive without the coenzyme,it forms the active site.

What are organic compounds called when they are tightly bound to the apoenzyme?

If ......... are loosely associated with the .........,they are called co-enzymes.

Match the following columns:

Column-$I$ (Enzymes) Column-$II$ (Co-factors)

$P$. Catalase,Peroxidase $I$. $Fe$

$Q$. Carboxypeptidase $II$. $NAD$

$R$. Alcohol dehydrogenase $III$. $Zn$

What are the types of co-factors?

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