Cellular RespirationChapter 8.3

Animal

Plant

Mitochondria

Cellular Respiration Catabolic pathway Organic sugars are broken down to

release energy for the cell Electrons are used for energy (opposite of photosynthesis)

C6H12O6 + 6 O2 6 CO2 + 6 H2O

Cellular Respiration

Glycolysis

Krebs Cycle

Electron Transpor

t

Anaerobic:

Does not require oxygen

Aerobic:Requires oxygen

Outer membrane Intermembrane space

Inner membrane

Matrix

Mitochondria

Glycolysis Overall Purpose:

Initial break down of GLUCOSE to release energy

Produces ATP and NADH molecules for energy storage

Takes place in the…. CYTOPLASM

Reactants: Glucose (ADP & NAD+)

Products: Two PYRUVATE molecules (ATP & NADH)

Krebs Cycle (Citric Acid Cycle)

Overall Purpose: In the presence of oxygen,

pyruvate is broken down to carbon dioxide (CO2)

Takes place in the…. MITOCHONDRIAL

MATRIX Reactants:

Pyruvate (ADP, NAD+, & FAD)

Products: CO2

(ATP, NADH, & FADH2)

Overall Purpose: High-energy electrons and hydrogen ions from NADH and

FADH2 are used to convert ADP to ATP Electrons from NADH and FADH2 are passed to the electron

transport chain Oxygen picks up the electrons (and hydrogen) to make water Hydrogen ions flow through ATP synthase to make ATP

Takes place in the…. INNER MITOCHONDRIAL MEMBRANE

Reactants: (NADH & FADH2)

Oxygen Products:

(NAD & FAD) water

Electron Transport

http://www.google.com/url?sa=i&rct=j&q=cellular+respiration&source=images&cd=&cad=rja&docid=Ut7RtL0v4dHelM&tbnid=itMcU8pcDvpTJM:&ved=0CAUQjRw&url=http://zombiemechanics.com/2011/09/review-the-physics-of-zombies-iii/detailed_cellular_respiration_cycle-modified/&ei=2ootUbO8Icy60QH6wIGIDg&bvm=bv.42965579,d.dmQ&psig=AFQjCNG4zBNSwUagBfAnwYeQEZG2KKGm7g&ust=1362025532483063

What about bacteria? Prokaryotic cells (bacteria)

don’t have mitochondria…

Electron transport takes place in the cell membrane!

Mr. Anderson’s Podcast (Bozemanbiology):

http://www.youtube.com/watch?v=Gh2P5CmCC0M

Lactic Acid Fermentation

The equation for lactic acid fermentation after glycolysis is:

pyruvic acid + NADH → lactic acid + NAD+