Question

Which of the elements is a component of Cytochrome oxidase
A)Copper
B)Iron
C)Mercury
D)Cobalt

Answer 1

The enzyme cytochrome oxidase or complicated IV is a massive protein complicated discovered in bacteria and eukaryotic mitochondria. It is the last enzyme in the mobile transportation chain of the respiratory electron placed in the membrane. It earns an electron out of each of four molecules of cytochrome C and converts it to one molecule of dioxygen, adding the molecular oxygen to two water molecules.

Complete answer:
Cytochrome C oxidase consists of thirteen polypeptide subunits. It includes 3 copper ions that simply are critical for its functioning.
It also includes zinc, magnesium, and two heme groups. Copper chaperones are essential for the assembling of the cytochrome c oxidase network, and abnormalities in the genes encoding such chaperones lead to multiple pathologies.

The absence of cytochrome oxidase pastime is probable to be fatal. Copper is an essential micronutrient used by cytochrome c oxidase (Cox) as a steel cofactor. Cox's key complex includes a copper atom which is wanted for its catalytic action. Complications in biogenesis and copper entry into cytochrome c in connection to mitochondrial human diseases. Cox takes place in three conformational states: totally oxidized, slightly decreased and absolutely reduced. Each inhibitor does have a sturdy affinity to some other state. Both
heme $\mathop a\nolimits_3$ and CuB nuclear centres are oxidised in the pulsed state; it really is the affirmation of the enzyme which has the maximum activity.

Hence, the correct answer is option (A)

Note: The above enzyme Cox catalyses the movement of electrons between two substrates, highly ferro cytochrome c and molecular oxygen. Much of the redox energy involved in this mechanism is being used by means of the enzyme to move protons from aqueous environment to the mitochondrial area of the intermembrane. Thus, cytochrome c oxidase is a redox-linked proton engine that integrates redox electricity to proton transportation.