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02.06 Introduction to Photosynthesis

Detailed descriptions of what happens to the carbon atom

mandy dixon

on 6 November 2012

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Transcript of 02.06 Introduction to Photosynthesis

2.06 Assessment Photosynthesis The Journey of
a Carbon Atom named Bob Step 1 Light-Dependent Reactions Step 2 Light-Independent Reactions or Dark Reactions Step 3 Between Photosynthesis and Cellular Respiration Cellular Respiration Step 4 the air!!! inside of a beautiful new carbon dioxide molecule It's been a long
journey but Bob has
finally made it to.... Photosynthesis is the reaction that converts light energy to chemical energy in sugar and carbohydrates.
Here is the journey of the Carbon Atom, Bob in which he starts inside a carbon dioxide molecule and goes far beyond the imagination. Enjoy : ) For this part, Bob doesn't need light or photons, but ironically to the name of this process, it still proceeds while the sun is out. Cellular respiration takes place in the mitochondria. Here is where Bob will go through the final process. Bibliographies "ORIGIN OF THE ORGANIC SOUP." Photosynthesis. N.p., n.d. Web. 30 Oct. 2012. <http://www.bio.umass.edu/biology/conn.river/photosyn.html>. In this diagram, the Light Independent Reaction is receiving and converting light energy into ATP and NADPH2. Then it is going through the Calvin cycle of the Light Dependent Reaction and oxygen is given off. Independent Reactions occur in the thylakoids or the membranous sections of the chloroplast. Bob the carbon atom is not involved in this step but he needs this step in order to progress High energy electrons are transferred through an electron transport chain to small energy receptor molecules called ADP and NADP. Also, oxygen molecules are being released into the air The ATP is being bonded to a phosphate group which then creates a ATP molecules. Then it transfers light-independent reactions to provide energy for the next phase. Light-Independent Reactions occur in the stroma of the chloroplasts During this process Bob's are “fixed” from CO2 to the carbon skeletons of existing organic molecules. Also six molecules of Bob are used to produce a single six-carbon glucose molecule. Bob keeps changing because as photosynthesis is taking place and energy is converting and transferring, the carbon atom is forced to change again and again. Glucose is made at the end of the process and Bob is released back into the air. This is the step where Bob is in between the process of photosynthesis and cellular respiration. Specifically, it is when carbon dioxide is given off because of photosynthesis. Then Bob will go onto the whole process of cellular respiration. Whew, photosynthesis is a long and complicated journey for Bob. There are three parts of cellular respiration: glycolysis, the Krebs Cycle, and the Electron Transport Chain. Glycolysis occurs in the cytoplasm, releases 2 ATP molecules, and no oxygen is required. The Krebs Cycle happens in the mitochondrial matrix, oxygen is required, and here Bob and some other carbons are released from glucose as carbon dioxide molecules. The Electron Transport Chain occurs in the Inner Membrane of a mitochondria and here during each turn of the cycle, two carbon atoms are removed from the substrates as CO2
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