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Electron transport chain

Cell Respiration _ Find the words

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Cellular respiration
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Crista
Electron transport chain
Mitochondrion
Glycolysis
Carbohydrate catabolism

Cellular respiration .. Word Find During glycolysis, glucose is broken down to what 3 ? Carbon compound? __ __ __ __ __ __ __ __ __ __ __ During the electron transport chain, what is pumped from the matrix across the cristae into the intermembrane space? __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ This molecule is the primary fuel for cellular respiration. __ __ __ __ __ __ __ This type of respiration can only occur in the presence of oxygen. __ __ __ __ __ __ __ The Krebs?s cycle occurs in this part of the mitochondria. __ __ __ __ __ __ This molecule serves as a source of immediate energy for cellular processes that require energy. __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __

respiration respiration

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Oxidative phosphorylation
Electron transport chain
Citric acid cycle
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Adenosine triphosphate
Adenosine diphosphate

1 B io F actsheet January 1998 Number 12 Respiration Aerobic respiration can be divided into four stages: 1. Glycolysis (G) 2. The Link reaction (LR) 3. Kreb?s cycle (K) 4. The electron transfer chain (ETC) These take place in different parts of the cell (Table 1) and the detailed biochemistry of these reactions is shown overleaf. Respiratory quotients The respiratory quotient (RQ) is defined as the ratio of carbon dioxide produced to oxygen consumed per unit time by an organism: volume of CO2 produced volume of O2 consumed Different substances give different RQ values Cellular respiration is the process by which the energy contained in organic molecules is made available for all of the active

Ap bio cell respiration4 ppt

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Cellular respiration
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Electron transport chain
Oxidative phosphorylation
Chemiosmosis
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Cytochrome c oxidase
Adenosine triphosphate
Intermembrane space

Cellular Respiration Stage 4: Electron Transport Chain Cellular respiration What?s the point? The point is to make ATP! ATP ATP accounting so far? Glycolysis ? 2 ATP Kreb?s cycle ? 2 ATP Life takes a lot of energy to run, need to extract more energy than 4 ATP! A working muscle recycles over 10 million ATPs per second There?s got to be a better way! I need a lot more ATP! There is a better way! Electron Transport Chain series of proteins built into inner mitochondrial membrane along cristae transport proteins & enzymes transport of electrons down ETC linked to pumping of H+ to create H+ gradient yields ~36 ATP from 1 glucose! only in presence of O2 (aerobic respiration) O2 That sounds more like it! Mitochondria Double membrane outer membrane inner membrane

Ap bio cell respiration3 ppt

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Cellular respiration
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Citric acid cycle
Glycolysis
Adenosine triphosphate
Acetyl-CoA
Mitochondrion
Mitochondrial matrix
Electron transport chain
Nicotinamide adenine dinucleotide

Overview 10 reactions convert glucose (6C) to 2 pyruvate (3C) produces: 4 ATP & 2 NADH consumes: 2 ATP net: 2 ATP & 2 NADH glucose C-C-C-C-C-C fructose-1,6bP P-C-C-C-C-C-C-P DHAP P-C-C-C G3P C-C-C-P pyruvate C-C-C ATP 2 ADP 2 ATP 4 ADP 4 NAD+ 2 2 2Pi 2Pi 2H Cellular Respiration Stage 2 & 3: Oxidation of Pyruvate Krebs Cycle Glycolysis is only the start Glycolysis Pyruvate has more energy to yield 3 more C to strip off (to oxidize) if O2 is available, pyruvate enters mitochondria enzymes of Krebs cycle complete the full oxidation of sugar to CO2 pyruvate ? ? ? ? ? ? CO2 2x 6C 3C glucose ? ? ? ? ? pyruvate 3C 1C Cellular respiration Mitochondria ??Structure Double membrane energy harvesting organelle smooth outer membrane highly folded inner membrane cristae

Ap bio cell respiration1 ppt

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Nicotinamide adenine dinucleotide
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Citric acid cycle
Anaerobic respiration
Cofactor
Metabolism

Cellular Respiration Harvesting Chemical Energy ATP What?s the point? The point is to make ATP! ATP Harvesting stored energy Energy is stored in organic molecules carbohydrates, fats, proteins Heterotrophs eat these organic molecules ? food digest organic molecules to get? raw materials for synthesis fuels for energy controlled release of energy ?burning? fuels in a series of step-by-step enzyme-controlled reactions Harvesting stored energy Glucose is the model catabolism of glucose to produce ATP C6H12O6 6O2 ATP 6H2O 6CO2 ? + + + CO2 + H2O + heat fuel (carbohydrates) COMBUSTION = making a lot of heat energy by burning fuels in one step RESPIRATION = making ATP (& some heat) by burning fuels in many small steps CO2 + H2O + ATP (+ heat) ATP glucose

ATP Production

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ATP synthase

Mitochondria and Oxidative Phosphorylation Controlled oxidation of sugars Breaks down sugar in a number of small stepwise events = more efficient NADH and FADH2 carry energy in the form of high energy electrons Produce these molecules as a way to transport high energy electrons (Energy is stored as redox potential) These electrons will be transferred to the electron transport chain Glycolysis occurs in a stepwise process NADH is an energy carrier (energy will be harvested later) Some ATP is produced directly Most of the energy is still stored in pyruvate molecules Citric acid/tricarboxylic acid/Krebs cycle Oxidize pyruvate Yield for every 2 molecules of acetyl CoA: 2 GTP + 2 FADH2 + 6 NADH + 4 CO2

Biology Notes

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Electron transport chain
Nicotinamide adenine dinucleotide
Oxygen
Chemical bond
Technology

Biology Chapter 6 notes During cellular respirations: electrons are transferred to oxygen as carbon-hydrogen bonds of gloces are broken & hydrogen-oxygen bonds of water form Glucose loses hydrogen atoms as it is converted to carbon dioxide Oxygen gains hydrogen atoms in being converted to water Redox reaction: Electron transfer requires redox reactions for electrons to lose potential energy + release energy Oxidizing glucose: NAD+, dehygrenase Electron transport chain: electrons falling from glucose to oxygen, the transfer of electrons from an organic molecule to NADH Cellular respiration: Glycolysis (cytosol): break glucose into two molecules of pyruvate net product: NADH + ATP

cellular respiration

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Electron transport chain
Ethanol fermentation

STUDY GUIDE FOR CELLULAR RESPIRATION Cellular Respiration: Transfer of energy from organic compounds (especially GLUCOSE) to ATP. AEROBIC: cellular respiration WITH O2 ANEROBIC: cellular respiration WITHOUT O2 TWO STAGES OF CELLULAR RESPIRATION: STAGE 1: Glucose is converted to Pyruvate producing small amounts of ATP and NADH. STAGE 2: If O2, then: PYR and NADH make lots of ATP; if no O2, then Lactate or Ethanol and CO2 are produced. SEE FIGURE 10 FROM PAGE 104 IIN THE TEXTBOOK.

biology ch 9 guide

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Electron transport chain

Campbell's Biology, 9e (Reece et al.) Chapter 9 Cellular Respiration and Fermentation This is one of the most challenging chapters for students to master. Many students become overwhelmed and confused by the complexity of the pathways, with the multitude of intermediate compounds, enzymes, and processes. The vast majority of the questions in this chapter address central concepts rather than details of these pathways. Other questions have accompanying figures that provide details for reference and ask students to interpret or use these models. Overall, the emphases are on the inputs and outputs of each pathway, the relationships among these pathways, the cellular locations, redox as a central principle in respiration, and chemiosmosis. Multiple-Choice Questions
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