how does yeast undergo cellular respiration

The key ingredient for making fluffy bread is yeast. Yeast is a single-celled fungus, which is alive and must make its own energy to survive. The yeast in your bread uses a process called cellular respiration, where glucose is converted to ATP and carbon dioxide. The carbon dioxide is what causes the bread to rise. The yeast produces this gas and the bread puffs up, incorporating the gas in between the flour. Today, we'll learn about this process, which requires oxygen, called aerobic respiration, and another process of yeast called anaerobic respiration.