Q:

What is the main function of the Krebs cycle?

A:

The main function of the Krebs cycle is energy production, according to the Research Collaboratory for Structural Bioinformatics Protein Data Bank. The Krebs cycle, also known as the tricarboxylic acid cycle or the citric acid cycle, is at the center of cellular metabolism.

There are eight reactions in the Krebs cycle. The cycle starts with the addition of an acetyl group to oxaloacetate. After the eight reactions, the acetyl group is broken apart, and oxaloacetate is restored, thereby completing the cycle.

The Krebs cycle finishes the breakdown of sugar started by glycolysis and produces adenosine triphosphate, called ATP. ATP is the molecular currency of the cell and stores and transports energy within it. The Krebs cycle is at the center of biosynthetic reactions and provides intermediates that are used to make amino acids and other molecules.

The Krebs cycle also provides electrons for the process of oxidative phosphorylation. Oxidative phosphorylation is a major source of ATP and energy. The electrons are stored in the carrier molecule NADH. The electrons drive a proton gradient that powers ATP synthase. ATP synthase is the enzyme that makes ATP. The Krebs cycle takes place in the mitochondria, and the proton gradient is generated in the mitochondrial membrane.

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Related Questions

  • Q:

    What is another name for the Krebs cycle?

    A:

    Another name for the Krebs cycle is the citric acid cycle. The Krebs cycle is also referred to as the tricarboxylic acid cycle.

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  • Q:

    What does the Krebs cycle produce?

    A:

    The Krebs cycle, also referred to as the Citric Acid cycle, is the process during which humans and animals break down and metabolize carbohydrates, proteins and fats. This cycle produces carbon dioxide, water and high-energy phosphate molecules.

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  • Q:

    What is the difference between glycolysis and the Krebs cycle?

    A:

    Glycolysis is the breakdown of a molecule of glucose into two molecules of pyruvate, while the Krebs cycle is the conversion of the resulting pyruvate molecules into a compound known as acetyl CoA. Both of these steps occur before oxidative phosphorylation, which is the major energy-producing process of aerobic metabolism. Glycolysis is a process used by all forms of life, even those that do not use oxygen.

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  • Q:

    What does the Krebs cycle start with?

    A:

    The Krebs cycle starts when acetyl CoA reacts with the compound oxaloacetate to form citrate and release coenzyme A, explains Encyclopedia Britannica. The Krebs cycle is also called the tricarboxylic acid cycle and the citric acid cycle.

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