Where does the Krebs cycle (citric acid cycle) take place in eukaryotic cells?
The citric acid cycle is a sequence of chemical reactions that happens in the cytosol of eukaryotic cells. It takes place in the mitochondrial matrix.
What takes place in the Krebs cycle?
The Krebs cycle is the process of metabolizing glucose. In the beginning, the cycle converts glucose to two pyruvates. Pyruvates are three carbon compounds that can be used to make energy in the form of ATP. Pyruvates can also be used to make lactate. In highly aerobic (oxygen-rich) organisms, such as humans, the pyruvates are used to make energy. In anaerobic (oxygen-poor) organisms, the
Where does the Krebs cycle take place in humans?
Humans have two copies of each of the genes that encode the enzymes of the Krebs cycle. In addition, several genes involved in metabolizing Krebs cycle intermediates are present in humans but have lost their function in humans. This means that these genes are still present because of an early evolutionary loss, but they are no longer required.
Where does the Krebs cycle take place in eukaryotic cells?
In eukaryotic cells, the Krebs cycle takes place mainly in the mitochondria, the ‘energy factories’ of the cell. Every cell in the body contains millions of mitochondria. The Krebs cycle generates adenosine triphosphate (ATP), the cell’s major source of energy, which the cell uses to do work. In addition to providing energy, the Krebs cycle also produces two important building blocks of the cell: ketone bodies and
Where does the Krebs cycle happen in prokaryotic cells?
In prokaryotes, the Krebs cycle mainly occurs within the cytoplasm. However, some bacteria have an organelle called the periplasm. The periplasm is the space between the cytoplasm and the cell wall. The Krebs cycle usually happens within the periplasm.
