Question

What are the three phases involved in cellular respiration?

Answer 1

Hint: Cellular respiration is the process that is used to turn glucose that is present inside the cells into ATP. This ATP is used as a source of energy to provide all the tissues and organs in the body with the energy they need to work.

Complete answer:
Cellular respiration helps the body to break down all the glucose that is present in the body into energy. This energy is stored in the form of ATP and is then used by the body when required.
There are three phases in total that are involved in cellular respiration, glycolysis, Krebs cycle, and electron transfer chain.
Glycolysis: FIrst the glucose molecule needs to be broken down into pyruvic acid so that it can be utilized to make more ATP. There are a few ATP’s formed in this process as well.
Krebs cycles: The pyruvic acid that is formed in the previous step is used in this reaction. The Krebs cycle is a cycle that converts ${NAD}^{+}$ and ${FAD}^{+}$ into NADH and ${FADH}_2$ respectively. These two molecules are used as electron carriers.
Electron transfer chain: The electron carriers that are formed in the previous reaction are used over here. Oxidative phosphorylation occurs in this phase. The electrons move through several channels present in the membrane of the mitochondria. The bulk of ATP is formed over here. A molecule known as ATP synthase is responsible for producing most of the ATP.

Note:
Cellular respiration is a process that is used to convert glucose to energy. There are three phases to this process, glycolysis, Krebs cycle, and the electron transfer chain.