Review Guide
Aerobic Cell Respiration
• The process by which the chemical
energy of "food" molecules [glucose]
is released and partially captured in
the form of ATP.
Heat
CO2
Glucose or
Other
Organic
Molecules
ATP
Mitochondria
H 2O
Respiration can be…
AEROBIC
-O2 is required.
-process completed
inside the
mitochondria
-produces
significantly more
ATP’s.
ANAEROBIC
-O2 is NOT required.
-process completed in
the cytoplasm
-produces
significantly less
ATP’s.
Overview of Aerobic Respiration
C6H12O6 + 6O2
If you reversed the
direction of the
reaction, then
which process
would be involved?
6CO2 + 6H2O + ATP
Three stages make up Cell
Respiration [Aerobic Pathway]:
I. Glycolysis
-occurs in the
cytoplasm
-does not require
O2
III. Electron
Transport Chain
-occurs in the
mitochondria
•Requires oxygen
-most number of
ATP’s produced
II. Krebs Cycle
-occurs in the
mitochondrion
•Requires oxygen
-C in glucose is
released as CO2
-high-energy electrons
produced via the
molecule NADH and
FADH2
Energy in cell is stored in
these molecules:
NADH
FADH2
ATP
Where it all happens:
Weird fact – mitochondria like
Chloroplasts have their own special
DNA – maybe they were once bacteria!!!
The enormous number of
“infoldings” inside the
mitochondria provides a
great amount of surface
area for the electron
transport chain reactions
in Cell Respiration.
Electron transport
Chain - cristae
What kinds of Cells have
lots of mitochondria:
• Cells that have a high metabolism – lots of
chemical reactions:
– Liver cells
– Muscle cells
– Intestinal cells
– Eye cells
– Heart cells
Cells types that have and
don’t have Mitochondria
Eukaryotes – Cells that have a nucleus and
membrane bound organelles have
mitochondria
Cells that are eukaryotes include:
• Animal cells
So the answer is…….
• Plant cells
• Fungus cells
• Protist cells like algae
Cells that are not eukaryotes are called
Prokaryotes and these include bacteria.
Practice Questions
All of the following are organic molecules
(carbon containing) except:
a) Lipids
b) DNA
c) Glucose
d) Water
Practice Questions
Energy conversion within an eukaryotic
cell would be limited by the removal
of the cell’s
a) Nucleus
b) Lysosome
c) Mitochondria
d) Plastids
What is the effect of adding more and more sugar [glucose] to the rate of
cell respiration?
The amount of ATP produced is directly proportional to the _____?_____.
Which molecule is represented by “A”?
Which other products is represented by “B”?
How can we tell that the process happening is NOT
photosynthesis?