Describe the cellular regions where glycolysis, the Krebs cycle, and the electron transport chain occur.

Glycolysis - cytoplasm

Kerb's cycle- mitochondrial matrix

Electron transport chain- inner mitochondrial membrane

Explanation:

Glycolysis is the first step of cellular respiration. The process of glycolysis occurs in the cytoplasm of the cell and this process is not dependent on oxygen. In glycolysis the glucose is partially oxidized into pyruvate molecules.

This pyruvate is fully oxidized in the Kreb's cycle which occurs in the matrix of mitochondria. NADH produced during the Kreb cycle and glycolysis feeds electron in the electron transport chain which is present in the inner mitochondrial membrane. This feeding of electron allows the formation of ATP and the process is called oxidative phosphorylation.

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