12. Briefly discuss the role of the electron transport chain in cellular respiration. In your explanation‚ discuss and identify key molecules involved in this process and explain their relationship which each other in terms of how they contribute to the main cellular purpose of this process. Electron transport chain plays a key role of in the production of oxygen in cellular respiration. ETC uses many enzymes located on the inner mitochondrial membrane during the production of oxygen. The source
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The aim of this experiment was to investigate the effect that a glucose concentration has on the rate of fermentation. This was done by adding a variety of different glucose concentration into a test tube‚ siting in a water bath. The carbon dioxide would be collected in the test tube and therefore would measure the rate of fermentation. The results parsley supported the hypothesis that‚ “If the glucose concentration increases‚ the rate of fermentation increases‚ therefore the more carbon dioxide
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Review Questions Exam 2 Although I try to cover all materials thoroughly in these questions‚ anything covered in lecture may appear on the exam. Membrane Transport 1. Describe the cell permeability and membrane transport. What can enter/exit the cell on its own? What requires assistance? Why? 2. Describe membrane potential. What is it? How is it established? How does it influence the transport of charged molecules? What are the components of the electrochemical gradient?
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Glycolysis‚ the Krebs cycle (or citric acid cycle) and the Electron Transport Chain (ETC) are the three phases of cellular respiration used to completely catabolise glucose. a) Glycolysis occurs in the cytosol (or cytoplasm)‚ the Krebs cycle occurs within the Mitochondria (or mitochondrial matrix) and the Electron Transport Chain occurs on the Inner Mitochondrial Membrane (Cristae- fold). b) Anaerobic respiration occurs when low amounts of oxygen (02) are present‚ releasing low amounts of energy
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are three main parts; Glycolysis‚ Krebs Cycle‚ and Electron Transport Chain. All three of these processes form together to make cellular respiration happen‚ and that gives our bodies energy to do the work that we need to perform every single day. Without cellular respiration‚ our bodies would not have enough energy to perform everyday tasks‚ let alone live and survive. The first process‚ glycolysis‚ starts with a few molecules of glucose. There are two parts in glycolysis. The first is the Investment
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Metabolic pathways: An overview of cellular respiration and fermentation Chapter 6 Cellular respiration‚ photosynthesis occur in eukaryotic organelles (mitochondria‚ chloroplasts) CELLULAR RESPIRATION GLUCOSE 1 2 GLYCOLYSIS 1 PYRUVATE OXIDATION2 KREBS CYCLE 3 2 ELECTRON TRANSPORT 4 CHAIN 2 NET ATP PRODUCED = 36 Nelson‚ 2003 Redox Reactions • Reduction-oxidation reactions – Transfer electrons from donor to acceptor atoms • Donor is oxidized as it releases electrons
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Quiz Chapter 13: How Cells Obtain Energy From Food . The energy released by oxidizing glucose is saved in high energy bonds of: ATP and other activated carrier molecues 2. Sugars derived from food are broken down by: glycolysis‚ the citric acid cycle‚ and oxidative phosphorylation 3. Catabolism: a breakdown process in which enzymes degrade complex molecules into simpler ones 4. The digestion of polymeric food molecules into monomeric subunits occurs in: extracellular space (i.g. lumen of
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In this experiment‚ we strove to determine how effective different sugars were in fermentation by measuring their CO2 emissions. An increased CO2 production implies the substrate is undergoing glycolysis more often‚ resulting in increased ATP synthesis. For a more accurate interpretation of the results‚ glucose acted as a positive control‚ displaying the most efficiency in fermentation as shown in Figure 1 and Figure 2‚ while ethanol‚ which is a byproduct of fermentation‚ acted as a negative control
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molecules. There are actually two general types of respiration‚ aerobic and anaerobic. Aerobic respiration occurs in the presence of oxygen‚ while anaerobic respiration does not use oxygen. Both types of cell respiration begin with the process of glycolysis‚ after which the two
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Identify where sugar oxidation‚ substrate-level phosphorylation‚ and the reduction of NAD+ occur in glycolysis. Sugar oxidation/NAD+ reduction Performed by triose phosphate dehydrogenase 2 glyceraldehyde phosphate è 2 1‚3-bisphosphoglycerate + 2 NADH Substrate-level phosphorylation 2 1‚3-bisphosphoglycerate + 2 ADP è2 3-phosphoglycerate
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