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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!!!
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ENERGY UTILIZATIONBioenergetics, Enzymes and Metabolism
KIM JIM F. RABORAR, RNMA Biology Education
Bicol UniversityGRADUATE SCHOOLLegazpi City
Cell and Molecular BiologyProf. Ma. Eden A. Ante, PhD
Objectives
After 2 hours of discussion, MABioEd students will be able to:1. Define Metabolism, Bioenergetics and
Enzymes in their own terms2. Review specific processes related with
metabolism3. Site specific techniques to be used in
teaching the concepts Metabolism, Bioenergetics and Enzymes
• 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
Can you kill yourself by…
•….holding your breath?•….not eating?•….not drinking water?
Hmmn…
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
BIOENERGETICSThe biology of energy transformations and
exchanges within and between living systems and their environment.
Energy for LIFEHow does living systems make use
of free energy? What is the point
of entry of the “energy” to the “living world”?
Bioenergetics• 2 laws of
thermodynamics• 2 Principal forms of
energy• Flow of Energy• Exergonic vs.
Endergonic Reactions
• Coupled Reactions• Gibbs free energy• ATP: storage and
utilization• Chemiosmotic
Theory• Energy Balance
Bioenergetics
Bioenergetics
Photosynthesis vs. Cellular RespirationEnergentically unfavorable vs. energetically
favorableIncreasing order in living systems?
Bioenergetics
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
ATP• The most important energy carrier molecule
that fuels most chemical reactions.
Bioenergetics
Chemiosmotic Theory:ATP formation in oxidative phosphorylation in the mitochondria and chloroplast.
Energy Balance:Energy intake= storage + internal heat + external work
Bioenergetics
METABOLISMThe sum of all chemical process and energy utilization in a living system.
MetabolismMetabolism AnabolismCatabolism
Build-upBreak downEndergonic
ReactionExergonic Reaction
Energetically unfavorableEnergetically
favorablePhotosynthesis
Cellular Respiration
REDOX Reaction- Simply put,
electron transfer
Metabolism
Metabolismbiosynthesis
Metabolism
Metabolism
ENZYMESA functional protein that aids in the metabolism.
• Lowers the needed energy (activation energy) to facilitate processes.
• Non-protein molecules that binds with the enzyme to assist in the metabolism.
Enzymes
Coenzymes
Enzymes
Enzymes
Enzymes
Enzymes
Enzymes
Enzymes
Enzymes
• 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/Chemical_Bonding/General_Principles/Bond_Energies
• www.youtube.com (Cellular Respiration by Hank Green)
References
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