Cellular Respiration!
Texto del Guión Gráfico
- Look around, cellular respiration is all around us!
- Cellular respiration breaks down glucose and has three major steps.
- Oh wow that's so cool! Tell me more. 
- What is cellular respiration?
- That's crazy!
- The first step is glycolysis. It takes place in the cytoplasm and does not necessarily need oxygen. During this step glucose gets turned into pyruvate with the help of ATP for energy. The net yield is around 2 ATP molecules and 2 NADH molecules.  
- What is the last step?
- The second step is called the Krebs Cycle, which occurs in the mitochondria. This step needs oxygen. The pyruvate gets oxidized and produces carbon dioxide, as well as 2 ATP, 6 NADH, and 2 FADH molecules. 
- It's called the Electron Transport Chain. It still occurs in the mitochondria and still needs oxygen. Electrons get transfers from the NADH and FADH to multiple electron carriers, which then are used to create a proton gradient. Those protons power the ATP synthase. The ATP synthase takes phosphates and adds them to ADP to create ATP! The net yield for this step is around 32-34 ATP. An oxygen is left over, making water a product because 2 hydrogen atoms bond with the oxygen.
- Wow that's complex.
- Fun fact - oxygen can affect this process greatly. If there is no oxygen some cells can perform a process called Fermentation. It is not as efficient but it still can make ATP with no oxygen. 
- I learned so much from you about cellular respiration, thank you! 
- At the end, the maximum theoretical yield would be 38 ATP, but 36 ATP is also very much a possibility. 
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