Cell Energy

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Cell Energy
SCI/230
9/28/12

Associate Program Material

Cell Energy Worksheet

Answer the following questions:

* Cellular respiration:

* What is cellular respiration and what are its three stages? *
* Cellular respiration is the multi-step process in which oxygen is transformed within cells * producing carbon dioxide, the process purpose is transforming fuel intake into energy for cells. The three stages are glycolysis, citric acid cycle, and oxidative phosphorylation. (Dickey, Reese, Simon, 2010). *

* What is the role of glycolysis? Include the reactants and the products. Where does it occur? *
* Glucose, the body’s fuel is utilized in the role of glycolysis. This process occurs outside of the * Mitochondria. Glucose molecule splits in half. Then the NAD and electron carriers pick up electrons and hydrogen from carbon molecules forming NADH. The electron carriers play a major role in transporting the electrons to the reaction process within the mitochondria. A small amount of ATP is produced in the last step where for every glucose only two are made outside the Mitochondria. At the same time another energy source is produced providing larger amounts of energy, this source is called pyruvic acid. This acid enters the mitochondrion where most of the energy is removed. As it enters the carbon is removed and by-product electrons, co-enzyme a clings to the remaining two carbons making acetyl CoA. (Dickey, Reese, Simon, 2010). *

* What is the role of the citric acid cycle? Include the reactants and the products. Where does it occur? *
* The citric acid cycle also known as the Krebs cycle. The purpose is to combine and transform * carbons into more energy while transference allows carbon dioxide to be released for exasperation. The co-enzyme A is removed allowing the remaining carbons to attach to pre-existing four carbon molecules, the beginning part of this phase. As this six strand carbon...
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