CBSE Class 11-science Answered

To enter the respiratory pathway, fatty acids and proteins are broken down or degraded to acetyl CoA.

During the synthesis of proteins and fats, the substances are withdrawn from the respiratory pathways and used in anabolism.

The breakdown of substances is called catabolism, and the formation of substances is called anabolism. Because the respiratory pathway is responsible for both anabolism and catabolism, it is called an amphibolic pathway.