Explain the process of oxidation of glucose that takes place in the cells of human beings withreference to the mechanism of cellular respiration

The process of oxidation of glucose in human cells is a part of cellular respiration, which is a set of metabolic reactions and processes that take place in the cells of organisms. Here's a step-by-step explanation:

1. Glycolysis: This is the first step of glucose metabolism. It takes place in the cytoplasm of the cell. One molecule of glucose (6 carbons) is broken down into two molecules of pyruvate (3 carbons each). This process generates 2 molecules of ATP (Adenosine Triphosphate, the energy currency of the cell) and 2 molecules of NADH (an electron carrier).

2. Transition Reaction: Each pyruvate molecule is transported into the mitochondria, where it is converted into Acetyl CoA. This process also releases one molecule of CO2 and generates one molecule of NADH per pyruvate.

3. Citric Acid Cycle (Krebs Cycle): Each Acetyl CoA enters the Krebs cycle, where it is oxidized to produce 2 molecules of CO2. This process also generates 1 ATP, 3 NADH, and 1 FADH2 (another electron carrier) per Acetyl CoA.

4. Electron Transport Chain (ETC): The NADH and FADH2 molecules produced in the previous steps are used in the ETC, which is located in the inner mitochondrial membrane. Here, electrons are transferred from NADH and FADH2 to oxygen (the final electron acceptor), producing water. This process also generates a proton gradient across the mitochondrial membrane, which is used to produce ATP.

In total, the complete oxidation of one glucose molecule generates up to 38 molecules of ATP, which are used to power various cellular processes. This process also produces water and carbon dioxide as waste products, which are eliminated from the body.