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Respiration ppt - mleonessciencepage
Respiration ppt - mleonessciencepage

... • Aerobic respiration - process that produces large amounts of ATP • Alcoholic fermentation – form of anaerobic respiration which involves the conversion of pyruvic acid to ethyl alcohol and carbon dioxide • Anaerobic - does not require oxygen • Cellular respiration - process in which cells make ATP ...
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PPT_Biochemistry_Short_Course

... the properties of water and biological molecules such as proteins • Allows blood (mostly H2O) to absorb and transport a large amount of nutrients • DNA’s alpha helix shape is due to hydrogen bonds between strands ...
espiration - WordPress.com
espiration - WordPress.com

... Mitochondria in muscle cells have more cristae than mitochondria in skin cells. Explain the advantage of mitochondria in muscle cells having more cristae. ...
Lab Exercise 7 - Cellular Respiration
Lab Exercise 7 - Cellular Respiration

... with water to form carbonic acid that in turn releases hydrogen ions (H+) as it dissociates. The hydrogen ions react with Bromthymol blue and cause it to turn from blue to green and then to yellow as more and more acid is produced/ more CO2 released. Procedure: (Figure 7.7). a) Place 15 drops (0.15m ...
Enzymes: “Helper” Protein molecules
Enzymes: “Helper” Protein molecules

... Enzymes aren’t used up  Enzymes are not changed by the reaction used only temporarily  re-used again for the same reaction with other molecules  very little enzyme needed to help in many reactions ...
Biology 1 Exam III F'04test.doc
Biology 1 Exam III F'04test.doc

... 12. An example of a structural polymer made entirely of glucose repeat units is/are: a. The cell membrane. b. Microtubules. c. The nuclear membrane. d. A ribosome. e. None of the above answers is/are correct. 13. The type of reaction commonly used to disconnect (break apart) the monomeric units of m ...
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... chemical resources by synthesizing more product than is needed. Instead, precursors can be used in other pathways. The localization of enzymes within a cell helps order metabolic pathways. A. A team of enzymes for several steps of a metabolic pathway may be assembled as a multienzyme complex. The pr ...
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... • Carbon skeleton enters breakdown pathways • Recall that the skeleton for any amino acid will be different than the next • 2-Carbon amino acids can be converted to acetyl CoA • 3-carbon amino acids can be converted to pyruvate • 4-carbon amino acids can be converted to one of the molecules used in ...
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... that reduce NAD+ to NADH and release carboxyl groups that form CO2 molecules. α-Ketoglutarate is the product of step three, and a succinyl group is the product of step four. CoA binds the succinyl group to form succinyl CoA. The enzyme that catalyzes step four is regulated by feedback inhibition of ...
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... This critical step puts the phosphate group at a very high energy state. ∆G o ’ for hydrolysis of an alcohol phosphate (such as 2-phosphoglycerate) is only -3 kcal/mol, whereas ∆G o ’ for the hydrolysis of an enol phosphate (such as phosphoenolpyruvate) is -14.8 kcal/mol. This large difference is d ...
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chemistry final - Madison Public Schools

... drops  a  raisin  into  the  glass.  After  a  few  minutes,  Thomas  says,  “No,  it  doesn’t  go  up  and   down  in  the  water.”  Ronika  closely  observes  the  raisins  in  the  two  cups  and  states,  “Look,   there  are ...
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... • Electrons are transferred from NADH or FADH2 to the electron transport chain • Electrons are passed through a number of proteins including cytochromes (each with an iron atom) to O2 • The electron transport chain generates no ATP • The chain’s function is to break the large freeenergy drop from f ...
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Chapter 1 • Lesson 4 Objectives 4

... Carbon dioxide in your blood combines with water to form carbonic acid. This reaction is so slow that if it were not catalyzed, carbon dioxide would build up in your bloodstream, which could be fatal. However, the blood contains carbonic anhydrase. This enzyme makes the reaction about 1 million time ...
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... 1. Electron behavior influences atom bonding. a. Electrons are attracted to protons but are repelled by other electrons. b. Orbitals are like volumes of space around the atomic nucleus in which electrons are likely to be at any instant. c. Each orbital contains one or two electrons. B. Orbitals can ...
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... composition of the saccharide moiety is cell type specific, depends on the developmental stage of the organism, or can change with the oncogenic state of a cell. The central and peripheral nervous systems are rich in many specialized lipids, but have a very low percentage of triglycerides (fat). Bra ...
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... 1. high E e- from NADH and FADH2 are passed to series of enzymes in the mitochondrial membrane 2. at the end of the chain, an enzyme combines electrons from the chain 3. with H ions from the cells fluid and O2 to form H2O. 4. O2 is the final electron acceptor, therefore O2 is necessary for obtaining ...
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Oxidative phosphorylation



Oxidative phosphorylation (or OXPHOS in short) is the metabolic pathway in which the mitochondria in cells use their structure, enzymes, and energy released by the oxidation of nutrients to reform ATP. Although the many forms of life on earth use a range of different nutrients, ATP is the molecule that supplies energy to metabolism. Almost all aerobic organisms carry out oxidative phosphorylation. This pathway is probably so pervasive because it is a highly efficient way of releasing energy, compared to alternative fermentation processes such as anaerobic glycolysis.During oxidative phosphorylation, electrons are transferred from electron donors to electron acceptors such as oxygen, in redox reactions. These redox reactions release energy, which is used to form ATP. In eukaryotes, these redox reactions are carried out by a series of protein complexes within the inner membrane of the cell's mitochondria, whereas, in prokaryotes, these proteins are located in the cells' intermembrane space. These linked sets of proteins are called electron transport chains. In eukaryotes, five main protein complexes are involved, whereas in prokaryotes many different enzymes are present, using a variety of electron donors and acceptors.The energy released by electrons flowing through this electron transport chain is used to transport protons across the inner mitochondrial membrane, in a process called electron transport. This generates potential energy in the form of a pH gradient and an electrical potential across this membrane. This store of energy is tapped by allowing protons to flow back across the membrane and down this gradient, through a large enzyme called ATP synthase; this process is known as chemiosmosis. This enzyme uses this energy to generate ATP from adenosine diphosphate (ADP), in a phosphorylation reaction. This reaction is driven by the proton flow, which forces the rotation of a part of the enzyme; the ATP synthase is a rotary mechanical motor.Although oxidative phosphorylation is a vital part of metabolism, it produces reactive oxygen species such as superoxide and hydrogen peroxide, which lead to propagation of free radicals, damaging cells and contributing to disease and, possibly, aging (senescence). The enzymes carrying out this metabolic pathway are also the target of many drugs and poisons that inhibit their activities.
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