Cellular Respiration Storyboard
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It’s a Saturday evening and you are sitting in the living room. You spot a bright orange bag of Cheetos across the room in the kitchen. Your stomach rumbles and you attempt to get off the couch. Here’s an inside look at what’s happening inside your cells.
In the Cytoplasm...
It begins with glucose. This is broken down during glycolysis. ATP is invested, to create ADP. Since the ATP gives glucose protons, it becomes unstable. Then the glucose gets converted into G3P. ADP is traded to create ATP and NAD+ picks up a proton and becomes NADH. This is transported to the ELC. What’s left is pyruvic acid.
The next step is the Krebs Cycle. This occurs in the matrix. Pyruvic oxidation then occurs. CO2 is released and NAD+ is converted into NADH. Then an enzyme called CoA joins Acetyl CoA to make citric acid.
Citric acid releases a CO2 molecule and produces NADH. What’s left is a 5-carbon molecule. Then anther CO2 molecule is released, creating even more NADH. When there is a 4-carbon molecule, FAD+ picks up protons and becomes FADH2. More NADH is produced, and the cycle goes on.
The last step is the electron transport chain. This occurs in the inter membrane. The protons from NADH and FADH2 are pumped into the inner membrane space. The electrons are pumped down the chain.When there is enough protons in the inner membrane space, it creates a gradient. Then a flood of protons rush down the proton pump, creating ATP synthase. ADP then converts the synthase into ATP.
This was an inside look of cellular respiration.
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