In the presence of Oxygen, Cells
convert energy stored in Glucose
into ATP
1
Flow of Energy
2
All living things must be able to
convert glucose into ATP.
3
Adenosine Triphosphate
4
5
Energy is released from Glucose through
“burning” with oxygen.
6
Energy (in the form of glucose)
is supplied by the foods you eat.
7
Oxygen is supplied by the air you breathe, and
Carbon dioxide is released into the atmosphere.
O2
8
Plants make their own glucose
through Photosynthesis
Inside your cells, mitochondria use
oxygen to release energy from glucose.
10
Specific chemical reactions occur in each
compartment of the mitochondrion.
11
The most efficient release of
energy occurs in three main stages
of Cellular Respiration.
O2
Pyruvic
acid
Glucose
CO2
H2O
12
Glycolysis splits glucose into
2 pyruvic acid molecules
http://www.science.smith.edu/departments/Biology/Bio231/glycolysis.html
13
+
NAD
NADH
An electron carrier
• Empty: no electrons
• Carrying electrons
14
The Krebs Cycle releases energy from Pyruvic
acid and produces CO2
http://www.science.smith.edu/departments/Biology/Bio231/krebs.html
15
Electron carriers (NADH & FADH2) generate
even more ATP in the Electron Transport Chain.
http://www.science.smith.edu/departments/Biology/Bio231/etc.html
16
Oxidative Phosphorylation
Detail (ETC)
http://www.youtube.com/watch?v=kN5Mtq
AB_Yc
17
ATP Synthase Detail
Watch the youtube video to learn how ATP Synthase works.
http://www.youtube.com/watch?v=_97mnA
_kKds&feature=related
18
ATP Tally
Part of CR
# NADH
Produced
# FADH2
produced
# ATP
produced
Glycolysis
Krebs Cycle
ETC
19
Check for Understanding:
1. Explain why plants must do both,
photosynthesis and cellular respiration?
2. Where in the cell does glycolysis, the Krebs
cycle and the electron transport take place?
3. What is the final electron acceptor in Oxidative
Phosphorylation (ETC)?
4. Which parts of the mitochondria are analogous
to the parts of the chloroplast? Explain how
they are alike.
Textbook Artist:
• You have been assigned to illustrate the
biochemical pathways involved in cellular
respiration.
• You should include the processes of glycolysis, the
Krebs cycle and the Electron Transport Chain
• You should indicate the reactants and products of
each phase
• You should include the total energy products for
each phase
• Finally, indicate where in the cell each phase
occurs.
Create an amusement park ride using one of
the Cell Respiration processes as your
inspiration.
1. Create an analogy for your starting material (glucose,
or pyruvic acid)
2. Show how it will change throughout the ride
3. Show how energy molecules are produced (what will be
the ATP released? Or NADH?)
4. Describe your ride, and how it relates to the CR
process.
22
• Create an amusement park using Cell
Respiration as your inspiration.
• Use analogies for the starting materials,
process and products of each process
(like glucose might be 6 people on a ride
together)
23