fadh2 is the last electron acceptor of the electron transport chain (etc) in cellular respiration.
fadh2 is the last electron acceptor of the electron transport chain (etc) in cellular respiration.
the last electron acceptor of the electron transport chain (etc) in cellular respiration is?
fadh2
an exoelectrogen normally refers to a microorganism that has the ability to transfer electrons extracellularly. while exoelectrogen is the predominant name, other terms have been used: electrochemically active bacteria, anode respiring bacteria, and electricigens. electrons exocytosed in this fashion are produced following atp production using an electron transport chain (etc) during oxidative phosphorylation. conventional cellular respiration requires a final electron acceptor to receive these electrons. cells that use molecular oxygen (o) as their final electron acceptor are described as using aerobic respiration, while cells that use other soluble compounds as their final electron acceptor are described as using anaerobic respiration. however, the final electron acceptor of an exoelectrogen is found extracellularly and can be a strong oxidizing agent in aqueous solution or a solid conductor/electron acceptor. two commonly observed acceptors are iron compounds (specifically fe(iii) oxides) and manganese compounds (specifically mn(iii/iv) oxides). as oxygen is a strong oxidizer, cells are able to do this strictly in the absence of oxygen.
exoelectrogen
the potential of nadh and fadh is converted to more atp through an electron transport chain with oxygen as the "terminal electron acceptor". most of the atp produced by aerobic cellular respiration is made by oxidative phosphorylation. this works by the energy released in the consumption of pyruvate being used to create a chemiosmotic potential by pumping protons across a membrane. this potential is then used to drive atp synthase and produce atp from adp and a phosphate group. biology textbooks often state that 38 atp molecules can be made per oxidised glucose molecule during cellular respiration (2 from glycolysis, 2 from the krebs cycle, and about 34 from the electron transport system). however, this maximum yield is never quite reached because of losses due to leaky membranes as well as the cost of moving pyruvate and adp into the mitochondrial matrix, and current estimates range around 29 to 30 atp per glucose.
cellular respiration