cellular respiration

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cellular respiration

Glycolysis

Citric acid cycle

Chemiosmosis

Adenosine triphosphate

metabolism

Nicotinamide adenine dinucleotide

Beta oxidation

Fermentation

0 7 Cellular Respiration and Fermentation Overview: Life Is Work that Requires Energy Living cells require energy from outside sources Some animals, such as the giraffe, obtain energy by eating plants, and some animals feed on other organisms that eat plants ? 2014 Pearson Education, Inc. Energy flows into an ecosystem as sunlight and leaves as heat Photosynthesis generates O2 and organic molecules, which are used as fuel for cellular respiration Cells use chemical energy stored in organic molecules to regenerate ATP, which powers work ? 2014 Pearson Education, Inc. Animation: Carbon Cycle Carbon Cycle Figure 7.2 Light energy ECOSYSTEM Photosynthesis in chloroplasts CO2 ? H2O Cellular respiration in mitochondria Organic molecules ? O2 ATP ATP powers most cellular work Heat

Cell bio chapter 9

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metabolism

Fermentation

Technology

Energy flow and chemical recycling in ecosystems Metabolic pathways involved in harvesting the energy of glucose Glycolysis and cellular respiration Glycolysis and fermentation Concept 9.1 How do metabolic pathways yield energy? Redo reactions: chemical reactions that transfer electrons Oxidation: substance loses electrons Reduction: substance gains electrons Oxidation of organic molecules during cellular respiration Nicotinamide Adenine Dinucleotide- electron carrier/acceptor NADH passes electrons to the electron transport chain when O2 is present Cellular respiration occurs in the mitochondria Stages of cellular respiration Glycolysis occurs in cytoplasm Breaks down glucose with end product being pyruvic End process pyruvic goes to citric acid cycle

Cell Bio chapter 8

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Non-competitive inhibition

Enzymes

Enzyme

ATP hydrolysis

Concept 8.1 What is energy? Potential energy = stored energy Chemical bonds Concentration gradients (can be used to do cellular work) Electrical potential Kinetic energy = movement energy Heat = molecular motion Mechanical = moving molecules past each other Electrical = moving charged particles Forms of energy Biker at top of hill potential Biker going down hill kinetic Why do cells need energy? Synthetic work = building macromolecules (e.g., making protein) mechanical work = moving molecules past each other e.g., muscle shortening concentration work = creating chemical gradients e.g. storing glucose electrical work = creating ion gradients e.g., unequal distribution of sodium and potassium ions Metabolic pathways Catabolic pathways ? release energy

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redox

Chapter 9: Cellular Respiration?Harvesting Chemical Energy Concept 9.6 (176 ? 178) is not required knowledge for the AP? exam and is omitted. Overview: Life Is Work living cells require transfusions of energy from outside sources to perform their tasks energy enters into an ecosystem as sunlight and leaves as heat Concept 9.1: Catabolic pathways yield energy by oxidizing organic fuels Catabolic Pathways and Production of ATP breakdown of organic molecules is exergonic fermentation is a partial degradation of sugars that occurs without oxygen cellular respiration is the most prevalent and efficient catabolic pathway consumes oxygen and organic molecules (i.e. glucose) yields ATP to keep working, cells must regenerate ATP Redox Reactions: Oxidation and Reduction

Campbell Biology Chapter 9 Outline

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Chemiosmosis

Citric acid cycle

Mitochondrial matrix

metabolism

Technology

Mica Piro Chapter 9: Cellular Respiration & Fermentation Catabolic Pathways Yield Energy by Oxidizing Organic Fuels (9.1) Catabolic Pathways and Production of ATP Organic compounds possess potential energy as a result of the arrangement of electrons in the bonds between their atoms Compounds that can participate in exergonic reactions can act as fuels Through enzyme activity, a cell systematically degrades complex organic molecules that are rich in potential energy to simpler waste products that have less energy (some energy used to do work; the rest is released as heat) One catabolic process called fermentation is a partial degradation of sugars or other organic fuel that occurs without the use of oxygen

Campbell Biology Chapter 8 Outline

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Enzymes

Enzyme

Adenosine triphosphate

ATP hydrolysis

Mica Piro Chapter 8: An Introduction to Metabolism An organism?s Metabolism Transforms Matter and Energy, Subject to the Laws of Thermodynamics (8.1) The totality of an organism?s chemical reactions is called metabolism It is an emergent property of life that arises from orderly interactions between molecules Organization of the Chemistry of Life into Metabolic Pathways A metabolic pathway begins with a specific molecule, which is then altered in a series of defined steps, resulting in a certain product Each step is catalyzed by a specific enzyme Metabolism as a whole manages the material and energy resources of the cell Some pathways release energy by breaking down complex molecules to simpler compounds?these degraditive processes are called catabolic pathways, or breakdown pathways

AP BIO Chapter 09

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Citric acid cycle

Nicotinamide adenine dinucleotide

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

AP BIO CHP 9 CAMPBELL BIOLOGY 9e

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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

AP Bio Review

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AP BIOLOGY SEMESTER 1 EXAM REVIEW UNIT 1: MECHANISMS OF EVOLUTION Darwinian Evolution Evidence Paleontology, biogeography, embryology, comparative anatomy, homologous structures, analogous structures, vestigial structures, molecular biology, artificial selection Natural Selection Over-production of offspring, inherited variation, competition, adaptations, fitness, reproductive success of advantageous traits Stabilizing selection (human birth weight, extremes selected against - too small won?t survive, too big difficult birth), directional selection (pesticide resistance, peppered moth), disruptive selective (opposite of stabilizing), sexual selection (male competition, female choice)

AP Bio Review

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