The second step takes place in the mitochondria (Organelle). Pyruvate molecules
ID: 209880 • Letter: T
Question
The second step takes place in the mitochondria (Organelle). Pyruvate molecules formed in the process of glycolysis are broken down into CO2 and acetyl group. The acetyl group then combines with _ to form acetyl CoA. In this step two molecules of pyruvate are convated to two molecules of _ ( one-varbon molecule) and two molecules of _ ( two -carbon molecule). what is the percentage of the total carbon dioxide that is realeased by a human, duck, mushroom or tree that is produced in this step(_)? perhaps most importantly, an electron and a hydrogen atom are removed from each pyruvate molecules to reduce _, thus forming two molecules of NADH. How many ATP molecules are formed in this step?( _)
Explanation / Answer
The second step takes place in the MITOCHONDRIA. Pyruvate molecules formed in the process of glycolysis are broken down into CO2 and an acetyl group. The acetyl group then combines with COENZYME-A to form acetyl CoA. In this step, two molecules of pyruvate are converted to two molecules of CO2 and two molecules of ACETYL CoA. (2CO2 are released from 2 pyruvate molecules. Glucose has 6C atoms. So, 2/6 = 1/3 = 33.3%) the percentage of the total carbon dioxide that is released by a human, duck, mushroom or tree that is produced in this step = 33.3%. Perhaps most importantly, an electron and a hydrogen atom are removed from each pyruvate molecules to reduce NAD+ thus forming two molecules of NADH. How many ATP molecules are formed in this step?( ZERO. However, NADH can produce 2.5 ATP via ETC)