Q:

What are the four steps in cellular respiration?

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Quick Answer

In chronological order, the four steps of cellular respiration are glycolysis, a transition reaction, the Krebs Cycle and an electron transport chain. Cellular respiration occurs in the cytoplasm and in the mitochondria.

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What are the four steps in cellular respiration?
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Full Answer

Glycolysis occurs in the cytoplasm, and it allows one glucose molecule to split into two molecules of pyruvic acid. Next, the transition reaction moves the pyruvic acid into the mitochondria, where it is converted into acetyl coenzyme A. Next, the Krebs Cycle occurs in the mitochondria and produces four molecules of ammonium triphosphate and numerous molecules of reduced nicotinamide adenine dinucleotide. Finally, the electron transport chain in the mitochondria produces approximately 32 molecules of ATP and finishes the process of cellular respiration. In total, approximately 38 molecules of ATP are produced for every molecule of glucose.

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Related Questions

  • Q:

    During what part of aerobic respiration is the majority of ATP produced?

    A:

    The majority of adenosine triphosphate (ATP) molecules are produced during the electron transport chain. This is part of the final step in aerobic cell respiration and part of the oxidative phosphorylation process.

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  • Q:

    What is the role of oxygen in aerobic respiration?

    A:

    Oxygen is used as an electron acceptor within the electron transport chain of aerobic respiration to generate adenosine triphosphate, or ATP. This compound is an essential component in intracellular energy transfer. Aerobic cellular respiration is in direct contrast of anaerobic respiration, which does not require oxygen.

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  • Q:

    What is the purpose of glycolysis?

    A:

    Glycolysis is the first step of cellular respiration, the process by which living cells break down glucose into small, energy-containing molecules called ATP. In glycolysis, a single glucose molecule breaks down into two molecules of pyruvate, which can then be broken down further to release ATP. Glycolysis itself releases two molecules of ATP per molecule of glucose.

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  • Q:

    What are the coorrect order of steps required for aerobic cellular respiration?

    A:

    The steps required for aerobic cellular respiration are, in order of their occurrence: glucose —> glycosis —> TCA cycle —> electron transport reactions —> denosine triphosphate, or ATP. The sequence starts with the carbohydrate glucose, which contains stored energy, and moves through a series of biochemical reactions that ends with the production of ATP, which is the energy currency used by cells to fuel their metabolic processes. Oxygen is required for aerobic respiration to occur, and in eukaryotic cells, most of the reactions take place within a cell's mitochondria.

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