BioCoach Activity

Concept 1: Overview of Respiration

We can divide cellular respiration into three metabolic processes: glycolysis, the Krebs cycle, and oxidative phosphorylation. Each of these occurs in a specific region of the cell.

  1. Glycolysis occurs in the cytosol.
  2. The Krebs cycle takes place in the matrix of the mitochondria.
  3. Oxidative phosphorylation via the electon transport chain is carried out on the inner mitochondrial membrane.

In the absence of oxygen, respiration consists of two metabolic pathways: glycolysis and fermentation. Both of these occur in the cytosol.