What are the primary steps involved in cellular respiration?

What are the primary steps involved in cellular respiration?

• A. Photosynthesis, glycolysis, fermentation
• B. Glycolysis, the Krebs cycle, and the electron transport chain
• C. Fermentation, the Krebs cycle, and oxidation
• D. Electron transport chain, photosynthesis, glycolysis

Answer: (B)

The primary steps involved in cellular respiration consist of glycolysis, the Krebs cycle, and the electron transport chain. This process is fundamental for cells to convert nutrients into usable energy in the form of ATP (adenosine triphosphate). Glycolysis is the first step, occurring in the cytoplasm, where glucose is broken down into pyruvate. This process does not require oxygen and generates a small amount of ATP and NADH, a carrier of electrons that will be used later in the process. Following glycolysis, pyruvate enters the mitochondria and is processed through the Krebs cycle (also known as the citric acid cycle). This cycle produces additional NADH and FADH2 molecules, as well as some ATP. In this cycle, acetyl-CoA, derived from pyruvate, undergoes a series of reactions, ultimately leading to the release of carbon dioxide as a waste product. The final step is the electron transport chain, which takes place in the inner mitochondrial membrane. The NADH and FADH2 produced in previous steps transfer their electrons through a series of proteins in the chain, ultimately driving the production of a significant amount of ATP. Oxygen acts as the final electron acceptor in this process,

The primary steps involved in cellular respiration consist of glycolysis, the Krebs cycle, and the electron transport chain. This process is fundamental for cells to convert nutrients into usable energy in the form of ATP (adenosine triphosphate).

Glycolysis is the first step, occurring in the cytoplasm, where glucose is broken down into pyruvate. This process does not require oxygen and generates a small amount of ATP and NADH, a carrier of electrons that will be used later in the process.

Following glycolysis, pyruvate enters the mitochondria and is processed through the Krebs cycle (also known as the citric acid cycle). This cycle produces additional NADH and FADH2 molecules, as well as some ATP. In this cycle, acetyl-CoA, derived from pyruvate, undergoes a series of reactions, ultimately leading to the release of carbon dioxide as a waste product.

The final step is the electron transport chain, which takes place in the inner mitochondrial membrane. The NADH and FADH2 produced in previous steps transfer their electrons through a series of proteins in the chain, ultimately driving the production of a significant amount of ATP. Oxygen acts as the final electron acceptor in this process,