Q:

What is the main function of the Krebs cycle?

A:

Quick Answer

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.

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Full Answer

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 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 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 is the purpose of the Krebs cycle?

    A:

    The Krebs cycle, also known as the citric acid cycle and the tricarboxylic acid cycle, is the central metabolic pathway that takes place in the mitochondrion and breaks down all metabolites, including sugars, fatty acids and amino acids. The cycle is named after German-born British physician and biochemist Hans Adolf Krebs, who identified the citric acid cycle in the human body while working at the University of Sheffield in 1937.

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  • Q:

    Where does the Krebs cycle occur?

    A:

    The Krebs cycle occurs in the mitochondria of living cells. It's also called the citric acid cycle and the TCA cycle. The Krebs cycle is necessary for metabolism, in which cells change food into energy.

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