ADP ATP and Cellular Respiration Copyright Cmassengale What
- Slides: 31
ADP, ATP and Cellular Respiration Copyright Cmassengale
What Is ATP? Energy used by all Cells Adenosine Triphosphate Organic molecule containing highenergy Phosphate bonds Copyright Cmassengale
Chemical Structure of ATP Adenine Base 3 Phosphates Ribose Sugar Copyright Cmassengale
What Does ATP Do for You? It supplies YOU with ENERGY! Copyright Cmassengale
How Do We Get Energy From ATP? By breaking the highenergy bonds between the last two phosphates in ATP Copyright Cmassengale
What is the Process Called? HYDROLYSIS (Adding H 2 O) H 2 O Copyright Cmassengale
How Does That Happen? An Enzyme! Copyright Cmassengale
How is ATP Re-Made? The reverse of the previous process occurs. Another Enzyme is used! ATP Synthetase Copyright Cmassengale
The ADP-ATP Cycle ATP Synthetase ATP-ase Copyright Cmassengale
When is ATP Made in the Body? During a Process called Cellular Respiration that takes place in both Plants & Animals Copyright Cmassengale
Cellular Respiration l l Includes pathways that require oxygen Glucose is oxidized and O 2 is reduced Glucose breakdown is therefore an oxidation-reduction reaction Breakdown of one glucose results in 36 to 38 ATP molecules Copyright Cmassengale
Overall Equation for Cellular Respiration C 6 H 12 O 6 + 6 O 2 YIELDS 6 CO 2 + 6 H 20 + e- + 36 -38 ATP’s Copyright Cmassengale
What Type of Process is Cellular Respiration? l An Oxidation-Reduction Process or REDOX Reaction l Oxidation of GLUCOSE --> CO 2 + H 2 O (e- removed from C 6 H 12 O 6) l Reduction O 2 to H 2 O (epassed to O 2) Copyright Cmassengale
What Carries the Electrons? l NAD+ (nicotinadenine dinucleotide) acts as the energy carrier l NAD+ is a coenzyme l It’s Reduced to NADH when it picks up two electrons and one Copyright Cmassengale hydrogen ion
Are There Any Other Electron Carriers? l YES! Another Coenzyme! l FAD+ (Flavin adenine dinucleotide) l Reduced to FADH 2 Copyright Cmassengale
Other Cellular Respiration Facts l Metabolic Pathway that breaks down carbohydrates l Process is Exergonic as High-energy Glucose is broken into CO 2 and H 2 O l Process is also Catabolic because larger Glucose breaks into smaller molecules Copyright Cmassengale
What are the Stages of Cellular Respiration? l Glycolysis l The Krebs Cycle l The Electron Transport Chain Copyright Cmassengale
Where Does Cellular Respiration Take Place? l It actually takes place in two parts of the cell: Glycolysis occurs in the Cytoplasm Krebs Cycle & ETC Take place in the Mitochondria. Copyright Cmassengale
Review of Mitochondria Structure l Smooth outer Membrane l Folded inner membrane l Folds called Cristae l Space inside cristae called the Matrix Copyright Cmassengale
Diagram of the Process Occurs across Cristae Occurs in Cytoplasm Occurs in Matrix Copyright Cmassengale
Glycolysis Summary Takes place in the Cytoplasm Anaerobic (Doesn’t Use Oxygen) Requires input of 2 ATP Glucose split into two molecules of Pyruvate or Pyruvic Acid Copyright Cmassengale
Glycolysis Summary Also produces 2 NADH • Pyruvate is oxidized to and CO 2 is removed • Copyright Cmassengale and 4 ATP Acetyl Co. A
Glycolysis Diagram Copyright Cmassengale
Fermentation v Occurs when O 2 NOT present (anaerobic) v. Called Lactic Acid fermentation in muscle cells (makes muscles tired) v. Called Alcoholic fermentation in yeast (produces ethanol) v. Nets only 2 ATP Copyright Cmassengale
A Little Krebs Cycle History Discovered by Hans Krebs in 1937 l He received the Nobel Prize in physiology or medicine in 1953 for his discovery l Forced to leave Germany prior to WWII because he was Jewish Copyright Cmassengale l
Krebs Cycle Summary l Requires Oxygen (Aerobic) l Cyclical series of oxidation reactions that give off CO 2 and produce one ATP per cycle l Turns twice per glucose molecule l Produces two ATP l Takes place in matrix of mitochondria Copyright Cmassengale
Krebs Cycle Summary l Each turn of the Krebs Cycle also produces 3 NADH, 1 FADH 2, and 2 CO 2 l Therefore, For each Glucose molecule, the Krebs Cycle produces 6 NADH, 2 FADH 2, 4 CO 2, and 2 ATP Copyright Cmassengale
Krebs Cycle ATP Copyright Cmassengale NETS: 3 NADH, 1 ATP, 1 FADH , & 2 CO
Electron Transport Chain Summary l 34 ATP Produced l H 2 O Produced l Occurs Across Inner Mitochondrial membrane l Uses coenzymes NAD+ and FAD+ to accept e- from glucose l NADH = 3 ATP’s l FADH 2 = 2 ATP’s Copyright Cmassengale
Electron Transport Chain Animation Copyright Cmassengale
Copyright Cmassengale
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- Explain how adp and atp are each like a battery
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