Another productive school presentation. Again, it contains mostly icons or pictures since when i do reporting, words come out either directly from my mouth or from the participants. it will be easy if you read super duper much first before you consider this presentation. BTW, i called it, ENERGY UTILIZATION. Happy days are coming your life!!!

1. ENERGY
UTILIZATIO
N
Bioenergetics, Enzymes and
Metabolism
KIM JIM F. RABORAR, RN
MA Biology Education
Bicol University
GRADUATE SCHOOL
Legazpi City
Cell and Molecular Biology
Prof. Ma. Eden A. Ante, PhD

2. Objectives
After 2 hours of discussion, MABioEd students
will be able to:
1. Define Metabolism, Bioenergetics and
Enzymes in their own terms
2. Review specific processes related with
metabolism
3. Site specific techniques to be used in
teaching the concepts Metabolism,
Bioenergetics and Enzymes

3. • 2.3 Chemical Equilibrium
• 2.4 Biochemical Energetics
• 2.5 Activation Energy and Reaction Rate
• . Cell Chemistry and BiosynthesisThe Chemical
Components of a Cell
• Catalysis and the Use of Energy by Cells
• How Cells Obtain Energy from Food

4. Can you kill yourself by…
• ….holding your breath?
• ….not eating?
• ….not drinking water?
Hmmn…

5. Energy
The biology of energy transformations
and exchanges within and between
living systems and their environment.
The sum of all chemical
process and energy utilization
in a living system.
A functional protein
that aids in the
speeds up
metabolism.
Definition of terms

6. BIOENERGETICS
The biology of energy transformations
and exchanges within and between
living systems and their environment.

7. Energy for LIFE
How does living
systems make
use of free
energy? What is
the point of
entry of the
“energy” to the
“living world”?
thermodynami
cs
• 2 Principal
forms of
energy
• Flow of Energy
• Exergonic vs.
Endergonic
Reactions
• Coupled
Reactions
• Gibbs free
energy
• ATP: storage
and utilization

8. Bioenergetics

9. Bioenergetics
Photosynthesis vs. Cellular Respiration
Energentically unfavorable vs.
energetically favorable
Increasing order in living systems?

10. Bioenergetics

11. GIBBS’ FREE ENERGY (J.W.G)
AG= Gproducts - Greactants
• AG < 0 ----------forward reaction
• AG > 0 ----------reverse reaction
• AG = 0 ----------equal rate
AG= AH - T AS where H is the enthalpy, T is temp, S is
entropy
(Ball-slide)(molecules in a container)(cherry bomb)
Bioenergetics

12. ATP
• The most important energy carrier molecule
that fuels most chemical reactions.
Bioenergetics

13. Chemiosmotic Theory:
ATP formation in oxidative
phosphorylation in the mitochondria
and chloroplast.
Energy Balance:
Energy intake= storage + internal
heat + external work
Bioenergetics

14. METABOLISM
The sum of all chemical
process and energy utilization
in a living system.

15. Metabolism
Metabolism AnabolismCatabolism
Build-up
Break down
Endergonic
Reaction
Exergonic
Reaction
Energetically
unfavorable
Energetically

16. REDOX
Reaction- Simply put,
electron
transfer
Metabolism

17. Metabolism
biosynth
esis

18. Metabolism

19. Metabolism

20. ENZYMES
A functional
protein that aids in
the metabolism.

21. • Lowers the needed energy (activation energy)
to facilitate processes.
• Non-protein molecules that binds with the
enzyme to assist in the metabolism.
Enzymes
Coenzymes

22. Enzymes

23. Enzymes

24. Enzymes

25. Enzymes

26. Enzymes

27. Enzymes

28. Enzymes

29. • Krogh, David et al. Guide to Nature: BIOLOGY
• Lodish, Harvey F. et.al.. MOLECULAR CELL BIOLOGY, 4th
ed. 1999. WH Freeman and Company: New York, USA.
• Alberts, Bruce et.al. Molecular Biology of the Cell, 4th
ed. 2002
• Merriam-Webster’s Dictionary
• http://chemwiki.ucdavis.edu/Theoretical_Chemistry/C
hemical_Bonding/General_Principles/Bond_Energies
• www.youtube.com (Cellular Respiration by Hank
Green)
References