Table of Contents
Why does FADH2 only produce 2 ATP via oxidative phosphorylation while NADH produces 3?
FADH2 produces less ATP then NADH because NADH has more energetic electrons. FADH2 produces less ATP then NADH because the electrons for FADH2 are dropped off at the second protein of the electron transport chain.
Why does NADH make 2.5 ATP?
When electrons from NADH move through the transport chain, about 10 H +start superscript, plus, end superscript ions are pumped from the matrix to the intermembrane space, so each NADH yields about 2.5 ATP.
How many ATP are produced from 2 FADH2?
For every pair of electrons transported to the electron transport chain by a molecule of NADH, between 2 and 3 ATP are generated. For each pair of electrons transferred by FADH2, between 1 and 2 ATP are generated.
Why does FADH2 result in fewer ATP than NADH H +?
FADH2 produces fewer ATP molecules than NADH when it passes its electrons down the electron transport chain because FADH2 only activates 2 proton pumps, while NADH activates 3 proton pumps.
How do NADH and FADH2 make ATP?
The electron transport chain contains a number of electron carriers. These carriers take the electrons from NADH and FADH2, pass them down the chain of complexes and electron carriers, and ultimately produce ATP. ATP synthase uses the energy from this gradient to synthesize ATP.
Why does FADH2 produce fewer ATP molecules than NADH?
FADH2 makes less ATP because it enters the electron transport chain at a later stage than does NADH. The electron transport chain is made of carrier molecules assembled into 3 protein complexes, and the passage of an electron through each complex generates enough energy to make roughly 1 ATP per complex.
What is the mechanism of ATP synthesis from FADH2?
The mechanism of ATP synthesis appears to be as follows. During the transfer of hydrogen atoms from FMNH 2 or FADH 2 to oxygen, protons (H + ions) are pumped across the crista from the inside of the mitochondrion to the outside.
What is the primary function of NADH and FADH2?
Cells of all living organisms need NADH and FADH2 (naturally occurring coenzymes) for energy production. During cellular respiration, the cells use these coenzymes to turn fuel from food into energy. This BiologyWise post elaborates more on the function of NADH and FADH2.
What process produces both NADH and FADH2?
The Krebs cycle, also known as the citric acid cycle, is a cellular process that produces both NADH and FADH2. This process takes place in the cell’s mitochondrial matrix and is one of the three parts of aerobic respiration, which is when cells convert oxygen and sugar into energy.