which of the following metal constituents of membrane associated protein is involved in respiratory electron transport ?

1. which of the following metal constituents of membrane associated protein is involved in respiratory electron transport ?

A) Magnesium
B) Manganese
C) Iron
D) Potassium q

... Answer is C). Iron

An electron transport chain (ETC) is a series of complexes that transfer electrons from electron donors to electron acceptors via redox (both reduction and oxidation occurring simultaneously) reactions, and couples this electron transfer with the transfer of protons (H+ ions) across a membrane. This creates an electrochemical proton gradient that drives the synthesis of adenosine triphosphate (ATP), a molecule that stores energy chemically in the form of highly strained bonds. The molecules of the chain include peptides, enzymes (which are proteins or protein complexes), and others. The final acceptor of electrons in the electron transport chain during aerobic respiration is molecular oxygen although a variety of acceptors other than oxygen such as sulphate exist in anaerobic respiration.