In the four steps of "AEROBIC CELLULAR RESPIRATION" where do the Intermediate Step take place in a cell; Krebs Cycle - Where does it take place in a cell?; Electron Transport Chain - Where does it take place in a cell?
In aerobic cellular respiration, the four main steps are:
1. Glycolysis: Takes place in the cytoplasm of the cell.
2. Intermediate Step (also known as Pyruvate Oxidation): Takes place in the mitochondria of the cell.
3. Krebs Cycle (also known as the Citric Acid Cycle): Also takes place in the mitochondria of the cell.
4. Electron Transport Chain (ETC): Takes place in the inner membrane of the mitochondria.
To summarize:
- Glycolysis: Cytoplasm
- Intermediate Step: Mitochondria
- Krebs Cycle: Mitochondria
- Electron Transport Chain: Mitochondrial inner membrane
In aerobic cellular respiration, the process is divided into four main steps: Glycolysis, Intermediate Step, Krebs Cycle (also known as the Citric Acid Cycle or TCA Cycle), and the Electron Transport Chain (ETC).
1. Glycolysis: Glycolysis takes place in the cytoplasm of the cell. It is the first step of cellular respiration, where glucose molecules are converted into pyruvate molecules, producing a small amount of ATP and NADH.
2. Intermediate Step: The Intermediate Step occurs in the mitochondria of the cell. After glycolysis, the pyruvate molecules that were produced in the cytoplasm are transported into the mitochondria. In the mitochondria, the pyruvate molecules are converted into acetyl-CoA, releasing carbon dioxide and generating more NADH.
3. Krebs Cycle: The Krebs Cycle also occurs in the mitochondria. Acetyl-CoA, generated from the Intermediate Step, enters the Krebs Cycle. In this cycle, the acetyl-CoA is further broken down, releasing carbon dioxide, transferring energy to NADH and FADH2, and producing a small amount of ATP.
4. Electron Transport Chain (ETC): The Electron Transport Chain takes place on the inner mitochondrial membrane. NADH and FADH2, which were generated in the previous steps, transfer their electrons to the proteins in the electron transport chain. As the electrons move along the chain, energy is released and used to pump protons (H+) across the inner mitochondrial membrane. This creates an electrochemical gradient that drives the synthesis of ATP through a process called oxidative phosphorylation.
By understanding the location of each step in a cell, scientists can better study and regulate cellular respiration and its various stages.