What is the correct order of events for cellular respiration?
Glycolysis,Krebs cycle, electron transport chain
Electron transport chain,glycolysis,Krebs cycle
Glycolysis, electron transport chain, Krebs cycle
Glycolysis, Krebs cycle, electron transport chain
The correct order of events for cellular respiration is:
1. Glycolysis
2. Krebs cycle (also known as the citric acid cycle or the tricarboxylic acid cycle)
3. Electron transport chain
The correct order of events for cellular respiration is Glycolysis, Krebs cycle, and Electron transport chain.
To understand the order of events in cellular respiration, we can break it down step by step and explain how they occur:
1. Glycolysis: This is the first stage of cellular respiration and takes place in the cytoplasm of the cell. During glycolysis, a molecule of glucose is broken down into two molecules of pyruvate. It is an anaerobic process, meaning it does not require oxygen.
2. Krebs cycle (also known as citric acid cycle or tricarboxylic acid cycle): This is the second stage of cellular respiration, which occurs in the mitochondria of the cell. The two pyruvate molecules produced during glycolysis enter the Krebs cycle. In this cycle, carbon dioxide, ATP (adenosine triphosphate), NADH (nicotinamide adenine dinucleotide), and FADH2 (flavin adenine dinucleotide) are produced.
3. Electron transport chain: This is the final stage of cellular respiration, taking place in the inner mitochondrial membrane. The energy carriers NADH and FADH2 produced during glycolysis and the Krebs cycle donate electrons and protons to the electron transport chain. As these electrons move through a series of protein complexes, energy is released, which is used to pump protons across the membrane. This creates an electrochemical gradient, which drives the production of ATP through a process called oxidative phosphorylation.
So, the correct order of events for cellular respiration is Glycolysis, Krebs cycle, and Electron transport chain.