and can be utilised by the body to stay alive. Oxygen is used to produce ATP for energy “the principle energy transferring molecule in living systems”(Anatomy and Physiology‚ Seeley‚ Stephens‚ Tate). Oxygen is essential to produce ATP. Internal respiration refers to the intracellular metabolic processes carried out within the mitochondria‚ which use O2 and produce CO2 during the derivation of energy from nutrient molecules. It involves the exchange of gases within the body. Blood vessels serve as
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produce a gas when sugar is available. For the third hypothesis‚ we did not expect yeast to produce a gas when no sugar or other food is available. The reason is that carbon dioxide is a product of respiration and is formed when the yeast respires. Therefore‚ when no food and sugar is available‚ respiration cannot take place. Hence‚ no carbon dioxide is formed.
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Botany Exercise 1 – Microscopy A. The Compound Microscope microscope – optical instrument consisting of a system of specially ground lenses that gives sharp‚ distinct‚ and highly magnified images of minute objects. compound microscope will be used. o two lenses: eyepiece + objective lenses o inverted image base coarse adjustment knob fine adjustment knob revolving nosepiece objective lenses stage stage clips stage opening condenser iris diaphragm mirror U-shaped platform that supports
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of two ATPs are produced as the process uses two ATPs and produces four. Glycolysis consists of ten chemical reactions; each reaction is catalysed using a different enzyme. Oxygen is not required during glycolysis so it is considered anaerobic respiration. Glycolysis must be regulated so that energy is produce only when required. During glycolysis there are three enzymes that catalyse or inhibit the rate of reaction. These are hexokinase‚ phosphofructokinase and pyruvate kinase. During the first
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Cellular Reaction 1. Free Energy Change 2. Calories 3. Exergonic Reactions 4. Endergonic Reactions C. Oxidation and Energy Production 1. Oxidation 2. Reduction D. Biochemical Pathways for Glucose Catabolism 1. Aerobic Respiration Page 1 2. Anaerobic Respiration 3. Fermentation E. Catabolism of Other Macromolecules 1. Catabolism of Lipids 2. Catabolism of Proteins F. Photosynthesis Page 2 BIO 2924 Mr. Smith Unit III Enzymes An enzyme is an organic catalytic agent produced
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Chapter 6-Intro to Metabolism METABOLISM= all the chemical reactions in an organism CATABOLIC PATHWAY (CATABOLISM)• release of energy by the breakdown of complex molecules to simpler compounds EX: digestive enzymes break down food ANABOLIC PATHWAY (ANABOLISM) • consumes energy to build complicated molecules from simpler ones EX: linking amino acids to form proteins ORGANISMS TRANSFORM ENERGY ENERGY- capacity to do work KINETIC ENERGY- energy of moving objects POTENTIAL ENERGY- energy
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ATP and its Role in Living Organisms An exemplary biology essay ATP (adenosine triphosphate) is vital to living organisms. It acts as a short-term store of energy in a cell‚ carrying it from where it is synthesised (e.g. the mitochondria) to where it is needed for biological processes. It is well suited to this job for the following reasons: it is small and soluble (and so can be easily transported around a cell); it is easily broken down to release energy; it can transfer energy to other molecules;
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What is Krebs cycle? The Krebs cycle‚ also known as the Citric Acid cycle‚ is a very important process in cellular respiration. Without this portion‚ respiration would not be possible. This is because the Krebs cycle uses the pyruvate molecules from glycolysis to produce high energy molecules essential for the electron transport chain (ETC) which follows soon after. Described by Hans Adolf Krebs in 1937 A feature of cell chemistry shared by all types of life. A complex series of reactions beginning
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CE BIO 1994 1. (a) (i) The formation of red precipitate indicates the presence of reducing sugar (glucose) in the water ------------------------------------------------------------------- 1 This shows that the dialysis tubing is permeable to glucose / permits the diffusion of glucose into the external solution ------------------------------------------ 1 (ii) (1) Increased amount of precipitates in set-up a indicates the presence of more reducing sugar -------------------------------------------------------------
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A cyclist rides her bike up a very steep hill. Which choice below properly describes this example in energetic terms? Both a) and d) are correct. Every time a source of energy is converted from one form to another: some of the energy is converted to heat‚ which is not a very usable form of kinetic energy. A green plant will grow if given nothing more than: water‚ light‚ and carbon dioxide The leaves of plants can be thought of as "eating" sunlight. From an energetic perspective this makes
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