During which phase of cellular respiration is carbon dioxide released?(1 point)
Responses
digestion
digestion
electron transport chain
electron transport chain
glycolysis
glycolysis
Krebs cycle
Krebs cycle
Carbon dioxide is released during the Krebs cycle phase of cellular respiration.
During cellular respiration, carbon dioxide is released during two phases: the Krebs cycle and the electron transport chain. Let me explain how each of these phases relates to the release of carbon dioxide.
1. Krebs Cycle: This is also known as the citric acid cycle or the tricarboxylic acid cycle. It occurs in the mitochondria of cells and involves a series of chemical reactions that break down glucose and other organic molecules. During the Krebs cycle, carbon dioxide is produced as a byproduct when carbon atoms are released from glucose molecules. These carbon atoms are then combined with oxygen to form carbon dioxide, which is subsequently released.
2. Electron Transport Chain: This is the final step of cellular respiration and occurs in the inner mitochondrial membrane. It involves the transfer of electrons from molecules generated in earlier steps to molecular oxygen (O2). The transfer of electrons releases energy, which is used to create ATP, the energy currency of cells. During this process, some of the carbon atoms from glucose are further oxidized and combine with molecular oxygen to produce carbon dioxide. The carbon dioxide is then released from the cell as a waste product.
So, to answer your question, carbon dioxide is released during both the Krebs cycle and the electron transport chain phases of cellular respiration.