REVIEW SHEET‚ EXAM 3 Chapter 6‚ Nutrition and Microbial Growth Define the four major modes of nutrition in microorganisms and distinguish among them in terms of energy and carbon sources The four major modes of nutrition are: 1. Photoautotrophs: (ex. Plants‚ some protozoa‚ & alegae) -microorganism which use carbon dioxide as a carbon source and light energy from the environment to make their own food. 2. Chemoautotrophs: -microorganism which uses carbon dioxide as a carbon source and
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nodule ? 12.All elements that are present in a plant need not be essential to its survival. Comment. 13.Why is the colour of a leaf kept in dark frequently yellow‚ or pale green ?which pigment do you think is more stable. 14.Differentiate between respiration and combustion ? 5 marks questions- 15.Why do c3 plants suffer from photo respiratory losses ? Explain the mechanism of photo respiratory mechanism. 16.Describe the electron transport system operating in mitochondria. 17.What do you understand
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10.19.2011 TITLE: The Importance of Oxygen for Life PURPOSE: To determine whether test tubes filled with bacteria‚ a few salts‚ distilled water‚ and glucose would grow in the presence or absence of oxygen. By adding oxygen to certain tubes and withholding it from other tubes‚ one can determine which bacteria grow the most efficiently. HYPOTHESIS: The test tubes of bacteria with oxygen will grow and thrive over the test tubes without oxygen. METHODS: Using the data shown in Table 7-A-1
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of fermentation increases‚ therefore the more carbon dioxide released”. Background All cells need to obtain energy through the breakdown of organic molecules such as glucose. This process is known as respiration. When cells find it difficult to obtain oxygen that they need for aerobic respiration‚ the process
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Respiration: How Cells Harvest Chemical Energy 1. A cell must work just to maintain its complex structure‚ for order is intrinsically unstable. Because of entropy (the second law of thermodynamics)‚ which states that any enclosed system tends toward disorganization‚ cells must constantly use energy to keep themselves in order. If the cell was to stop using energy and let itself go then it would eventually get so disorganized that it wouldn’t function properly. 2. With the help of enzymes‚ the
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ATP Synthase: The World’s Smallest Motor Adenosine triphosphate (ATP) is a coenzyme produced in cellular mitochondria and is not only integral to cellular metabolism but also to life. The mitochondrial production of ATP‚ which occurs through a complex process called oxidative phosphorylation‚ has been determined to rely heavily on the enzyme ATP synthase. This determination was the result of a complex experiment that attempted to prove not only that ATP synthase was responsible for production
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bacteria that reduces sulfate is also important in aerobic environments and for the ecology‚ for example‚ in oceanic sediments and aerobic black water treatment Sulfate reducers such as thermosulfobacteria have a wide range of cellular forms‚ some are rods‚ vibrios‚ ovals‚ spheres and tear dropped shaped cells. Some are motile‚ others aren’t. Many sulfate reducing bacteria are mesophilic‚ and only a few thermophilic bacteria are known. In conclusion‚ thermosulfobacteria
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Primary Source Review #1 Title: Age-associated decreased activities of mitochondrial electron transport chain complexes in heart and skeletal muscle: role of L-carnitine Authors: Kumaran S.‚ Subathra M.‚ Balu M.‚ Panneerselvam C. Journal: Chemo-Biological Interactions Vol. 148 Pgs. 11-18 Date: 2004 Instructions: You may work together on this assignment and turn it in as a group or individually. You will need to use resources such as the internet in addition to your textbook and the article
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Plants play an essential role within the earth’s eco-system‚ being primary producers of chemical energy‚ to gain a greater knowledge on how plants are essential to all living things‚ cellular structure must first be understood. Cellular Structure of a Plant: The cellular structure of a plant is instrumental in shaping the overall construction of a plant and the way in which life functions are performed. The cells found within a plant are known as Eukaryotic Cells‚ as they
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Increased production of CO2 is a result of increased temperatures acceleration of the rate of fermentation. Abstract: We have tested the affects of increased temperature above room temperature on the rate of fermentation of yeast. We had 6 flasks filled with 6mL DI water‚ 2mL Yeast suspension and 6mL glucose of which 3 were at 25°C and 3 were at 37°C. The flasks at 37°C had each mixture pre-heated at 37°C for 2 minutes before being combined and then added to the flask where it was put into the
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