Question

Enzymes with heme as prosthetic group are
A) Catalase
B) Carboxypeptidase
C) Succinic dehydrogenase
D) peroxidase

Answer 1

Enzymes are proteinaceous compounds which act as a biological catalyst and help in speeding up the reaction speed. They are not destroyed during the course of the reaction.

Complete answer:
Prosthetic groups are bound tightly to protein and may even be attached to a covalent bond as opposed to cosubstrates which are loosely bound. In enzymes prosthetic groups are often involved in the active site playing an important role in the function of the enzymes.

Inorganic prosthetic groups however are usually transition metal ions such as iron. The heme group is hemoglobin is the prosthetic group located in the porphyrin, which is the tremor of cyclic carbon group. It contains an organic component called protoporphyrin made up of four pyrrole rings and an iron atom in the ferrous state. Blood and muscles is attributed to the heme group.

The catalase and peroxidases, also named KatGs from the encoding katG gene, are heme-containing oxidoreductases capable of both the disproportionation of hydrogen peroxide and the oxidation of substrates via high-valent heme intermediate.

Catalase converts the hydrogen peroxide to water and triplet oxygen and peroxide catalyzes the decomposition of both hydrogen peroxide and lipid hydroperoxides.

Therefore, from the above explanation, the correct option is A) and B).

Note: Vitamins are another common prosthetic group this is the one of the reasons why vitamins are required in human diet. There are 13 vitamins which are required by the body and they are required by the body to grow and develop naturally.