http://j-z-f.tumblr.com/post/2539670930/mc-escher-waterfall-animated

Energy Use

Harnessing the Flow of Particles

Chemiosmosis - ATP Synthases Harnessing the Flow of Protons

H+H+

H+

H+H+

H+

H+ H+

H+

H+

H+

H+

H+

H+

H+

H+

H+

H+

H+

H+

H+

H+

H+

H+

ADP PATPADP PATP

ATP Synthase

Electron Transport Chain Energized e- release stored E as they move from one

molecule to another The released E is used to pump protons from low

high concentration

H+ H+

H+

H+H+ H+

H+

H+

e-

ADP PATP

H+

Respiratory Review1. How can a cell generate ATP? What is this specific

process called?2. How can a cell build up a proton gradient? What is

the name for the system of molecules that carry out this function?

3. How can a cell/org obtain energized electrons?4. In CR, the ETC is part of the inner mitochondrial

membrane. In Ps, it’s part of the thylakoid membrane. What problem might arise if the membrane used is the cell membrane?

H+e-

Redox Reactions Loss of e- = oxidation Gain of e- = reduction Electronegative particles

attract e-

e- release E when dropping to more stable state

Oxidized Reduced

Oxidation of Organic Molecules PE of C-H bonds is released during CR

C6H12O6 + 6O2 6CO2 + 6H2O

This catabolic, exergonic, redox rxn requires enzymes

Cellular Respiration Summarye-e-e-

ADP PATPADP PATPO CO2

H+

H+Glucose

Oxidation Baby Steps Oxidation of glucose

Worth 38 ATP Simultaneous E release

would damage cell NAD

nicotinamide adenine dinucleotide

e- shuttle Glucose ETC

H

NAD

Oxidation Baby Steps e- are handed off

to increasingly electronegative molecules

E is released with each step

O2 is final e- acceptor

One of these things is not like the others Mechanical, Transport, Heat, Chemical Uracil, Dehydrogenase, Adenine,

Nicotinamide Catabolic, Redox, Exergonic, Systemic Krebs Cycle, Dark Reactions, Electron

Transport Chain, Glycolysis