Question
Biology Question on Essential Mineral Elements
Mineral associated with cytochrome is
A
Cu
B
Mg
C
CuandMg
D
Fe.
Answer
Fe.
Explanation
Solution
Cytochromes are generally membrane-bound hemoproteins that contain heme groups and carry out electron transport. The heme group is a highly conjugated ring system (which means its electrons are very mobile) surrounding a metal ion, which readily interconverts between the oxidation states. For many cytochromes the metal ion present is that of iron, which interconverts between Fe (reduced) and Fe (oxidized) states (electron-transfer processes) or between Fe (reduced) and Fe (formal, oxidized) states (oxidative processes). Cytochromes are thus capable of performing oxidation and reduction.