In which movement of electrons energy is released to yield an ATP:

Explanation

When electrons move from cytochrome b to cytochrome c, they release a small amount of energy. This energy is not enough to make an ATP molecule. However, it is enough to help the ETC pump protons across the inner mitochondrial membrane. This creates a proton gradient, which is used to make ATP molecules later on.So, the movement of electrons from cytochrome b to cytochrome c is an important step in the ETC, even though it doesn't directly make ATP. It helps to create the conditions that are necessary for ATP synthesis to happen.