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Sample pages 1 PDF
Sample pages 1 PDF

... Complexes I, III and IV are integrated in the membrane. In contrast, coenzyme Q (mediating capture of electrons by complex III) and cytochrome c are mobile, although the former is located within the membrane while the latter is found in the intermembrane space. The double-electron NAD dehydrogenase ...
Chapter 9: How do cells harvest energy?
Chapter 9: How do cells harvest energy?

... 1. occurs in mitochondria of eukaryotes, and on membrane surface in prokaryotes 2. electrons from NADH and FADH2 are transferred to a chain of membrane-bound electron acceptors, and eventually passed to oxygen  acceptors include flavin mononucleotide (FMN), ubiquinone, iron-sulfur proteins, cytochr ...
Chapter 2 Section 2: Cells capture and release energy
Chapter 2 Section 2: Cells capture and release energy

... Chapter 2.2a: Cells capture and release energy. (Photosynthesis) (7.1.b; 7.1.d) Vocabulary: chemical energy, glucose, photosynthesis, chlorophyll, cellular respiration; ...
Answers - U of L Class Index
Answers - U of L Class Index

... in Be would shield enough of the +4 nuclear charge (from the four protons in the nucleus) that the new electrons would feel as much repulsion from the four electrons as it would feel attraction to the nucleus. Thus, Be– would not form. ...
CHAPTERS 6 & 7
CHAPTERS 6 & 7

... – Energy is released in small amounts that can be captured by a biological system and stored in ATP ...
An element`s properties depend on the structure of its atoms
An element`s properties depend on the structure of its atoms

... • Atomic mass, the atom’s total mass, can be approximated by the mass number but is actually represented by an AVERAGE molecular mass based on the abundance of various isotopes. ...
The mitochondrial respiratory chain
The mitochondrial respiratory chain

... where oxygen is reduced to water. This chain of electron transfers provides the potential energy that powers the generation of the PMF and, hence, the formation within the matrix of ATP from ADP and phosphate. ADP and phosphate are driven into the matrix, and ATP out to the IMS (and hence to the cyt ...
Chemistry of Life
Chemistry of Life

... B.Energy in Reactions 1. Energy Changes 2. Activation Energy ...
Chapter 4 The Importance of High
Chapter 4 The Importance of High

... -needed free energy comes from the splitting (분열) of PPi group P~P Æ 2P (ΔG = -7 kcal/mole) -reactions with small, positive ΔG value are often part of important metabolic pathway in which they are followed by reactions with large negative ΔG value -single reaction never occurs independently, rather ...
Chapter 4 The Importance of High
Chapter 4 The Importance of High

... -needed free energy comes from the splitting (분열) of PPi group P~P Æ 2P (ΔG = -7 kcal/mole) -reactions with small, positive ΔG value are often part of important metabolic pathway in which they are followed by reactions with large negative ΔG value -single reaction never occurs in isolation, rather t ...
Chemistry 106: General Chemistry
Chemistry 106: General Chemistry

... is 1000 mmHg, the partial pressure of Neon gas is: (a) greater than the partial pressure of the Krypton gas (b) less than the partial pressure of the Krypton gas (c) the same as the partial pressure of the Krypton gas (33) The types of compounds that are most likely to contain covalent bonds is (a) ...
Chapter 2 - Trimble County Schools
Chapter 2 - Trimble County Schools

... • A hydrogen bond forms when a hydrogen atom covalently bonded to one electronegative atom is also attracted to another electronegative atom • In living cells, the electronegative partners are usually oxygen or nitrogen atoms ...
Principles of BIOCHEMISTRY - Valdosta State University
Principles of BIOCHEMISTRY - Valdosta State University

... • Catabolic reactions - degrade molecules to create smaller molecules and energy • Anabolic reactions - synthesize molecules for cell maintenance, growth and reproduction ...
Cellular Respirationx
Cellular Respirationx

... steps turn NADH and H+ back into NAD+, thus allowing glycolysis to continue.  Alcoholic fermentation is important economically. It is used in the production of beers and wines.  As the yeast ferment the sugars present in the mix, the ethanol content rises until it reaches a concentration high enou ...
Kinetic Mechanisms of Biological Regulation in Photosynthetic
Kinetic Mechanisms of Biological Regulation in Photosynthetic

... G. A photosynthetic complex contains several components, each of them can be presented in oxidized and reduced form, sometimes the components can also be in excited or protonized form. Thus the scheme of the states and their transitions for photosynthetic complex usually includes dozens of states. T ...
KATABOLISME KARBOHIDRAT
KATABOLISME KARBOHIDRAT

... established with few H+ in the matrix and many in the intermembrane space. The cristae also contain an ATP synthase complex through which hydrogen ions flow down their gradient from the intermembrane space into the matrix. The flow of three H+ through an ATP synthase complex causes a conformational ...
Photosynthesis
Photosynthesis

... Action of a photosystem Photophosphorylation is the process of converting energy from a light-excited electron into the pyrophosphate bond of an ADP molecule. This occurs when the electrons from water are excited by the light in the presence of P680. The energy transfer is similar to the chemiosmoti ...
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... catalyzes the reaction.  Rubisco is a slug, relatively speaking ...
The Producers
The Producers

