Cellular Respiration
Changing energy in Glucose into
energy in ATP
Aerobic Respiration


Respiration WITH oxygen.
Overall Equation


Glucose + O2 + 2 ATP --> CO2 +H2O + 38 ATP
Net gain of 36 ATP
Aerobic Respiration

Step 1 - Glycolysis




Step 2 - Citric Acid (Krebs) Cycle




Glucose + 2 ATP --> 2 pyruvic acids + 4 ATP
Generates 2 ATP Net and electron carrier molecules
Takes place in Cytosol
Removes One Carbon for Each Cycle
Generates 2 ATP Net and electron carrier molecules
Takes place in Mitochondria
Step 3 - Electron Transport Chain

Generates 32 ATP Net

Takes place in Mitochondria
Glycolysis



Glucose splits into two
Pyruvic Acids.
Little bit of energy
converted from bonds
broken in Pyruvic Acid into
new bonds in ATP.
Pyruvic acid is poisonous
so must be broken apart
further or turned into
something else.
Glucose
Pyruvic
Pyruvic
Acid POISONAcid
+2
ATP
+ electron carriers
Citric Acid/Krebs Cycle



Each Pyruvic Acid broken
down into three CO2.
Little bit of energy
converted from bonds
broken in Pyruvic Acid into
new bonds in ATP.
A LOT of electron carrier
molecules.
Pyruvic
Acid
CO2
CO2
CO2
+ 2 ATP
+ electron carriers
Electron Transport Chain
H+

Electrons from
eenergy carriers drag
eprotons across the
e
+
H+H
membrane.
eeAs each proton
diffuses back across ethe membrane
energy is captured
into bonds of ATP
ATP
ATP
ATP
ATP
H+ H+
H+ +
H
H+
H+
