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Similarities between Photosynthesis and Cellular Respiration

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megan Slovenski

on 25 November 2014

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Transcript of Similarities between Photosynthesis and Cellular Respiration

Cellular Respiration and Photosynthesis both have an ATP Synthase. These processes both have buildups of H+ and the ATP Synthase transports the hydrogen ions down the concentration gradient. This process is called Chemiosmosis.
Similarities between Photosynthesis and Cellular Respiration
Photosynthesis and Cellular Respiration
Cellular Respiration and Photosynthesis are both metabolic pathways. This means that the products created in Cellular Respiration are the reactants in Photosynthesis. While the products created in Photosynthesis are the reactants in Cellular Respiration. They are also metabolic pathways within themselves. In Photosynthesis, the products from the first phase (NADPH and ATP) are used in the second phase of Photosynthesis as a source of energy. In Cellular Respiration some products of glycolysis, intermediate step, Krebs Cycle are the reactants in Oxidative Phosphorolation.
Type of Process
Cellular Respiration and Photosynthesis both create entropy. This is the measure of disorder in a system. In these processes entropy is increased in the form of thermal energy
Waste Products
Cellular Respiration and Photosynthesis both have an Electron Transport Chain.This means that both processes have electron carriers to move electrons down a membrane.
By; Paige Hassett and Megan Slovenski
Differences between Photosynthesis and Cellular Respiration
In Photosynthesis there are 2 phases, the Light-Dependent phase and the Light-Independent phase. The Light dependent phase takes place in the thylakoid and use photons as energey. The light independent phase takes place in the stroma and makes glucose by making carbon bonds.
In Cellular Respiraton there are 3 phases and an Intermediate step. The first phase of Cellular Respiration is Glycolysis. The second phase of Cellular Respiration is called the Krebs Cycle or the Citric Acid Cycle. The third phase is the Electron transport phase and Oxidative Phosphorolation. The Intermediate step is inbetween Glycolysis and the Krebs Cycle. The Intermediate step turns the product of Glycolysis(pyruvate) into a useable source of Acetyl coA for the Krebs Cycle.
Amount of Phases
Photosynthesis takes place in the Chloroplasts. Phase 1 of Photosynthesis(light dependent) takes place in the thylakoid membrane and space of the thylakoid, within the chloroplast. The second phase of Photosynthesis takes place in the stroma(everywhere but the thylakoid), still within the chloroplast.
Cellular Respiration takes place in the Mitochondria. Phase 1 of Cellular Respiration(glycolysis) takes place in the cytoplasm, surrounding the mitochondria. The second phase is the Intermediate step which takes place within the Mitochondria, in the Mitochondrial Matrix. The third phase of Cellular respiration(Krebs Cycle) takes place in the Mitochondrial Matrix as well. The Fourth and final phase of Cellular Respiration takes place in the Inner Mitochondrial Membrane.
Place Which Process Takes place
In Photosynthesis, the final electron acceptor is Ferrodoxin. The ferrodoxin takes the electrons from the excited photosystems and the split H2O molecule and uses the electrons to create NADPH. Which goes onto the second phase of Photosynthesis to create Glucose.
In Cellular Respiration, the final electron acceptor is Oxygen. The O2 takes the electrons from the 2NADH from glycolysis, 2NADH from the Intermediate step and 6NADH and 2FADH2 from the Krebs cycle. The O2 bonds with the electrons, creating H2O.
Final Electron Acceptor
Anabolic v.s Catabolic
ETC
Photosynthesis is an anabolic pathway which means the process takes smaller molecules and creates larger molecules. Photosynthesis takes CO2, H2O and Sun energy to form the larger molecule of Glucose and O2.
Cellular Respiration is a catabolic pathway which means the process takes larger molecules and breaks it down, creating smaller molecules. Cellular Respiration takes Glucose and O2 and breaks down the Glucose into ATP, H2O and CO2
ATP Synthase
Need for These Processes
Cellular Respiration and Photosynthesis both are needed for plants to carryout life. With out these two process the other could not happen because they provide reactants for the other to run
Cellular Respirations Equation
C6 H12 O6 + 6O2 6H2O + 6CO2 + Energy
Photoysnthesis Equation is
6CO2 + 6H2O C6 H12 O6 +6O2
Electron Carriers
Photosynthesis uses one type of electron carrier throughout the whole process. The electron carrier that is used is NADPH. The NADPH is produced by Ferrodoxin when an electron bonds with NADP+.
Cellular Respiration uses two types of electron carriers throughout the process. The electron carrier that is used to reach the final phase of ETC or Oxidative Phosphorolation in all phases of Cellular respiraton is NADH. The second electron carrier that is used can only be created in the Krebs Cycle, that Electron carrier is FADH2.
Why Cellular Respiration and Photosynthesis are Metabolic Pathways
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