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citric acid cycle

citric acid cycle

7.3
A series of chemical reactions in the mitochondria of cells that make energy
  • noun
  • /ˈsɪtrɪk ˈæsɪd ˈsaɪkəl/
  • Specialized
translation icon : ciclo del ácido cítrico
  • During cellular respiration, the citric acid cycle plays a crucial role in energy production.

Examples

  • The citric acid cycle is essential for producing energy in cells during metabolism.

  • So TCA, tricarboxylic acid cycle, Krebs cycle, citric acid cycle, all synonyms for the same thing.

  • In the citric acid cycle, acetyl-CoA is oxidized to produce energy-rich molecules.

Synonyms

Krebs cycle
vscitric acid cycle
  • Specialized
1 5.1

A series of chemical reactions in cells that make energy, carbon dioxide, and water

is the descriptive chemical name preferred in many scientific contexts
Krebs citric acid cycle
vscitric acid cycle
  • Specialized
6.9

A series of reactions in the cell's mitochondria that change food molecules into energy

is the broader name used without the extra biochemical detail
tricarboxylic acid cycle
vscitric acid cycle
  • Specialized
5.2

A series of chemical reactions in cells that make energy from food

is the common descriptive name used in many introductory descriptions

Surface Forms

Morphology

citric + acid + cycle

The phrase literally signals a 'cycle' involving 'citric'/'acid', so a learner who knows the constituents can infer it refers to a repeating series of steps connected to citric acid. However, the precise biochemical sense (enzyme-catalyzed reactions in mitochondria producing cellular energy) is specialized and not predictable from the words alone, so full understanding requires domain knowledge.

Etymology

Citric acid cycle is named after citric acid, a substance first found in citrus fruits like lemons, and cycle shows the steps go round and return to the start. In cells this repeating set of steps helps make 'energy', so the name refers to the circular process that creates power for the cell.