About how cellular respiration occurs in Mitochondria, it discusses first the parts and functions of mitochondrion then the types of respiration and the 3 processes occurs in aerobic respiration.

2. Objectives:
At the end of the discussion, the students are expected
to:
•Discuss the overall mechanism of cellular respiration
•Differentiate aerobic and anaerobic respiration
•Write the overall equation of cellular respiration and
•Give the importance of studying cellular respiration
Cellular Respiration

4. Mitochondria
 a membrane bound cellular
structure and is found in most of
the eukaryotic cells.
 ranges from 0.5 to 1.0
micrometer in diameter.
 power plants of the cells.
 plays an important role in the
production of ATP via the process
of oxidative phosphorylation.
Cellular Respiration

5.  rod shaped structure
found in both animal
and plant cells.
 a double membrane
bound organelle.
 It has the outer
membrane and the
inner membrane.
 The membranes are
made up of
phospholipids and
Structure of Mitochondria

6. Components of Mitochondria
Outer membrane
It is smooth and is composed
of equal amounts of
phospholipids and proteins.
It has a large number of
special proteins known as the
porins
The outer membrane is freely
permeable to nutrient
molecules,ions, energy
molecules like the ATP and
ADP molecules.

7. Inner membrane
more complex in structure.
 It is folded into a number of
folds many times and is
known as the cristae.
 is strictly permeable, it is
permeable only to oxygen,
ATP and it also helps in
regulating transfer of
metabolites across the
membrane.
Components of Mitochondria

8. Intermembrane space
 space between the
outer and inner
membrane of the
mitochondria,
 it has the same
composition as that of
the cell's cytoplasm.
Components of Mitochondria

9. Matrix
 is a complex mixture of
proteins and enzymes.
 These enzymes are
important for the
synthesis of ATP
molecules,
mitochondrial
ribosomes, tRNAs and
mitochondrial DNA.
Components of Mitochondria

10. Cellular Respiration
the process by which
the organisms obtain
the energy available in
the carbohydrates
•ATP –used as cellular
energy currency

11. Two types of Cellular Respiration:
•Aerobic Respiration: a type of respiration which
is carried on in the presence of oxygen by which
the oxygen is obtained from air or from water in
which is dissolved.
•Glucose + Oxygen  Carbon dioxide + Water +
Energy

12. Two types of Cellular Respiration:
Anaerobic Respiration – a type of respiration
in which a number of one- celled organisms,
including yeast and many forms of bacteria,
can carry on in the absence of oxygen
Glucose  Lactic acid + Energy

13. Aerobic Respiration
Cellular Respiration

14. Glycolysis
(Glucose Splitting Reaction)
It is the process in which
one molecule of glucose
is broken down to form
two molecules of
pyruvic acid
Occurs in the cytoplasm
of the cell
 4 ATP and 2 NADH are
produced but this pathway
produces a net gain of 2
ATP per molecule of
glucose

15. Krebs Cycle
(Citric Acid cycle)
named after Hans Kreb.
 occurs in the mitochondrion
of a cell.
 For each turn of the cycle, 3
molecules of carbon dioxide
are produced from one pyruvic
molecules and 5 pairs of
hydrogen atoms are removed
by coenzymes NAD and FAD
forms (per two molecules of
pyruvic acid) carbon dioxide,
two ATP molecules, 6 NADH
molecules, and 2 FADH2
molecules.

16. Electron Transport Chain (ETC)
•This occurs in the cristae
of the mitochondria where
a series of cytochromes
and coenzymes exist.
• The electrons in NADH
and FADH2 flow through a
series of electrons
transport acceptors. The
electron pass through a
series of oxidation-
reduction reaction, giving
up energy to form ATP.
At the end, the electrons, hydrogen ions, and free
oxygen combine to form water molecules.

17. Electron Transport Chain (ETC)

18. Chemiosmosis
• - involves the pumping
of protons through
special channels in the
membrane of
mitochondria from the
inner to the outer
compartments.
• is the movement
of ions across a
selectively permeable
membrane, down their
electrochemical
gradient
• Peter Mitchell

20. ANAEROBIC RESPIRATION
Fermentation
•It is a process in which energy can be released from
glucose even though oxygen is not available.
•During this stage, the pyruvic acid produced by glycolysis
accepts 2H from NADH, and changes to some other end
product.
•In yeast cells, the end products are ethyl alcohol and
carbon dioxide.
• In certain bacteria and in muscles, the pyruvic acid
changes to lactic acid.
Cellular Respiration

21. Overall Process

22. Overall equation during cellular
respiration
•Glucose + Oxygen CO2 + H2O + ATP
•Each ATP molecule is capable of releasing
7.3 kilocalories of energy per mole.

23. Sources
• http://highered.mheducation.com/sites/0072507470/student_view0/c
hapter25/animation__electron_transport_system_and_atp_synthesis_
_quiz_2_.html
• http://highered.mheducation.com/sites/0072507470/student_view0/c
hapter25/animation__how_glycolysis_works.html
• http://highered.mheducation.com/sites/0072507470/student_view0/c
hapter25/animation__how_the_krebs_cycle_works__quiz_2_.html
• https://en.wikipedia.org/
• e- BIOLOGY: The next Generation by Gil Nonato C. Santos and et.al