electron carriers to the next stage. The citric acid cycle occurs only when oxygen is present in the mitochondrion after the cell splits during the first phase glycolysis. What is the role of the electron transport system? Include the reactants and the products. Where does it occur? The electron transport system is the final stage in cell respiration. The main role is to transport electrons formed from NADH to oxygen in order to release the energy cells use to make ATP. Photosynthesis:
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two interlinked reactions‚ which are light dependent reactions and light independent reactions. Throughout our lab experiment‚ we focused on the affect access of light has on carbon dioxide during photosynthesis. Carbon dioxide levels decrease as oxygen levels increase and glucose is produced when light dependent reactions occur. Light energy is absorbed by photo pigments and is used to raise a electron to a higher energy state. The electron is
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1. The graph shows the pattern of breathing in a person sitting at rest. (a) (i) What is the name given to the volume of air labelled A? .......................................................................................................................... (1) (ii) Explain how you would calculate the volume of air taken into the lungs in one minute. .......................................................................................................................... ........
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Introduction: Enzymes are proteins that enable chemical reactions. In the enzyme lab‚ the effects of concentration‚ temperature and pH on the functionality of the enzyme catalase. The enzyme lab was also about measuring reactions by capturing the oxygen that was generated by the reaction. Materials and Methods: Experiment 1‚ 2‚ & 3 Experiment 1 examined the effects of concentration on catalase activity. Experiment 2 examined the effects of concentration in temperature on catalase activity
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contraction of muscles‚ build up of larger molecules (e.g. proteins)‚ maintains steady body temperature (homeostasis) * Aerobic: * needs oxygen * only occurs when a certain amount of oxygen is available * C6H12O6 + 6O2 6CO2 + 6H2O + Energy * releases large amount of energy (2900 KJ) * Anaerobic: * without oxygen * [glucose lactic acid] C6H12O6 2C3H6O3 * releases small amount of energy (120 KJ) * poisonous waste (lactic acid) removed
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found on earth Archaea are single cell micro-organisms with no nucleus‚ it use anaerobic respiration (able to living in the absence of Oxygen) and live in extreme environment/condition such as high temperature‚ acid-rich‚ saline area etc. those environment are rich in minerals but hazardous to other organisms. Archaea’s population decreased after earth filled with oxygen‚ other than that‚ current archaea is very same as ancient archaea. Archaea like to live near Black Smoker (volcanoes under ocean)
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Changes to the Earth and its atmosphere (http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/oils/changesrev1.shtml) Our changing planet 1 a Match a word from the list with each of the labels A‚ B‚ C and D on the diagram of the Earth. atmosphere core crust mantle [pic] A= core B= mantle C=crust D=atmosphere (4) b From which parts of the Earth do we get all of our raw materials? A atmosphere‚ core and crust B atmosphere‚ crust
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I: steel wool tweezers vinegar small jar or drinking glass water small bowl Part II: hydrogen peroxide small pieces of raw potato (yeast or beef liver may be substituted for the potato) small bowl Procedures: Part I: Reaction between iron and oxygen 1. Break off a small piece of steel wool and soak it in vinegar for at least one minute. Use tweezers to push the steel wool around to remove all bubbles. 2. Using the tweezers‚ lift the steel wool out of the vinegar and shake if gently over a paper
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young woman pulled out of the water after a near drowning finds it painful to take in and expel air. All of the patients described above need assistance getting sufficient amounts of oxygen into their lungs and out to their cells. When a patient has trouble breathing and utilizing the precious resource‚ oxygen‚ a specialist called a respiratory therapist is often called upon to provide treatment and support. Without
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charged nitrogen from nitric acid attaching it to the molecule. The nitrogen’s electrons are then kicked off on to the oxygen bearing a positive charge‚ creating water. This process formed an organic nitrate. Next‚ water is used to abstract hydrogen from the positively charged oxygen‚ forming hydronium. A carbonyl is formed as well as nitrogen dioxide gas. Simultaneously the oxygen separates itself from nitrogen dioxide by pushing its electrons onto the positively charged nitrogen. This forms benzil
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