Which of the following is false?
Enzymes that require metal ion cofactor are termed metal activated enzymes,whereas enzymes for which metal ions serve as prosthetic groups are termed as metalloenzymes. If a metal is tightly bound to an enzyme(prosthetic group),it is called metalloenzyme, while an enzyme(without the metal ion)showing enhanced activity on the addition pf a metal ion(co factor)is called as metal ion activated enzyme/metal activated enzyme. Metalloenzymes:Cytochromes(Fe,Cu),aldehyde oxidase(Mo),catechol oxidasse(Cu),Carbonic anhydrase(Zn). Cofactors: A cofactor is a non protein chemical compound or metallic ion that is required for an enzymes activity. cofactor bind in a transient,dissociable manner to enzymes.Therefore,unlike associated prosthetic groups,cofactors must be present in the medium surrounding the enzyme for catalysis to occur. The most common cofactors are metal ions Reference: Harpers illustrated biochemistry 31st edition pg 58
Cofactors have functions similar to those of prosthetic groups.
Cofactors bind in a transient,dissociable manner to enzymes
The most common cofactors are metal ions
Enzymes that require metal ion cofactors are termed as metalloenzymes
Enzymes