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Unformatted text preview: For Today 1. Quiz 7 2. Hand in Worksheet 5 3. Cell Respiration Activity Quiz 1. Take 10 min to discuss your answers on WS 5 2. Hand in WS 5, please make sure your name is on it 3. I will randomly select 5 questions to grade; however, I will not grade the concept map at the end of the WS. Cell Respiration
1. Work with 1 or 2 other individuals. These individuals will also be the people you work with to complete the final project (details later) Each individual will pick a different colored marker; this way I can see that each individual contributed. 2. 3. Be as artistic as you wish, but make sure to include the three major steps (Glycolysis, Citric Acid Cycle, and Electron Transport), key regulatory enzymes, and key inputs and outputs. Also, identify where these reactions occur
Put your names on the poster. I will collect these and post images of some of them on blackboard. 4. Redox Rxns
Redox reactions can be tricky to interpret. It’s not as simple as just looking where the electrons go, but also how they are distributed. This is the simplest example I can think of to demonstrate this Formation of Water: 2H2 + 02 2 H2O Here, we form a covalent bond, so it’s not like electrons were gained or lost by Hydrogen or Oxygen, they were just redistributed. If you recall, Oxygen is more electronegative than Hydrogen, and so the electrons are drawn towards it. In essence, the oxygen has gained more electrons, while the Hydrogen has lost a little. Thus the oxygen reduced and the hydrogen is oxidized Redox Rxns
Now, with NADH and FADH2, it’s a bit more obvious. These electron carries donate electrons to the protein complexes in the electron transport chain. These electrons move from one complex to another, so that one complex is oxidized while another is reduced. Where did these protons and electrons come from? The Protons and Electrons gained by NAD to from NADH are eventually given up to the Electron Transport Chain. The electrons pass through the protein complexes while the protons are pumped across the inner membrane of the mitochondrion. This process results in oxidative phosphorylation. Substrate Phosporylation
Below is the series of reactions that make up Glycolysis. Notice that when ATP is created, the phosphate group is coming off another molecule or substrate. In oxidative phosporylation, the phosphate is free floating and not attached to another molecule. This is a key difference between the substrate and oxidative phosphorylation. ...
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- Spring '10