6.1 An Overview of Cellular Respiration (pages 114-117)
Cells pump ions, drive endergonic reactions, move cargo, and perform other types of work by hydrolyzing ATP. Cells
produce ATP from sugars or other reduced compounds using one of two general pathways: cellular respiration or
fermentation. Cellular respiration involves the transfer of electrons from a reduced compound like glucose to an oxidized
molecule such as oxygen, through an electron transport chain. Fermentation involves the transfer of electrons from a
reduced organic compound to an oxidized organic compound, without participation by an electron transport chain.
Cellular respiration has three components: glycolysis, the Krebs cycle, and electron transport coupled with oxidative
phosphorylation. In eukaryotes, glycolysis takes place in the cytoplasm, the Krebs cycle occurs in the mitochondrial
matrix, and electron transport and oxidative phosphorylation happen in the inner membranes of
mitochondria.
Research
Links
Basic Review
Biological Science, Chapter 6, Respiration and Fermentation
