Question

summerize the process of cellular resperation

Answer 1

In cellular respiration a glucose molecule will be broken down into two molecules of pyruvic acid and produce some ATP. Electrons from the glucose molecule will also be passed down to the electron carrier NADH. This stage is called glycolysis. The pyruic acid will then move onto the next stage called the Krebs cycle or citric acid cycle where a moleulce from the pyruvic acid molecule will be removed as C02 leaving the other two carbon atmos to be combined with a coenzyme forming acetyl-CoA. The acetyl-CoA adds its carbon group to a 4 carbon molecule called citric acid which through a series of steps will release C02 to become a 4 carbon molecule which will be used in the stage again. Electrons also continue to be passed down to electron carries such as NADH and FADH. The electrons produces in glycolysis and the Krebs cycle will finally enter the final stage called the electron transport chain. As the electrons are passed down in this stage energy from this will pump hydrogen ions in the intermembrane space forming a concentration gradient. The electrons will move down the chain until they reach the electron acceptor oxygen which will combine the electrons with hydrogen ions to make water. This disposes the electrons and ends the passing down process. Lastly, the relative charge between the intermembrane space and the matrix causes the hydrogen ions to fall back across their concentration gradient into ATP synthase which forms a ton of energy for other cells.