What is happening with our cells when we eat?
Krebs cycle
The “fork in the road” happens following glycolysis.
The presence or absence of oxygen
decides which path it takes next. (Picture)
-Order glucose+ oxygen >glycolysis> krebs cycle> electron transport chain
-Krebs cycle follows glycolysis if oxygen is present
-Glycolysis happens in the cytoplasm outside the mitochondria.
-Krebs cycle happens in matrix inside the mitochondria
-pyruvic acid (pyruvate) enters the mitochondrion and pyruvate joins with coenzyme A to form ACETYL- CoA
-2 carbon ACETYL-CoA combine with a 4 carbon molecule to form a 6 carbon molecule called citric acid
-Coenzyme A goes back to pick up another pyruvic acid and citric acid completes the krebs cycle
-The krebs cycle produces 3 Co2 (carbon dioxide) 1 ATP (Adenosine triphosphate / energy supplier for the cells) 1 FADH2 (Flavin adenine dinucleotide) and 4 NADH (Nicotinamide adenine dinucleotide)
- FADH2 and NADH are high energy electron carriers and move to the electron transport chain
-in all of this 6 carbon in the glucose are lost to the atmosphere as carbon dioxide
Electron Transport Chain (makes 32 net ATPs)
-enzymes for the electron transport chain are located in the inner mitochondrial membrane (cristae)
-high energy electrons from NADH (is at the beginning of the chain and turn into 3ATP) and FADH2 (Farther down the chain and turn into 2 ATP) are passed along the Electron transport chain, energy from passing electrons are used to transport Hydrogen Ions across the membrane
-The pumping of hydrogen ions into the intermembrane space represents potential energy that is harnessed to make ATP as Hydrogen ions escape through ion channels back into the matrix ATP synthase spins and adds a phosphate to Adp to form ATP
-Oxygen serves as the final electron acceptor of the electron transport chain and at the end of the chain an enzyme combines the electrons with the hydrogen ions and oxygen to form water
The “fork in the road” happens following glycolysis.
The presence or absence of oxygen
decides which path it takes next. (Picture)
-Order glucose+ oxygen >glycolysis> krebs cycle> electron transport chain
-Krebs cycle follows glycolysis if oxygen is present
-Glycolysis happens in the cytoplasm outside the mitochondria.
-Krebs cycle happens in matrix inside the mitochondria
-pyruvic acid (pyruvate) enters the mitochondrion and pyruvate joins with coenzyme A to form ACETYL- CoA
-2 carbon ACETYL-CoA combine with a 4 carbon molecule to form a 6 carbon molecule called citric acid
-Coenzyme A goes back to pick up another pyruvic acid and citric acid completes the krebs cycle
-The krebs cycle produces 3 Co2 (carbon dioxide) 1 ATP (Adenosine triphosphate / energy supplier for the cells) 1 FADH2 (Flavin adenine dinucleotide) and 4 NADH (Nicotinamide adenine dinucleotide)
- FADH2 and NADH are high energy electron carriers and move to the electron transport chain
-in all of this 6 carbon in the glucose are lost to the atmosphere as carbon dioxide
Electron Transport Chain (makes 32 net ATPs)
-enzymes for the electron transport chain are located in the inner mitochondrial membrane (cristae)
-high energy electrons from NADH (is at the beginning of the chain and turn into 3ATP) and FADH2 (Farther down the chain and turn into 2 ATP) are passed along the Electron transport chain, energy from passing electrons are used to transport Hydrogen Ions across the membrane
-The pumping of hydrogen ions into the intermembrane space represents potential energy that is harnessed to make ATP as Hydrogen ions escape through ion channels back into the matrix ATP synthase spins and adds a phosphate to Adp to form ATP
-Oxygen serves as the final electron acceptor of the electron transport chain and at the end of the chain an enzyme combines the electrons with the hydrogen ions and oxygen to form water