Aerobic Respiration in Order

Step 6:

During electron transport, energy from NADH and FADH2 is used to make many more molecules of ATP.

Step 5:

During the Krebs cycle, pyruvate undergoes a series of reactions to produce two more molecules of ATP and also several molecules of NADH and FADH2.

Anaerobic Respiration:

Anaerobic respiration Respiration without oxygen and produces relatively small amounts of energy.

Step 1:

Cellular respiration uses energy in glucose to make ATP. Aerobic ("oxygen-using") respiration occurs in three stages: glycolysis, the Krebs cycle, and electron transport.

Step 7:

In all three stages of aerobic respiration, up to 38 molecules of ATP may be produced from a single molecule of glucose.

Step 2:

In glycolysis, glucose is split into two molecules of pyruvate. This results in a net gain of two ATP molecules.

Step 3:

Life first evolved in the absence of oxygen, and glycolysis does not require oxygen. Therefore, glycolysis was probably the earliest way of making ATP from glucose.

Aerobic Respiration:

Respiration which uses oxygen and produces relatively large amounts of energy.

Step 4:

The Krebs cycle and electron transport occur in the mitochondria. The Krebs cycle takes place in the matrix, and electron transport takes place on the inner membrane.