Phytoplankton account for half of all photosynthetic activity on Earth.[2] Thus phytoplankton are responsible for much of the oxygen present in the Earth’s atmosphere – half of the total amount produced by all plant life.[3] Their cumulative energy fixation in carbon compounds (primary production) is the basis for the vast majority of oceanic and also many freshwater food webs (chemosynthesis is a notable exception). Since the 20th century‚ phytoplankton has declined by roughly 1% yearly‚ possibly linked
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(4) uses of energy in biological processes (B); active transport; muscle contraction; nerve transmission; synthesis; translocation; nitrogen fixation; receptors ENERGY TRANSFERS WHICH TAKE PLACE INSIDE LIVING ORGANISMS Living organisms including all plants and animals require energy for their cellular processes. In biological processes‚ the immediate energy source is often in the form adenosine triphosphate (ATP). The nucleotide ATP maintains both catabolic and anabolic reactions. An example of
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MCB300 Exam 2 1. Which of the following statements is false? a. ATP synthase is found in all living organisms b. ATP synthase is a redox-driven proton pump c. ATP synthase can use proton motive force (PMF) to drive ATP synthesis d. ATP synthase can hydrolyze ATP to generate proton motive force (PMF) e. The Boyer model describes how rotary motion is used to synthesize ATP in ATP synthase 2. Which of the following is not associated with photosynthesis? a. Use of bacteriorhodopsin as a light-driven
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Presence of nitrogen fixing Klebsiella pneumoniae in the gut of the Formosan subterranean termite (Coptotermes formosanus) (p3297) A Review by: Mark Edge (Faith & Jaelen Love You) Because the Formosan termite is an economically important pest. Researchers are concentrating efforts on understanding the details of their physiology. Before the late 80’s early 90’s not much physiological research was concentrated toward any one species of termite outside of general physical characteristic‚ anatomy
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1 CHM 1321-C Final Exam (prof. S. Gambarotta) Your Name: ___________________ April 12– 2013 Student #: ______________ 1. Solution key will be posted today on the web to day. 2. You must respond correctly to the first 41 exercises (1 mark each) to get the full mark. 3. There are 3 bonus questions at the end (4 mark each). In case of correct answers‚ each will add 4 marks to whatever you scored from the non-bonus questions. 4. Deliver the entire booklet 2 1) How many π bonds are present in
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Site hosted by Angelfire.com: Build your free website today! ESSAY: Using examples from the industrialised and developing world‚ explain how and why we should conserve woodlands & forests Forests and woodlands provide many social‚ economic‚ and environmental benefits. In addition to timber and paper products‚ forests provide a wildlife habitat and recreational opportunities‚ prevent soil erosion and flooding‚ help provide clean air and water‚ and contain tremendous biodiversity
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Cellular Respiration 1995: Energy transfer occurs in all cellular activities. For 3 of the following 5 processes involving energy transfer‚ explain how each functions in the cell and give an example. Explain how ATP is involved in each example you choose. Cellular movement Active transport Synthesis of molecules Chemiosmosis Fermentation 1982: Describe the similarities and differences between the biochemical pathways of aerobic respiration and photosynthesis in eukaryotic cells. Include
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INTRODUCTION Cement is a binder‚ a substance that sets and hardens independently‚ and can bind other materials together. The word "cement" traces to the Romans‚ who used the term opus caementicium to describe masonry resembling modern concrete that was made from crushed rock with burnt lime as binder. The volcanic ash and pulverized brick additives that were added to the burnt lime to obtain a hydraulic binder were later referred to as cementum‚ cimentum‚ cäment‚ and cement. Cement is made by grinding
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which several targets for future improvement can be identified. Some are already the focus of genetically modified (GM) and non-GM approaches. However‚ the efficient growth strategies of perennial bioenergy crops rely on newly assimilated and recycled carbon and remobilized nitrogen in a continually shifting balance between sources and sinks. This balance is affected by biotic (e.g. pest‚ disease) and abiotic (e.g. drought) stresses. Future research should focus on three main challenges: changing (photo)thermal
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Question 2 a.) Rubisco is a key component in photosynthesis. It is an enzyme involved in the fixation of atmospheric carbon dioxide. b.) Due to global warming‚ the increased temperature can influence Rubisco which can catalyses oxygenation over carboxylation. During carboxylation CO2 is fixed and raised temperature enhancing oxygenation. c.) Level of PGA depends on Rubisco with who is going to bind. Rubisco is an enzyme that reacts with CO2 and O2. The reaction with O2 competes with carboxylation
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