cellular respiration by: kelsey cherry

cellular respiration formula

Glucose + Oxygen -> Carbon Dioxide + Water + ATP

The glucose and oxygen are what's known as reactants, things that go into the process. Carbon dioxide, water and ATP are products of cellular respiration, this means that they are what is made after cellular respiration takes place.

Cellular respiration is an aerobic reaction. This means that in order for it to take place, the presence of oxygen is needed. The opposite reaction is an anaerobic reaction--which in turn means that no oxygen is required for the reaction to take place.


In order to fully understand cellular respiration, we must first look at the beginning in the process called Glycolosis. Glycolosis is the process where enzymes break down glucose which releases energy. Glycolosis occurs in the cytoplasm of a cell.

Both eukaryotic cells and prokaryotic cells undergo gycolysis. Meaning that each of those cells contain mitochondria--which is the powerhouse of the cell.

Glycolysis' major input is Glucose and the major output is Pyruvic Acid.

Krebs Cycle

Cellular Respiration takes place with two different types of reactions. The first one is the Krebs Cycle. Also known as the Citric Acid Cycle. The Krebs Cycle is located in the matrix of the mitochondria. Pyruvic acid is broken down into carbon dioxide and more NADH is made. This process releases a total of 2 ATP.

The Krebs Cycle is an aerobic process-- so like mentioned earlier, it needs oxygen.

NADH and FADH2 are the energy carriers that are produced in the Krebs Cycle. A waste compound that comes from the Krebs Cycle is CO2.

Electron Transport Chain

After the Krebs Cycle takes place, then come the Electron Transport Chain. This is also known as oxidative phosphorylation.

The Electron Transport Chain can be found occurring in the cristae of the mitochondria. This process in aerobic because oxygen is needed for the process to even begin.

Oxygen is a reactant of this process and water is a product.

NADH and FADH2 are some of the energy based molecules that are used.

High energy electrons that come from the Krebs Cycle are used to convert ADP into ATP.

Cellular Respiration

Cellular Respiration is important because it allows cells to make more energy. Unlike photosynthesis, energy is released rather than captured. It is a catabolic reaction that "cuts" molecules--which makes more. Cellular Respiration has three distinct processes- glycolysis, the Krebs Cycle, and the Electron Transport Chain.

Cellular respiration allows the cells to make massive amounts of energy at a time, in turn making it very efficient. The more energy that is created, the faster we can work through and use the energy.

Works Cited

"Animation: How the Krebs Cycle Works (Quiz 1)." Animation: How the Krebs Cycle Works (Quiz 1). N.p., n.d. Web. 13 Dec. 2016.

"CK-12 PLIX Series." CK-12 PLIX Series. N.p., n.d. Web. 13 Dec. 2016.

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