... •  Dependent upon ATP & NADPH production from light rxns •  Light reactions ⇑ permeability of stromal membranes to cofactors (esp. Mg++) required for Calvin cycle enzymes •  Ferredoxin oxidized by light reactions reduces thioredoxin. Reduced thioredoxin coenzyme for Calvin cycle enzymes ...
313EnergyProduction
313EnergyProduction

... – stored as liver glycogen and muscle glycogen – blood glucose immediate energy • 38 ATP (70% of energy for ATP, 30% lost as heat ) – muscle glycogen depleted 20-30% with short, highintensity bout of exercise • depletion rate of 18.8 umol/g per minute • ? glycogen availability causes fatigue – moder ...
AP Midterm Study Guide
AP Midterm Study Guide

... Enzymes are used to lower the activation barrier on reactions and speed up reactions. This makes reactions use less amount of energy and hence create less heat. Enzymes have an active site where a substrate will attach into and cause it to change its shape allowing the enzyme to change the substrate ...
Year End Chemistry Review
Year End Chemistry Review

... 10. Fission vs Fusion. Describe each process and explain how atoms were made. 11. Place the following numbers into or take them out of scientific notation: a) 3,000,000 b) 321,000 c) 0.00000000248 d)74.3 e) 7.419 x 104 f) 9.16 x 10-8 12. How many valence electrons are in each of the following elemen ...
Using the Dynamic Learning resources
Using the Dynamic Learning resources

... The Publishers wish to thank the following for permission to reprint copyright material in this book, as listed below: Figure 5.28: Autumn crocus, an historic record of changing distribution – adapted from F.H. Perring and S.M. Walters (1976) Atlas of the British Flora, E P Publishing Ltd; Figure 5. ...
Chapter 7 Slides
Chapter 7 Slides

... 7.5 Overview: The two stages of photosynthesis are linked by ATP and NADPH 2. The second stage is the Calvin cycle, which occurs in the stroma of the chloroplast. – The Calvin cycle is a cyclic series of reactions that assembles sugar molecules using CO2 and the energy-rich products of the light re ...
a. to make the Elodea closer to the light b. so you could better see
a. to make the Elodea closer to the light b. so you could better see

... wolves killing their sheep. The wolves normally eat rabbits, and rabbits eat wild grasses and shrubs. When there aren’t enough rabbits, wolves move closer to ranches and take sheep. Which of these is the best hypothesis for finding a solution to this problem? Explain your ...
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Light-dependent reactions

In photosynthesis, the light-dependent reactions take place on the thylakoid membranes. The inside of the thylakoid membrane is called the lumen, and outside the thylakoid membrane is the stroma, where the light-independent reactions take place. The thylakoid membrane contains some integral membrane protein complexes that catalyze the light reactions. There are four major protein complexes in the thylakoid membrane: Photosystem II (PSII), Cytochrome b6f complex, Photosystem I (PSI), and ATP synthase. These four complexes work together to ultimately create the products ATP and NADPH.[.The two photosystems absorb light energy through pigments - primarily the chlorophylls, which are responsible for the green color of leaves. The light-dependent reactions begin in photosystem II. When a chlorophyll a molecule within the reaction center of PSII absorbs a photon, an electron in this molecule attains a higher energy level. Because this state of an electron is very unstable, the electron is transferred from one to another molecule creating a chain of redox reactions, called an electron transport chain (ETC). The electron flow goes from PSII to cytochrome b6f to PSI. In PSI, the electron gets the energy from another photon. The final electron acceptor is NADP. In oxygenic photosynthesis, the first electron donor is water, creating oxygen as a waste product. In anoxygenic photosynthesis various electron donors are used.Cytochrome b6f and ATP synthase work together to create ATP. This process is called photophosphorylation, which occurs in two different ways. In non-cyclic photophosphorylation, cytochrome b6f uses the energy of electrons from PSII to pump protons from the stroma to the lumen. The proton gradient across the thylakoid membrane creates a proton-motive force, used by ATP synthase to form ATP. In cyclic photophosphorylation, cytochrome b6f uses the energy of electrons from not only PSII but also PSI to create more ATP and to stop the production of NADPH. Cyclic phosphorylation is important to create ATP and maintain NADPH in the right proportion for the light-independent reactions.The net-reaction of all light-dependent reactions in oxygenic photosynthesis is:2H2O + 2NADP+ + 3ADP + 3Pi → O2 + 2NADPH + 3ATPThe two photosystems are protein complexes that absorb photons and are able to use this energy to create an electron transport chain. Photosystem I and II are very similar in structure and function. They use special proteins, called light-harvesting complexes, to absorb the photons with very high effectiveness. If a special pigment molecule in a photosynthetic reaction center absorbs a photon, an electron in this pigment attains the excited state and then is transferred to another molecule in the reaction center. This reaction, called photoinduced charge separation, is the start of the electron flow and is unique because it transforms light energy into chemical forms.
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