Glycolysis

Objectives

• Describe the structure of mitochondria
• Summarize glycolysis

Cellular respiration releases the energy in glucose and makes ATP.

Stages

• Glycolysis
• Krebs cycle / citric acid cycle
• Electron transport

The structure of the mitochondrion is key to aerobic respiration.

It has an inner and outer membrane with an intermembrane space.

The space enclosed by the inner membrane is the matrix, where the Krebs cycle takes place. Electron transport takes place ON the inner membrane.

Glycolysis does not take place in the mitochondrion, nor does it require oxygen.

Glycolysis occurs in the cytosol.

Enzymes split glucose into two molecules of pyruvate. Two ATP molecules provide the energy to start this process.

However, there is a net gain of two ATP and two NADH.

Then comes the Krebs cycle!