Bioenergetics1

Bioenergetics1 - BIOENERGETICS Copyright Cmassengale 1 What is Bioenergetics The study of energy in living energy systems systems(environments and

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Unformatted text preview: BIOENERGETICS Copyright Cmassengale 1 What is Bioenergetics? The study of energy in living energy systems systems (environments) and the organisms organisms (plants and animals) that utilize them Copyright Cmassengale 2 Energy Required by all organisms May be Kinetic or Potential energy Copyright Cmassengale 3 Kinetic Energy Energy of Motion Heat and light energy are examples Copyright Cmassengale 4 Potential Energy Energy of of position position Includes Includes energy stored in chemical bonds bonds Copyright Cmassengale 5 Two Types of Energy Reactions Copyright Cmassengale 6 Endergonic Reactions Chemical reaction that requires a net input of energy. Photosynthesis SUN photons Light Energy 6CO2 + 6H2O →C6H12O6 + 6O2 (glucose) Copyright Cmassengale 7 Exergonic Reactions Chemical reactions that releases energy releases Cellular Respiration Energy C6H12O6 + 6O2 → 6CO2 + 6H2O+ ATP (glucose) Copyright Cmassengale 8 Metabolic Reactions of Cells Copyright Cmassengale 9 What is Metabolism? The sum total sum of the chemical activities of all activities cells. cells Copyright Cmassengale 10 Two Types of Metabolism Anabolic Anabolic Pathways Pathways Catabolic Catabolic Pathways Pathways Copyright Cmassengale 11 Anabolic Pathway Metabolic reactions, which consume energy (endergonic), to consume (endergonic), build complicated molecules from build simpler compounds. light SUN energy Photosynthesis 6CO2 + 6H2O → C6H12O6 + 6O2 (glucose) Copyright Cmassengale 12 Catabolic Pathway Metabolic reactions which release energy (exergonic) by breaking energy (exergonic) down complex molecules in down simpler compounds energy Cellular Respiration C6H12O6 + 6O2 → 6CO2 + 6H2O + ATP (glucose) Copyright Cmassengale 13 Cellular Energy Cellular ATP ATP Copyright Cmassengale 14 ATP Components: 1. adenine: nitrogenous base 2. ribose: five carbon sugar 3.phosphate group: chain of 3 adenine phosphate group P P P ribose Copyright Cmassengale 15 Adenosine Triphosphate Three Three phosphate groups-(two groupswith high energy bonds energy Last phosphate group (PO4) group contains the MOST energy MOST Copyright Cmassengale 16 Breaking the Bonds of ATP Process is called phosphorylation phosphorylation Occurs continually in cells Enzyme ATP-ase ATP-ase can weaken & break last PO4 last bond releasing bond energy & free PO4 Copyright Cmassengale 17 How does ATP work ? Organisms use enzymes to enzymes break down energy-rich glucose to release its glucose potential energy This energy is trapped and stored in the form of adenosine triphosphate(ATP) triphosphate(ATP) Copyright Cmassengale 18 How Much ATP Do Cells Use? It is estimated that each cell each will generate and consume approximately 10,000,000 molecules of ATP per second per Copyright Cmassengale 19 Coupled Reaction - ATP The exergonic hydrolysis of ATP hydrolysis ATP is coupled with the endergonic dehydration H2O process by process transferring a transferring phosphate group phosphate to another H2O molecule. Copyright Cmassengale 20 Hydrolysis of ATP ATP + H2O → ADP + P (exergonic) Adenosine triphosphate (ATP) P P P Hydrolysis (add water) P P + P Adenosine diphosphate (ADP) 21 Copyright Cmassengale Hyrolysis is Exergonic Energy Energy Used by Cells Cells Copyright Cmassengale 22 Dehydration of ATP ADP + P → ATP + H2O ADP ATP (endergonic) (endergonic Dehydration (Remove H2O P P + P Adenosine diphosphate (ADP) Adenosine triphosphate (ATP) P Copyright Cmassengale P P 23 Dehydration is Endergonic Energy Energy is restored in Chemica Chemica l Bonds Copyright Cmassengale 24 Review Copyright Cmassengale 25 How many high energy How phosphate bonds does ATP have? have? Copyright Cmassengale 26 Which is true of photosyntheis? Anabolic Anabolic or Catabolic Catabolic Exergonic Or Endergonic Copyright Cmassengale 27 The breakdown of ATP is due The to: to: Dehydration H2O added or or Hydrolysis H2O removed Copyright Cmassengale 28 Which Reactions are often Which Coupled in Organisms Coupled Hydrolysis Anabolism Endergonic or BO T HDehydration or BO T H Catabolism or BO T H Copyright Cmassengale Exergonic 29 Ready for the test? If Ready not, review and try again!!! again!!! Copyright Cmassengale 30 ...
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This note was uploaded on 11/09/2011 for the course BIO 110 taught by Professor Harmon during the Winter '11 term at BYU.

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