Can someonee explain the krebs cycle, glycolysis, and the electron transport chain? you

Hello! Cellular respiration can be confusing in textbooks and in general, so I've explained it in my own words the best I can to simplify it. :)

To start off, all of these processes are part of cellular respiration, which is a process cells use to extract energy from food and convert it to ATP, or energy.

Glucose + Oxygen → Water + Energy (ATP)

Here are the steps of cellular respiration:

1. Glycolysis- This process occurs in the cytoplasm. Glycolysis breaks down one molecule of glucose, a six-carbon molecule, into two three-carbon molecules called pyruvic acid. This process also produces four molecules of ATP, however, two molecules of the ATP are used in glycolysis, which means there is a net gain of 2 ATP molecules.

In short: Glycolysis= 1 molecule of glucose to 2 molecules of pyruvic acid/pyruvate, and also produces produces 2 ATP

Pyruvic acid is necessary to the next step of cellular respiration, which is the Krebs cycle.

2. Krebs Cycle (Citric Acid Cycle)- This process takes place in the matrix of the mitochondria of the cell. Pyruvate combines with coenzyme A before it enters the cycle. During the conversion of pyruvate to acetyl co-A, carbon dioxide is produced. Two rounds of this cycle occurs per glucose molecule.

In short: Krebs= Pyruvate + coenzyme A = acetyl coA, releases CO2 during this process, 3 NADH, 1 ATP, and 1 FADH.

3. Electron Transport Chain- This process creates a concentration gradient between protons, creating energy during chemiosmosis. This process produces 34 ATP molecules.

I hope this helps, and let me know if you have any questions! ^-^