respiration and fermentation both extract energy from food
Cellular Respiration
Electron Transport Chain
NADH gives two electrons to the first protein in the electron transport chain. NADH then become NAD+. NADH is able to give its two electrons to the beginning of the chain. The actual electron transport chain is a collection of molecules, mostly proteins that are embedded in the inter cell membrane of the mitochondria. Since the inner membrane of the mitochondria is folded so much (maximizes surface area) there are thousands of electron transport chains. Along with the proteins there are prosthetic groups (non protein components essential for catalytic functions of certain enzymes). As the electrons travel down the chain, they experience a drop in free energy. As the electron carriers donate and accept electrons, the carriers alternate between reduced and oxidized states. When the molecule accepts electrons from its uphill neighbor the molecule becomes reduced. The molecules lower on the chain have higher electronegativities. When the molecule passes the electron to its downhill neighbor, the molecule becomes oxidized. Most of the electron carriers are cytochromes (they have a heme group that has an ion which donates and accepts electrons). At the very end of the chain, the electron is given to an oxygen molecule which combines with two hydrogens to form water. FADH2 can also donate two electrons like NADH. When FADH2 donates the electrons, the electrons enter at a lower stage than NADH's electrons (NADH's electrons enter at complex 1 while FADH2's electrons enter at complex 2). Since FADH2's electrons enter at complex 2, they provide one third less energy then NADH. The electron transport chain makes no energy directly. Instead, as the electrons fall down the electron transport chain, their energy given off is used to pump hydrogen ions out of the inner cell membrane to the other against the hydrogen's concentration gradient (active transport). This way, the hydrogen ions will power ATP synthase to make the actual ATP. The electron transport chain breaks a large free-energy drop into a series of smaller steps so that more manageable amounts of energy are released.
Role of Oxygen in Cellular Respiration
Oxygen is necessary for cellular respiration because is allows pyruvate to become acetyl CoA. Oxygen is also needed because it is the final electron receptor and final destination of the electrons as they go down the electron transport chain. The oxygen basically drags the electrons down the electron transport chain. The citric acid cycle uses oxygen, and so does oxidative phosphorylation. Therefore, only glycolysis could occur without the presence of oxygen.
Fermentation and Anaerobic Respiration
Both fermentation and cellular respiration release energy from glucose and other food molecules. They are different because respiration uses energy from glucose.
Fermentation is a part of cellular respiration. It is part of anaerobic cellular respiration. It is used to keep glycolysis from stopping.
Both make ATP.
Question ispartiallywrong as fermentation is part of cellular respiration, question should be about similarities and differences in aerobic and anaerobic respiration. Cellular respiration is comprised of 3 stages , 1 glycolysis , 2 Krebs cycle and 3 electron transport chain .Fermentation is approximately similar to glycolysis except last step .
oxygen. the same goes for lactic acid
cellular respiration uses oxygen but fermentation does not use oxygen
Five basic differences between respiration fermentation?
respiration and fermentation both extract energy from food
Both fermentation and cellular respiration release energy from glucose and other food molecules, making them similar in their processes.
Glycolysis in the cytoplasm
Both make ATP.
Both fermentation and cellular respiration release energy from glucose and other food molecules, making them similar in their processes.
Respiration and fermentation are both instances of release of carbon dioxide by living organisms, in order to obtain energy after synthesizing food. Respiration occurs with the help of oxygen (aerobic) while fermentation is anaerobic.
They both are similar in releasing energy.In cellular respiration food is broken down to cell level and a lot of energy is produced and similarly in fermentation it is described that it is the process of getting energy from oxidation of organic compounds.
Fermentation is used in anaerobic respiration. Fermentation is done to replenish NAD supplies so that glycolysis can continue making ATP in the absence of oxygen.
Respiration uses oxygen, fermentation doesn't.
Question ispartiallywrong as fermentation is part of cellular respiration, question should be about similarities and differences in aerobic and anaerobic respiration. Cellular respiration is comprised of 3 stages , 1 glycolysis , 2 Krebs cycle and 3 electron transport chain .Fermentation is approximately similar to glycolysis except last step .
cellular respiration requires oxygen while fermentation does not
Fermentation!!!!!