Cellular respiration

Rating:

No votes yet

SocialTags:

Cellular respiration

Biochemistry

Cell biology

Chemiosmosis

Crista

Mitochondrion

Cytochrome c oxidase

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

Subject:

Rating:

No votes yet

SocialTags:

Acetyl-CoA

Mitochondrion

Mitochondrial matrix

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 respiration2 ppt

Subject:

Rating:

No votes yet

SocialTags:

1,3-Bisphosphoglyceric acid

Ethanol fermentation

Cellular Respiration Stage 1: Glycolysis What?s the point? The point is to make ATP! ATP Glycolysis Breaking down glucose ?glyco ? lysis? (splitting sugar) ancient pathway which harvests energy where energy transfer first evolved transfer energy from organic molecules to ATP still is starting point for ALL cellular respiration but it?s inefficient generate only 2 ATP for every 1 glucose occurs in cytosol glucose ? ? ? ? ? pyruvate 2x 6C 3C In the cytosol? Why does that make evolutionary sense? That?s not enough ATP for me! Evolutionary perspective Prokaryotes first cells had no organelles Anaerobic atmosphere life on Earth first evolved without free oxygen (O2) in atmosphere energy had to be captured from organic molecules in absence of O2

Ap bio cell respiration1 ppt

Subject:

Rating:

No votes yet

SocialTags:

Cellular respiration

Biochemistry

Redox

Nicotinamide adenine dinucleotide

Bioenergetics

Glycolysis

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

Ch 7 Study Guide

Subject:

Rating:

No votes yet

SocialTags:

Chemiosmosis

Carbohydrate catabolism

AP Biology Name ____Ryan Hanssens_______ Chapter 9 Guided Reading Assignment ?Hint: review the concept check questions ? these are great quick quiz questions!? Define the two catabolic pathways: Fermentation ? a partial degradation of sugars that occurs without the use of oxygen? Cellular respiration ? when oxygen is consumed as a reactant along with the organic fuel; most efficient catabolic pathway; mitochondria house most of the metabolic equipment needed ??

Campbell Biology 9th Edition - Ch. 8 Metabolism

Subject:

Rating:

No votes yet

SocialTags:

Enzymes

Product

Non-competitive inhibition

CHAPTER 8 An Introduction to Metabolism Metabolism is the totality of an organism?s chemical reactions Manage the materials and energy resources of a cell Catabolic pathways release energy by breaking down complex molecules into simpler compounds Eg. digestive enzymes break down food ? release energy Anabolic pathways consume energy to build complex molecules from simpler ones Eg. amino acids link to form muscle protein ENERGY = CAPACITY TO DO WORK Kinetic energy (KE): energy associated with motion Heat (thermal energy) is KE associated with random movement of atoms or molecules Potential energy (PE): stored energy as a result of its position or structure Chemical energy is PE available for release in a chemical reaction Energy can be converted from one form to another

Molecular Bionumbers Notes

Subject:

Rating:

No votes yet

SocialTags:

DNA

Useful fundamental numbers in molecular biology The numbers quoted here were extracted from the literature. They should only serve as ?rule of thumb? values. Consult the full references to learn about the specific system under study, growth conditions, measurement method etc. Full references at: www.bioNumbers.org Cell sizes: Bacteria (e.coli): ~1mm diameter, 2mm length, ~1mm3 in volume; 109cells/ml in an overnight culture (OD600~1) Yeast (Saccharomyces cerevisiae): ~5 mm diameter, ~50 mm3 in volume Mammalian (HELA) cell - ~2,000 mm3 in volume, adherent cell on a slide ~20 mm diameter ? ~100,000 cells in a confluent well of a 96 multiwell plate Organelles and cell constituents: Mammalian cell nucleus ~10 micron diameter

ATP Production

Subject:

Rating:

No votes yet

SocialTags:

Electrochemical gradient

Metabolism

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

Chapter 9 Notes

Subject:

Rating:

No votes yet

SocialTags:

Glucose

Lactic acid fermentation

Glycolysis

Environment

Tags:

Crista

Mitochondrial matrix

Technology

Chapter 9 notes Cellular Respiration: Harvesting Chemical Energy Concept 9.1 Metabolic pathways that release energy are called catabolic pathways - fermentation and cellular respiration _____________: partial degradation of sugars that occurs w/out the help of O2 ________: O2 is consumed as a reactant along w/ the sugar - more efficient Concept 9.1 Cellular respiration occurs in the _______________ Organic + O2 ? Carbon + H2O + Energy compounds dioxide C6H12O6 + 6O2 ? 6CO2 + 6H2O + Energy 1 glucose = -686 kcals Concept 9.1 ATP is the central molecule responsible for energy used by the cell The cell uses enzymes to transfer phosphate groups from ATP to other compounds (making them _________________) ATP ? ADP + phosphate Concept 9.1

Cellular Respiration Notes

Subject:

Rating:

No votes yet

SocialTags:

Glucose

Environment

Tags:

cellular respiration

biochemistry

Chemistry

Chemiosmosis

Glycolysis